Z and y axis just bumps

Longmill MK2 30x30. Z and Y axis just bumps when clicked on with block symbols.

Hey Jim,

Welcome to the forum. Your post is a bit low on info and it confuses me. Did you just assemble your beast, are you using gsender, what does bumping mean and what symbol do you mean?

Do the motors on the axis turn while your z and y axis bump and stay stationairy? Does it make a nasty sound while your axis bump?

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