Y layer shift problems on A10M

[Newls]

Hi all

I have been using this printer successfully for a couple of months now and love it.
Recently I’ve started experiencing Y layer shift.

When I slide the bed I can feel a couple of spots where is sticks.
I thought I had a bum V slot wheel so I ordered some new ones and replace them with dual bearing wheels instead of the single bearing.
unfortunately I’ve still got the issue and the sticking spot is still there.

Can anyone recommend what to try next. I’ve bought a new driver to try and have a tmc driver is on the way.

I’ve tried loosening in and tightening the eccentric nuts too but the issue is still there.
I can't see anything obvious with the frame either causing the issue, so i'm really stumped.

People have mentioned about tightening the belt but does anyone had a guide on how to do this? I can't see anything obvious apart from taking off the bed and pulling the belt through the carriage.

Thank you for any help.

[wotor]

Check heated bed cable, my was sometimes catching Y stepper motor. Check vref on Y stepper driver maybe it's to low.
If you look online, you can find 3d printed belt tensioners for X and Y axis.
OT.
Will you provide link to dual ball bearing wheels?

[nyckel59]

Regardes sur ce lien.
http://www.geeetech.com/forum/viewtopic ... 98&t=61864
Bon courage.

[Newls]

Thanks for the replies.
I've already read the post about common problems. it's a really good post.
I bought these v slot wheels from Amazon:
https://www.amazon.co.uk/gp/product/B07 ... UTF8&psc=1

Anyone know what the best way to "Tighten the Y-axis belt"?
Or any good links to belt tensioners for the A10M

That's the only thing i've not yet tried.

[wotor]

I don't know if it's good but here you go: https://www.thingiverse.com/thing:3466397
And thanks for the link

[Newls]

Thanks for that link. I tried searching thingiverse but didn't see one for the A10. How did i miss this.

ALso with the V Slot wheels you'll likely need new screws as the current ones are slightly too short. I managed to get them to hold but i've only test printed with it. My plan was to get longer bolts. I'll dismantle the printer again today and check the size.

I'll also look to getting the tensioner printed too. (If i can get one without the shift)

[Newls]

I've just seen you can tension the y belt by loosening the screw on the frame and pulling the end piece forwards. This has made the belt tighter for me.
My build plate still catches in places and i'm doing a test print to see if the Y shift has gone.
I really want to get to the bottom of what's causing the build plate to stick in places.
I'll take a look over lunch and see what i can find.

[nyckel59]

Bonsoir.
Perso j'ai réglé le Vref au max (1.2v) et détendu la courroie, et j'ai toujours le problème. Je me demande s'il ne faut pas agir sur les accélération et le Jerk.
A suivre.

[Newls]

I've translated your response to:

Good evening.
Personally I set the Vref max (1.2v) and relaxed the belt, and I still have the problem. I wonder if we should not act on acceleration and Jerk.
To be continued.

I've tried reducing the Jerk down but i've not played with acceleration yet. I'm thinking the TMC drivers will solve the issue because they are much smoother and can cope with bumps in the rails better.

I may try upgrading the firmware to Marlin 2.0 as well. (*I'll need to do it before inserting the TMCs)

[Geeeko]

Using Cura 3.6 I got a lot of Y shifting issues... until I totally disabled acceleration and jerk in Cura settings. No firmware update, no hardware change, just disable that parameters and tada, no Y shifting.