[BUG] Wipe location for Taz Workhorse and Taz 6 is nowhere near the pad location

[wrathernaut]

Did you test the latest bugfix-2.1.x code?

Yes, and the problem still exists.

Bug Description

A change for the toolhead code completely changed the wipe location for the Taz Workhorse and Taz 6 from the front-left wipe pad location to the rear-center of the build plate, where no wipe pad exists. This position (X115 to X160, Y297.5) does not align with the wipe pad location of any released printer.

The working code in configuration.h was:
#else
#define NOZZLE_CLEAN_START_POINT { -17, 95, 0 }
#define NOZZLE_CLEAN_END_POINT { -17, 25, 0 }
#endif

and was changed to:

#else
#define NOZZLE_CLEAN_START_POINT { 115, 297.5, 0 }
#define NOZZLE_CLEAN_END_POINT { 160, 297.5, 0 }
#endif

The change appears to have happened during this commit: 9d7fcd5#diff-bb298d18dac4268225a7a53a5ad24844472530bdc63f6a98a2ba8d8158b75080

Bug Timeline

New bug, but seems to have gone unnoticed. Change in code was introduced in Jan 2024.

Expected behavior

Wipe on pad

Actual behavior

Wipes on nothing at the rear of the build plate.

Steps to Reproduce

Run nozzle cleaning code (G12) on Taz Workhorse or Taz 6

Version of Marlin Firmware

2.1.3.0.29

Printer model

Taz Workhorse

Electronics

Stock Board

LCD/Controller

Stock LCD/Controller

Other add-ons

M175v2 Toolhead

Bed Leveling

ABL Bilinear mesh

Your Slicer

Other (explain below)

Host Software

Cura

Don't forget to include

• A ZIP file containing your Configuration.h and Configuration_adv.h.

Additional information & file uploads

Using latest (stable) CuraLE 4.13.10, with included workhorse firmware - 2.1.3.0.29, but more current builds have the same wipe position.
Configuration_(unmodified).zip

[cdsmith69]

Are you doing a G12 with paramaters, like maybe "G12 P0" ?

If you use a G12 with no parameters, it doesn't use those coordinates. Instead it should use the WIPE_SEQUENCE_COMMANDS gcode string about 30 lines down from there.

The NOZZLE_CLEAN_START_POINT and NOZZLE_CLEAN_END_POINT coordinates are only used if you do a G12 with parameters. If you slice a model with Cura LE, the start gcode has a G12 with no parameters, and it wipes in the left front location. This is why this has gone unnoticed.

I have added those original coordinates back into the code for Workhorse and TAZ6 on our development branch. I tested that a G12 P0 command wipes in the left front location now on a Workhorse with SE tool head. I did not test TAZ6 as we have not tested or released new firmware for the TAZ6 since 2.0.9.0.13.