cumulative X, Y, and Z errors - <resolved>

[cnckeith]

what type make/model of axis motors/drives and how are they wired?

[tblough]

This looks like a classic case of loosing steps, either from noise, or overdriving the steppers.

[cnckeith]

This looks like a classic case of loosing steps, either from noise, or overdriving the steppers.

yep! i want to see what make model and how they are wired.

[JPT]

The stepper drives are Yako YKA2404MA

The data sheet is attached with highlights on the switch settings and the model.

YKA2404MA_B - yakotec.com-data-sheet-OCR-highlighted.pdf

(1.14 MiB) Downloaded 4 times

[JPT]

The stepper drives are wired via Centroid-provided shielded cables from the Acorn DB25.

Cable:
https://shopcentroidcnc.com/shop/cnc-ac ... der-cable/

[JPT]

This looks like a classic case of loosing steps

I wouldn't know about classic, as this is only my second Centroid retrofit, but my first thought was the steppers losing steps.

What I couldn't get past with noise as the culprit is the exact duplication of the cumulative X & Y errors on each Z height.

I ran two test parts and the stair steps were identical on each.

If it was noise, I would expect random errors, not repeatable errors.

[JPT]

overdriving the steppers.

If you are referring to the stepper drive current, the stepper drive current setting has not been changed for any axis.

[H.C]

smoothing on ? turn it off. (another classic )

Not sure with a rectangle, but if you cut a simple circle in few depth steps with smoothing you get something similar.

(have no idea how to read those report's)

[tblough]

Overdrive means asking your motors to deliver more torque than they are capable of either by too fast acceleration (or deceleration), or pushing too hard in a cut.

There Is also the possibility of a mechanical problem like a coupling slipping under toque.

[JPT]

Overdrive means asking your motors to deliver more torque than they are capable of either by too fast acceleration (or deceleration), or pushing too hard in a cut.

There Is also the possibility of a mechanical problem like a coupling slipping under toque.

Thanks for the clarification.

The error measurements in the XL screenshot were air cuts.

The programs used for the error tests are attached to the first posts in this topic.

The acceleration on all axes is set to 0.5 second.
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The mill is capable of 2,000 mm/m and 1,000 mm/m and for rapid and feed rates, respectively.
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benchmill-6100-data-sheet-35-1006-7400_DS_HW_BenchMill-6100_Ver_M.pdf

(527.88 KiB) Downloaded 1 time