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docs: Try to make manual vs automatic probing more clear in DELTA_CALIBRATE 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Kevin O'Connor 2019-02-13 23:18:41 -05:00
parent 0da65bf6b0
commit dd303ec4a9
1 changed files with 12 additions and 11 deletions
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23
docs/Delta_Calibrate.md
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@ -7,7 +7,7 @@ printer motion on a delta printer. Each one of these parameters has a
non-obvious and non-linear impact and it is difficult to calibrate non-obvious and non-linear impact and it is difficult to calibrate
them manually. In contrast, the software calibration code can provide them manually. In contrast, the software calibration code can provide
excellent results with just a few minutes of time. No special probing excellent results with just a few minutes of time. No special probing
hardware is necessary to get good results. hardware is necessary.
Ultimately, the delta calibration is dependent on the precision of the Ultimately, the delta calibration is dependent on the precision of the
tower endstop switches. If one is using Trinamic stepper motor drivers tower endstop switches. If one is using Trinamic stepper motor drivers
@ -37,17 +37,18 @@ the bed. It is typical to permit this during calibration by updating
the config so that the printer's `minimum_z_position=-5`. (Once the config so that the printer's `minimum_z_position=-5`. (Once
calibration completes, one can remove this setting from the config.) calibration completes, one can remove this setting from the config.)
There are two ways to perform the probing - manual probing and There are two ways to perform the probing - manual probing
automatic probing. Automatic probing utilizes a hardware device (`DELTA_CALIBRATE METHOD=manual`) and automatic probing
(`DELTA_CALIBRATE`). Automatic probing utilizes a hardware device
capable of triggering when the toolhead is at a set distance from the capable of triggering when the toolhead is at a set distance from the
bed. Manual probing involves using the bed. The manual probing method will move the head near the bed and
["paper test"](Bed_Level.md#the-paper-test) to determine the height at then wait for the user to follow the
each probe point. It is recommended to use manual probing for delta ["paper test"](Bed_Level.md#the-paper-test) steps. It is recommended
calibration. A number of common printer kits come with probes that are to use manual probing for delta calibration. A number of common
not sufficiently accurate (specifically, small differences in arm printer kits come with probes that are not sufficiently accurate
length can cause effector tilt which can skew an automatic (specifically, small differences in arm length can cause effector tilt
probe). Manual probing only takes a few minutes and it eliminates which can skew an automatic probe). Manual probing only takes a few
error introduced by the probe. minutes and it eliminates error introduced by the probe.
To perform the basic probe, make sure the config has a To perform the basic probe, make sure the config has a
[delta_calibrate] section defined and run: [delta_calibrate] section defined and run: