Solved 3.4b4 and 3.4b5 – issue with sensorless homing
I updated today my 2 CoreXY to 3.4b5 from 3.4b3 and immediately noticed that the sensorless homing is not working anymore on both printers.
I rolled back to 3.4b3, it works; Installed 3.4b4 is doesn’t work.
I checked the change log for b4 and b5 but I haven’t noticed any changes related this issue; I have also not found any post related
- Duet 3 6HC + 1LC (v1 on the first printer and v1.1 on the other)
- Steppers 1.8 on the first printer and .9 on the second
- both 24v
When I try to home X or Y it seems the stall detection is triggered immediately – there is no movement in the X or Y max (these 2 printers home on X/Y max).
I can do a quick video if unclear.
I have attached the different files that might contain useful details from the printer with the 1.8 steppers.
I haven’t tried yet to adjust the settings to “fix” the issue, I will likely spend some time later.
Let me know if there is any adjustments or test you would like me to do.
@fred-y I have one other report of a similar issue. My own CoreXY running 3.4beta5 is working with sensorless homing. I had to increase the M915 S parameter by 1 recently, which I thought was because I changed the control board; however I changed the firmware to 3.4beta5 at about the same time.
I will investigate whether there was a change between beta4 and beta5.
@dc42 Thank you for the prompt response.
To clarify, the issue started to happen on beta4 and is as well on beta5.
I did a quick test and I bumped the M915 S parameter gradually from 10 to 60, it didn't make any changed - Same with lower values which makes sense as it increase the sensitivity but I wanted to try.
I have also increased the current (M913) up to 100 it has not make any difference.
I even pushed the carriage to "help" and unfortunately the result is the same.
If I execute a macro with this code
G91 G1 X20 F1200 H2 G1 X-20 H2 G1 Y20 H2 G1 Y-20 H2 G90
each motor moves individually and smoothly.
@fred-y please try the new binary at https://www.dropbox.com/sh/xeu30go894p9xbs/AAB5U66SH4wbjKIcX0snUbKxa?dl=0.
@dc42 Good news, I loaded this version on my 2 CoreXY and sensorless homing is working like before with the original parameters
I will try to run some prints on them today / this weekend and report any issue found.
@dc42 I think this topic can be flagged as resolved, I did many small prints today and I have zero issue - Everything worked perfectly!
Thank you for the prompt fix!