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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>
This commit is contained in:
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
them manually. In contrast, the software calibration code can provide
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
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
calibration completes, one can remove this setting from the config.)
There are two ways to perform the probing - manual probing and
automatic probing. Automatic probing utilizes a hardware device
There are two ways to perform the probing - manual probing
(`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
bed. Manual probing involves using the
["paper test"](Bed_Level.md#the-paper-test) to determine the height at
each probe point. It is recommended to use manual probing for delta
calibration. A number of common printer kits come with probes that are
not sufficiently accurate (specifically, small differences in arm
length can cause effector tilt which can skew an automatic
probe). Manual probing only takes a few minutes and it eliminates
error introduced by the probe.
bed. The manual probing method will move the head near the bed and
then wait for the user to follow the
["paper test"](Bed_Level.md#the-paper-test) steps. It is recommended
to use manual probing for delta calibration. A number of common
printer kits come with probes that are not sufficiently accurate
(specifically, small differences in arm length can cause effector tilt
which can skew an automatic probe). Manual probing only takes a few
minutes and it eliminates error introduced by the probe.
To perform the basic probe, make sure the config has a
[delta_calibrate] section defined and run: