3040T and Y axis shift

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27 Apr 2024 17:09 - 27 Apr 2024 17:17 #299198 by Lpkkk
3040T and Y axis shift was created by Lpkkk
Hi 
Some time ago I've upgraded my 3040. I've replaced all electronics and now I'm using hy-jk02-m bob + 4xTB6600. Stepper motors are still original Anchuan 57hd0401 1.8deg 2A.I've also upgraded spindle to 2.2kw driven by hy inverter. Only one Power supply for motors is 24v 20A. Currently I've got an issue with Y axis. I've tried to cut different size of squares in plywood. Everything went OK, after measuring difference was that small so I can take it as a measure error. In one of the tests I've cut 30x30 square and then I've tried to cut it diagonally. Unfortunately I've noticed shift during cutting in X+Y - direction. Because of that axis is shifted. I'm not sure what's is wrong. Mechanically I cannot see any issue with coupler or driving nut. I made a video from this test. Please have a look here :





Efect in attachment 
 
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Last edit: 27 Apr 2024 17:17 by Lpkkk.

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27 Apr 2024 22:01 #299211 by tommylight
Replied by tommylight on topic 3040T and Y axis shift
Barely can hear it over the spindle/endmill noise, but for sure it is there, steppers skipping, and from that faint sound seems like underpowered a lot, so what current are the drives set to?
And what microstepping are they set?

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28 Apr 2024 08:08 #299236 by Lpkkk
Replied by Lpkkk on topic 3040T and Y axis shift
At the beginning all of them were set to 2A current to match steppers. Then I set Y axis driver to 2.5A and that's what you can see on the video.Regarding microstepping I've set it up to 8. 

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03 May 2024 22:17 #299674 by Lpkkk
Replied by Lpkkk on topic 3040T and Y axis shift
We can close this one...
I ended replacing stepper on Y axis
Now I've got nema23 3nm closed loop, and no more issues. No maybe just one, not enough space in my cabinet. I will need to buy something bigger, cause in future I will replace stepper on x axis + separate power supply.

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