Extruder motor skipping steps and loud clicking
Hello,
This is my first time to use Repetier Firmware.
When testing the extruder motor without hot end and cold end, it starts smooth with the first couple of tests and then starts skipping steps in a pattern. The motor current rating is 1.68A, started with 70% of max Vref and readjusted it to max Vref 0.67V. it was attached to hot & cold end but the problem exists in all conditions. I feel like it is a firmware setting that I need to adjust but I am lost. The board is RUMBA and driver is A4988
Please lead me to the probable reason and how to solve it.
I couldn’t uploade a video here, so it is on youtube
This is my first time to use Repetier Firmware.
When testing the extruder motor without hot end and cold end, it starts smooth with the first couple of tests and then starts skipping steps in a pattern. The motor current rating is 1.68A, started with 70% of max Vref and readjusted it to max Vref 0.67V. it was attached to hot & cold end but the problem exists in all conditions. I feel like it is a firmware setting that I need to adjust but I am lost. The board is RUMBA and driver is A4988
Please lead me to the probable reason and how to solve it.
I couldn’t uploade a video here, so it is on youtube
![](https://img.youtube.com/vi/BtEwHLsnD-c/0.jpg)
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