screws_tilt_adjust: Add new screws_tilt_adjust tool (#1367)
Signed-off-by: Rui Caridade <rui.mcbc@gmail.com>
This commit is contained in:
Rui Caridade
KevinOConnor
parent
fcaa75f014
commit
5c0a2479be
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@ -126,6 +126,9 @@ radius: 50
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#samples: 1
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# The number of times to probe each point. The probed z-values will
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# be averaged. The default is to probe 1 time.
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#samples_result: average
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# One can choose median or average between probes samples
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# The default is average.
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#sample_retract_dist: 2.0
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# The distance (in mm) to retract between each sample if sampling
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# more than once. The default is 2mm.
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@ -115,6 +115,9 @@
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#samples: 1
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# The number of times to probe each point. The probed z-values
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# will be averaged. The default is to probe 1 time.
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#samples_result: average
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# One can choose median or average between probes samples
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# The default is average.
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#sample_retract_dist: 2.0
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# The distance (in mm) to retract between each sample if
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# sampling more than once. Default is 2mm.
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@ -157,6 +160,9 @@
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#samples: 1
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# The number of times to probe each point. The probed z-values
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# will be averaged. The default is to probe 1 time.
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#samples_result: average
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# One can choose median or average between probes samples
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# The default is average.
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#sample_retract_dist: 2.0
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# The distance (in mm) to retract between each sample if
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# sampling more than once. Default is 2mm.
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@ -258,6 +264,47 @@
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# The speed (in mm/s) when moving from a horizontal_move_z position
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# to a probe_height position. The default is 5.
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# Tool to help adjust bed screws tilt using Z probe. One may define a
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# [screws_tilt_adjust] config section to enable a SCREWS_TILT_CALCULATE
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# g-code command.
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#[screws_tilt_adjust]
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#screw1: 100,100
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# The X,Y coordinate of the first bed leveling screw. This is a
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# position to command the nozzle to that is directly above the bed
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# screw (or as close as possible while still being above the bed).
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# This is the base screw used in calculations.
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# This parameter must be provided.
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#screw1_name: front screw
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# An arbitrary name for the given screw. This name is displayed when
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# the helper script runs. The default is to use a name based upon
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# the screw XY location.
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#screw2:
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#screw2_name:
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#...
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# Additional bed leveling screws. At least two screws must be
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# defined.
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#speed: 50
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# The speed (in mm/s) of non-probing moves during the calibration.
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# The default is 50.
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#horizontal_move_z: 5
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# The height (in mm) that the head should be commanded to move to
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# just prior to starting a probe operation. The default is 5.
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#samples: 1
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# The number of times to probe each point. The probed z-values
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# will be averaged. The default is to probe 1 time.
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#sample_retract_dist: 2.0
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# The distance (in mm) to retract between each sample if
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# sampling more than once. Default is 2mm.
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#samples_result: median
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# One can choose median or average between screw probes
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# The default is average.
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#screw_thread: CW-M3
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# The type of screw used for bed level, M3, M4 or M5 and the
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# direction of the knob used to level the bed, clockwise decrease
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# counter-clockwise decrease.
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# Accepted values: CW-M3, CCW-M3, CW-M4, CCW-M4, CW-M5, CCW-M5.
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# Default value is CW-M3, most printers use an M3 screw and
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# turning the knob clockwise decrease distance.
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# Multiple Z stepper tilt adjustment. This feature enables independent
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# adjustment of multiple z steppers (see stepper_z1 section below) to
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@ -284,6 +331,9 @@
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#samples: 1
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# The number of times to probe each point. The probed z-values
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# will be averaged. The default is to probe 1 time.
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#samples_result: average
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# One can choose median or average between probes samples
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# The default is average.
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#sample_retract_dist: 2.0
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# The distance (in mm) to retract between each sample if
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# sampling more than once. Default is 2mm.
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@ -326,6 +376,9 @@
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# just prior to starting a probe operation. The default is 5
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#samples: 1
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# Number of probe samples per point. The defaut is 1
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#samples_result: average
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# One can choose median or average between probes samples
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# The default is average.
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#sample_retract_dist: 2.0
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# Distance in mm to retract the probe between samples. Default is 2.
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@ -274,6 +274,16 @@ section is enabled:
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the bed screws so that the bed is a constant distance from the
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nozzle.
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## Bed Screws Tilt adjust Helper
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The following commands are available when the "screws_tilt_adjust"
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config section is enabled:
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- `SCREWS_TILT_CALCULATE`: This command will invoke the bed screws
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adjustment tool. It will command the nozzle to different locations
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(as defined in the config file) probing the z height and calculate
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the number of knob turns to adjust the bed level.
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IMPORTANT: You MUST always do a G28 before using this command.
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## Z Tilt
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The following commands are available when the "z_tilt" config section
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@ -133,3 +133,57 @@ prompt for coarse adjustments directly above each screw position, and
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once those are accepted, it will prompt for fine adjustments at the
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additional locations. Continue to use `ACCEPT` and `ADJUSTED` at each
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position.
