Strange ripple on only x axis January 05, 2016 02:37AM |
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Re: Strange ripple on only x axis February 22, 2016 12:38PM |
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Re: Strange ripple on only x axis February 22, 2016 12:58PM |
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Re: Strange ripple on only x axis March 22, 2016 01:53PM |
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Re: Strange ripple on only x axis March 23, 2016 05:09AM |
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Re: Strange ripple on only x axis March 23, 2016 07:22AM |
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Re: Strange ripple on only x axis March 23, 2016 08:45PM |
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It works because it increases impedance of the motor which reduces current build-up. I think the explanation provided in the link is not correct. The driver does a closed-loop control scheme but not a common mean-current-PWM.
Re: Strange ripple on only x axis March 23, 2016 10:07PM |
Registered: 9 years ago Posts: 1,873 |
Shame, but consistent with not getting an improvement with A4988 either.Quote
Kev0
Made the diode mod.... no changes. Must be something mechanical.
Quote
If you say of center, do you mean exentrical on extruder shaft or not aligned with the PTFE?
btw tge diodes reach easy 60-70°C... normal?
Re: Strange ripple on only x axis March 24, 2016 04:04AM |
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Re: Strange ripple on only x axis March 24, 2016 11:23AM |
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Quote
Kev0
As seen its not related since the effekt doesn't take place on straight lines.
Re: Strange ripple on only x axis March 24, 2016 11:31AM |
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Re: Strange ripple on only x axis March 24, 2016 04:12PM |
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Quote
the_digital_dentist
Try wiggling the extruder/carriage and the build plate. If either will move it is liable to be such movement caused by sloppy bearings or flexing guide rails/printer frame that causes the ripple. It doesn't have to move much to have an effect on the print. That pattern occurs where X (or is it Y?) is accelerating/decelerating. What is the microstepping ratio? How fast are you printing and how much acceleration are you using? What is the power supply voltage for the motors? How much motor current are you using vs what are they rated for?
Does the ripple pattern appear in a flat surface like a cube or only a curved surface?