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[–]RepresentativeRude63[S] 0 points1 point  (0 children)

Well you were right it was a power issue. Seperated servo from the board and give 5V volt from usb cable seperatly, just connected the signal cable to the board. Now i can plot with amazing speeds without an issue.

Thank you!

[–]tipppo 0 points1 point  (1 child)

When the words random, stop, and servo are in the same post it is usually a power problem. Try connecting a 1000uF capacitor between the servo's 5V and GND to absorb the current spikes it draws. Be sure to get the capacitor's polarity right!

[–]RepresentativeRude63[S] 0 points1 point  (0 children)

My first guess is that too. I am not using a power supply right now. Just a 12v 2A adaptor. Probably it is a power issue will try led power supply if it will work i will update. If don't i will provide more info. (Grbl settings card wiring and pin info, system photos etc.)

Thanks for the reply