Using a diamond drag bit with an excarve pro

hi guys,
I have an excarve pro 4x2 machine and would like to try some engraving on some brass trophy plaques. My question is how can i prevent the spindle from turning to do this operation or do i run it at slow rpm.
thanks Rodger

Youd have to unplug the spindle if yoh want it off and able to freely rotate.

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Hey Rodger, did you ever give this a go? Was it a success? How did you set up the bit in easel? if that’s what you used?