[BUG] No axes move with FT_MOTION

[vovodroid]

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

Yes, and the problem still exists.

Bug Description

No XY axes move with merged FT_MOTION : updating last_direction_bits for Core printer solves homing failure #26720

When FT_MOTION is enabled in menu no XY homing axis move happens.

Version of Marlin Firmware

[cron] Bump distribution date (2024-05-10)

Printer model

Cartesian

Electronics

SKR-3, TMC2209

Bed Leveling

ABL Bilinear mesh

Don't forget to include

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

Additional information & file uploads

Marlin.zip

[thisiskeithb]

Sounds like @narno2202 will be unable to help out for the foreseeable future, but @ulendoalex may be able to help troubleshoot.

[danbrianwhite]

I'm having a similar with the recent FT_MOTION PR merge. I am unable to home my core_xy printer with FT_MOTION enabled for build. If I disable it fully from build and comment out the feature, I can home and print properly.

I tried, with FT_MOTION defined for build. I tried both endstop and sensorless homing. I also tried with and without enabled by default without success.

When enabled/on, the core_xy printer homes moving the print head to the diagonal corner instead.of x/y only. It does not detect the endstop. When ft_motion used for build but disabled for homing, it moves properly straight to the endstop, but it is not triggered when pressed.

Thoughts?

[vovodroid]

I'm not sure whether it's the same issue or not. I have cartesian printer, and axes just don't start to move. But enabling FTM in build doesn't harm, only turning it on in menu.

[narno2202]

Hello guys, just few words. When @thinkyhead add @ulendoalex'scode in #26720, some code were missing, I corrected a few mistakes but it was incomplete. This PR was also buggy on my printer. Could you please give feedback on #26848. It's not the same code for endstops monitoring : last known working code of #26720 and other changes.

[vovodroid]

Could you please give feedback on #26848. I

Would you like me to merge your PR to bugfix-2.1.x and check? Or just take your branch?

[thisiskeithb]

Would you like me to merge your PR to bugfix-2.1.x and check? Or just take your branch?

thinkyhead has already merged in the latest bugfix-2.1.x and is fixing up other things right now.

[grizzleeadam]

I was just toying around with the latest Bugfix (from 5/19/24), and found that FT Motion seems to be working fine for me - so long as Adaptive_Step_Smoothing and Edge_Stepping are disabled. Either one of those seems to cause inability to move & crashing into the bed on homing. I'm on an SKR E3 v1.2.