Brand new to CNC routing

Just received my LongMill MK2.5 yesterday, finished setting it up today and downloaded gsender then followed the instructions to the carriage in all directions, worked great until I turned the machine off to finish final adjustments of the wheels.

When I turned the LongMill back on and open gsender I get one of two error messages.
One error says to check here to unlock the machine and the other (randomly) says to Home the machine. I have no clue to how to do either. Sorry for my dumb question but I’ve never run a CNC Router before.

Thanks.
Ed

@Jyuma Welcome to the group, Ed.

I replied to your other post as well. I strongly recommend that you read the tech manual for the SLB. You can find it here.

Also, read the manual for gSender.

What do you plan to use as your CAD/CAM application?

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VCarve Pro.

btw, the problem disappeared for 2 days but has returned today.