1 Topic by petra2201

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Topic: Print pausing and then shifting forward or backwards, solidoodle 3

I replaced a stepper motor chip on my solidoodle 3. Now every print job I've tried completes about 10-15 layers and then pauses for a second then then shifts either forward or backward and continues printing. I tried an update to the firmware that was available but it doesn't help. It would occasionally do this before I replaced the chip but now it's every print. Any ideas?

2 Reply by Hazer (edited by Hazer 2013-10-18 02:15:51)

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Re: Print pausing and then shifting forward or backwards, solidoodle 3

Vref is set too high. The motor may be pulling too much current, and the pause may be the chip shutting down temporarily.

Maybe try putting a fan on the chip too.

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3 Reply by petra2201

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Re: Print pausing and then shifting forward or backwards, solidoodle 3

It seems to be tied to the vref. I'm chasing down adjustments.

4 Reply by casey

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Re: Print pausing and then shifting forward or backwards, solidoodle 3

I'm having this same issue - but my voltages are dialled in exactly as detailed in the troubleshooting guide:

Proper Voltages
X axis: .443
Y axis: .520
Z axis: .500
Extruder: .192

5 Reply by casey

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Re: Print pausing and then shifting forward or backwards, solidoodle 3

petra2201 wrote:

It seems to be tied to the vref. I'm chasing down adjustments.

Any luck fixing this?

I'm going to try over and under-ramping the offending Vreg chip tonight, see if it makes any difference. Maybe strap a fan/tiny heatsink onto the electronics too.

6 Reply by petra2201

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Re: Print pausing and then shifting forward or backwards, solidoodle 3

I fixed it by bringing all the voltages down to 0 and then bringing them up untill the stepper motor would move. I then had to adjust the z stepper motor a little more because it wasn't stepping far enough and was messing up prints. So far it's done pretty well.