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# Adjusting bed leveling screws using the bed probe
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This is another way to calibrate the bed level using the bed probe. To
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use it you must have a Z probe (BL Touch, Inductive sensor, etc).
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To enable this feature, one would determine the additional nozzle
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coordinates near the screws and add them to the config file. For example,
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it might look like:
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```
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[screws_tilt_adjust]
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screw1: -5,30
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screw1_name: front left screw
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screw2: 155,30
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screw2_name: front right screw
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screw3: 155,190
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screw3_name: rear right screw
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screw4: -5,190
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screw4_name: rear left screw
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horizontal_move_z: 10.
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speed: 50.
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samples: 3
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sample_retract_dist: 2.
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samples_result: median
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screw_thread: CW-M3
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```
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One can indicate the number of times to repeat probe on each screw and
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if the value is the median or the average read probe.
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The screw1 is always the reference point for the others, so the system
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assumes that screw1 is in the correct height.
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Then to use this feature you must preform every time `G28` before
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`SCREWS_TILT_CALCULATE` and after bed is probed you get an output like this:
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```
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Send: G28
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Recv: ok
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Send: SCREWS_TILT_CALCULATE
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Recv: // front left screw (Base): X -5.0, Y 30.0, Z 2.48750
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Recv: // front right screw : X 155.0, Y 30.0, Z 2.36000 : Adjust -> CW 01:15
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Recv: // rear right screw : X 155.0, Y 190.0, Z 2.71500 : Adjust -> CCW 00:50
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Recv: // read left screw : X -5.0, Y 190.0, Z 2.47250 : Adjust -> CW 00:02
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Recv: ok
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```
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This means that:
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- front left screw is the reference point you must not change it.
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- front right screw must be turned clockwise 1 full turn and a quarter turn
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- rear right screw must be turned counter-clockwise 50 minutes
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- read left screw must be turned clockwise 2 minutes (not need it's ok)
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Repeat the process several times until you get a good level bed, normally when
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all adjusts are below 6 minutes.
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@ -240,6 +240,9 @@ class ProbePointsHelper:
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self.samples = config.getint('samples', 1, minval=1)
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self.sample_retract_dist = config.getfloat(
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'sample_retract_dist', 2., above=0.)
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self.samples_result = config.getchoice('samples_result',
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{'median': 0, 'average': 1},
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default='average')
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# Internal probing state
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self.results = []
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self.busy = self.manual_probe = False
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@ -295,9 +298,26 @@ class ProbePointsHelper:
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if i < self.samples - 1:
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# retract
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self._lift_z(self.sample_retract_dist, add=True)
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avg_pos = [sum([pos[i] for pos in positions]) / self.samples
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for i in range(3)]
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self.results.append(avg_pos)
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if self.samples_result == 1:
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# Calculate Average
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calculated_value = [sum([pos[i] for pos in positions]) /
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self.samples for i in range(3)]
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else:
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# Calculate Median
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sorted_z_positions = sorted([position[2]
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for position in positions])
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middle = self.samples // 2
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if (self.samples & 1) == 1:
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# odd number of samples
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median = sorted_z_positions[middle]
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else:
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# even number of samples
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median = (sorted_z_positions[middle] +
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sorted_z_positions[middle - 1]) / 2
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calculated_value = [positions[0][0],
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positions[0][1],
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median]
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self.results.append(calculated_value)
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def start_probe(self, params):
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# Lookup objects
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self.toolhead = self.printer.lookup_object('toolhead')
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@ -0,0 +1,97 @@
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# Helper script to adjust bed screws tilt using Z probe
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#
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# Copyright (C) 2019 Rui Caridade <rui.mcbc@gmail.com>
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#
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# This file may be distributed under the terms of the GNU GPLv3 license.
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import math
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import probe
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def parse_coord(config, param):
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pair = config.get(param).strip().split(',', 1)
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try:
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return (float(pair[0]), float(pair[1]))
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except:
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raise config.error("%s:%s needs to be an x,y coordinate" % (
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config.get_name(), param))
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class ScrewsTiltAdjust:
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def __init__(self, config):
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self.config = config
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self.printer = config.get_printer()
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self.screws = []
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# Verify that a probe exists
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try:
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self.printer.lookup_object("probe")
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except:
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raise self.gcode.error("Error: you must have a probe on "
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"your config file.")
