X/Y axis squareness and stepper calibration

X-Carve Troubleshooting
1

Hello everyone,

last week I finished re-assembling my 1000x1000 X-Carve and did some test cut today.

I’ll try to explain the better as I can: I have cutted a guitar neck template profile and all seem to be accurate except for the lenght. The template should be long 665,4/5mm but it’s actually 664,4/5mm.

While I have re-assembled the machine I checked the wasteboard squareness (it wasn’t square before) and now seem to be accurate 135.4/5mm in both diagonal.

I also re-done all the wiring, and re-checked the V-Wheels and Eccentric nut. Made the 30 minutes X axis stiffening.

Calibrated the stepper: Now on a 600mm line I have 599,99mm.

But I still can’t figure how those template are always a mm short than they should be. Also cutting a square, seem to be not exact square and not about the correct dimension!

Any thoughts or tips? Could the X axis be not perpendicular to the Y axis? I found that pic “stolen” from @AlanDavis while seems that he had an X to Y axis square problem too (if is my case).

I’m near to have the machine working like I want/need and this is so frustrating!

Thanks in advance!

2

Check out this thread and the calibration video that Robert posted.

3

I talked with Robert many times, I also followed his video for stepper calibration and other things.

As I said above, if I cut a straight 600mm line for example with a 0.5mm bit it turn out exactly 599.99 which is quite perfect I assume. But, if try to cut a complex template, general dimensions look nearly perfect, just 1.2/4mm shorter than it should be.

I also have the square problem, if I try to cut 50x50m square it turn out 49,60x49.70 pretty much. Of course also circle are a little bit oval

5

I have setted all the pot near the max power, do you think I’m loosing micro-steps?

6

Well, better to say just a little below the thermal shutdown

7

if your circles are still coming out slightly oval, yes you are losing steps.

8

Same thing for the square? But why they are not of the correct lenght? Is possible that I have the X axis not squared to the Y axis?

9

Anyway I’m more than sure that I can’t get more power from the pot because they will go in therman shutdown

10

belts and wheels. I swore up and down I had my belts right.

my belts were not right.

11

In fact I setted them “by ear”, I don’t know any reliable method to set the belts

Wheels. What could be? Too loose?

14

I don’t understand that, sorry. Are you saying that I have setted the pot with too much power? Because before setting them I have REALLY loosing step problem.

I don’t have to touch the Z pot? Because I added a little more power to it too

1 Like
16

Hi! I will do that again, no problem.

Anyway I noticed this morning that my X axis is a bit not square to the Y axis, do you think Alan Davies solution will solve my problem? Without saying that i have to re-check both Y axis V-Wheel that seem a little bit loos on the right side