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Translation

[gcode_macro SENSORLESS_HOME_X]
gcode:
{% set HOME_CUR = 0.700 %}
{% set driver_config = printer.configfile.settings['tmc2209 stepper_x'] %}
{% set RUN_CUR = driver_config.run_current %}
# Set current for sensorless homing
SET_TMC_CURRENT STEPPER=stepper_x CURRENT={HOME_CUR}
# Pause to ensure driver stall flag is clear
G4 P2000
# Home
G28 X0
# Move away
G90
G1 X5 F1200
# Set current during print
SET_TMC_CURRENT STEPPER=stepper_x CURRENT={RUN_CUR}
507/5070 · 507

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TMC interpolate setting introduces small position deviation
Die TMC interpolate einstellung führt zu geringen Positionsabweichungen
The TMC driver `interpolate` setting may reduce the audible noise of printer movement at the cost of introducing a small systemic positional error. This systemic positional error results from the driver's delay in executing "steps" that Klipper sends it. During constant velocity moves, this delay results in a positional error of nearly half a configured microstep (more precisely, the error is half a microstep distance minus a 512th of a full step distance). For example, on an axis with a 40mm rotation_distance, 200 steps_per_rotation, and 16 microsteps, the systemic error introduced during constant velocity moves is ~0.006mm.
 
For best positional accuracy consider using spreadCycle mode and disable interpolation (set `interpolate: False` in the TMC driver config). When configured this way, one may increase the `microstep` setting to reduce audible noise during stepper movement. Typically, a microstep setting of `64` or `128` will have similar audible noise as interpolation, and do so without introducing a systemic positional error.
 
If using stealthChop mode then the positional inaccuracy from interpolation is small relative to the positional inaccuracy introduced from stealthChop mode. Therefore tuning interpolation is not considered useful when in stealthChop mode, and one can leave interpolation in its default state.
 
It can also be useful to have that macro set the driver current before homing and set a new current after the carriage has moved away.
 
[gcode_macro SENSORLESS_HOME_X]
gcode:
{% set HOME_CUR = 0.700 %}
{% set driver_config = printer.configfile.settings['tmc2209 stepper_x'] %}
{% set RUN_CUR = driver_config.run_current %}
# Set current for sensorless homing
SET_TMC_CURRENT STEPPER=stepper_x CURRENT={HOME_CUR}
# Pause to ensure driver stall flag is clear
G4 P2000
# Home
G28 X0
# Move away
G90
G1 X5 F1200
# Set current during print
SET_TMC_CURRENT STEPPER=stepper_x CURRENT={RUN_CUR}
[gcode_macro SENSORLESS_HOME_X]
gcode:
{% set HOME_CUR = 0.700 %}
{% set driver_config = printer.configfile.settings['tmc2209 stepper_x'] %}
{% set RUN_CUR = driver_config.run_current %}
# Set current for sensorless homing
SET_TMC_CURRENT STEPPER=stepper_x CURRENT={HOME_CUR}
# Pause to ensure driver stall flag is clear
G4 P2000
# Home
G28 X0
# Move away
G90
G1 X5 F1200
# Set current during print
SET_TMC_CURRENT STEPPER=stepper_x CURRENT={RUN_CUR}
When using sensorless homing on CoreXY, make sure there is no `hold_current` configured for either stepper.
Bei Verwendung von sensorlosen Homing auf CoreXY, stellen Sie sicher, dass kein `hold_current` für die Stepper konfiguriert wurde.
If one wishes to reduce current to motors during print start routines, then consider issuing [SET_TMC_CURRENT](G-Codes.md#set_tmc_current) commands in a [START_PRINT macro](Slicers.md#klipper-gcode_macro) to adjust the current before and after normal printing moves.
 
The `[DUMP_TMC command](G-Codes.md#dump_tmc) is a useful tool when configuring and diagnosing the drivers. It will report all fields configured by Klipper as well as all fields that can be queried from the driver.
 
In addition, almost all fields can be modified at run-time using the [SET_TMC_FIELD command](G-Codes.md#set_tmc_field).
 
Then issue a `G28 X0` command and verify the axis does not move at all or quickly stops moving. If the axis does not stop, then issue an `M112` to halt the printer - something is not correct with the diag/sg_tst pin wiring or configuration and it must be corrected before continuing.
 

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User avatar NikTec

Translation added

  1. Klipper
  2. TMC_Drivers
  3. German
[gcode_macro SENSORLESS_HOME_X]
gcode:
{% set HOME_CUR = 0.700 %}
{% set driver_config = printer.configfile.settings['tmc2209 stepper_x'] %}
{% set RUN_CUR = driver_config.run_current %}
# Set current for sensorless homing
SET_TMC_CURRENT STEPPER=stepper_x CURRENT={HOME_CUR}
# Pause to ensure driver stall flag is clear
G4 P2000
# Home
G28 X0
# Move away
G90
G1 X5 F1200
# Set current during print
SET_TMC_CURRENT STEPPER=stepper_x CURRENT={RUN_CUR}
[gcode_macro SENSORLESS_HOME_X]
gcode:
{% set HOME_CUR = 0.700 %}
{% set driver_config = printer.configfile.settings['tmc2209 stepper_x'] %}
{% set RUN_CUR = driver_config.run_current %}
# Set current for sensorless homing
SET_TMC_CURRENT STEPPER=stepper_x CURRENT={HOME_CUR}
# Pause to ensure driver stall flag is clear
G4 P2000
# Home
G28 X0
# Move away
G90
G1 X5 F1200
# Set current during print
SET_TMC_CURRENT STEPPER=stepper_x CURRENT={RUN_CUR}
3 weeks ago
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Reset

Glossary

English German
PAUSE PAUSE G-Codes
SET_TMC_CURRENT SET_TMC_CURRENT G-Codes

String information

Flags
md-text
Source string location
docs/TMC_Drivers.md:block • 73 • (code)
String age
2 years ago
Last updated
11 months ago
Source string age
2 years ago
Translation file
docs/locales/de/LC_MESSAGES/TMC_Drivers.po, string 119