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# Read config
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for i in range(99):
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prefix = "screw%d" % (i + 1,)
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if config.get(prefix, None) is None:
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break
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screw_coord = parse_coord(config, prefix)
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screw_name = "screw at %.3f,%.3f" % screw_coord
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screw_name = config.get(prefix + "_name", screw_name)
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self.screws.append((screw_coord, screw_name))
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if len(self.screws) < 3:
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raise config.error("screws_tilt_adjust: Must have "
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"at least three screws")
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self.threads = {'CW-M3': 0, 'CCW-M3': 1, 'CW-M4': 2, 'CCW-M4': 3,
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'CW-M5': 4, 'CCW-M5': 5}
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self.thread = config.getchoice('screw_thread', self.threads,
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default='CW-M3')
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# Initialize ProbePointsHelper
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points = [coord for coord, name in self.screws]
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self.probe_helper = probe.ProbePointsHelper(self.config,
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self.probe_finalize,
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default_points=points)
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# Register command
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self.gcode = self.printer.lookup_object('gcode')
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self.gcode.register_command("SCREWS_TILT_CALCULATE",
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self.cmd_SCREWS_TILT_CALCULATE,
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desc=self.cmd_SCREWS_TILT_CALCULATE_help)
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cmd_SCREWS_TILT_CALCULATE_help = "Tool to help adjust bed leveling " \
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"screws by calculating the number " \
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"of turns to level it."
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def cmd_SCREWS_TILT_CALCULATE(self, params):
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self.probe_helper.start_probe(params)
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def probe_finalize(self, offsets, positions):
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# Factors used for CW-M3, CCW-M3, CW-M4, CCW-M4, CW-M5 and CCW-M5
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threads_factor = {0: 0.5, 1: 0.5, 2: 0.7, 3: 0.7, 4: 0.8, 5: 0.8}
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# Process the read Z values and
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for i, screw in enumerate(self.screws):
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if i == 0:
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# First screw is the base position used for comparison
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z_base = positions[i][2]
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coord_base, name_base = screw
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# Show the results
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self.gcode.respond_info("%s (Base): X %.1f, Y %.1f, Z %.5f" %
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(name_base, coord_base[0],
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coord_base[1], z_base))
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else:
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# Calculate how knob must me adjusted for other positions
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z = positions[i][2]
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coord, name = screw
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diff = z_base - z
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if abs(diff) < 0.001:
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adjust = 0
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else:
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adjust = diff / threads_factor.get(self.thread, 0.5)
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if (self.thread & 1) == 1:
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sign = "CW" if adjust < 0 else "CCW"
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else:
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sign = "CCW" if adjust < 0 else "CW"
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full_turns = math.trunc(adjust)
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decimal_part = adjust - full_turns
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minutes = round(decimal_part * 60, 0)
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# Show the results
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self.gcode.respond_info("%s : X %.1f, Y %.1f, Z %.5f : "
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"Adjust -> %s %02d:%02d" %
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(name, coord[0], coord[1], z, sign,
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abs(full_turns), abs(minutes)))
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def load_config(config):
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return ScrewsTiltAdjust(config)
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@ -0,0 +1,89 @@
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# Test config for bed screws tool with bltouch
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[stepper_x]
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step_pin: ar54
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dir_pin: ar55
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enable_pin: !ar38
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step_distance: .0125
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endstop_pin: ^ar3
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position_endstop: 0
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position_max: 200
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homing_speed: 50
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[stepper_y]
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step_pin: ar60
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dir_pin: !ar61
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enable_pin: !ar56
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step_distance: .0125
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endstop_pin: ^ar14
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position_endstop: 0
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position_max: 200
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homing_speed: 50
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[stepper_z]
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step_pin: ar46
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dir_pin: ar48
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enable_pin: !ar62
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step_distance: .0025
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endstop_pin: probe:z_virtual_endstop
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position_max: 200
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[extruder]
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step_pin: ar26
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dir_pin: ar28
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enable_pin: !ar24
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step_distance: .002
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nozzle_diameter: 0.400
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filament_diameter: 1.750
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heater_pin: ar10
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sensor_type: EPCOS 100K B57560G104F
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sensor_pin: analog13
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control: pid
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pid_Kp: 22.2
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pid_Ki: 1.08
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pid_Kd: 114
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min_temp: 0
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max_temp: 250
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[heater_bed]
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heater_pin: ar8
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sensor_type: EPCOS 100K B57560G104F
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sensor_pin: analog14
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control: watermark
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min_temp: 0
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max_temp: 130
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[bltouch]
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sensor_pin: ar30
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control_pin: ar32
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z_offset: 1.15
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[bed_mesh]
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min_point: 10,10
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max_point: 180,180
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[mcu]
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serial: /dev/ttyACM0
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pin_map: arduino
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[printer]
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kinematics: cartesian
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max_velocity: 300
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max_accel: 3000
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max_z_velocity: 5
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max_z_accel: 100
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[screws_tilt_adjust]
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screw1: 10,30
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screw1_name: front left screw
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screw2: 155,30
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screw2_name: front right screw
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screw3: 155,190
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screw3_name: rear right screw
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screw4: 10,190
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screw4_name: read left screw
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horizontal_move_z: 10.
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speed: 50.
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samples: 3
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sample_retract_dist: 2.
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samples_result: median
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screw_thread: CW-M3
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@ -0,0 +1,7 @@
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# Test case for bed screws tilt helper tool
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CONFIG screws_tilt_adjust.cfg
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DICTIONARY atmega2560-16mhz.dict
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# Simple script to test
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G28
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SCREWS_TILT_CALCULATE
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