There is huge probability that your board's plugin is unsupportive that line of code: ZProbePos = GetVar(2002) 'get the exact point the probe was hit This is the GetVar command and am afraid that most Chinese machines don't work with it.
Hello, It could be a lot of things. Please post the list of all the specific electronics you use in your operations explaining to us how they are are wired. That will give us a clearer picture of where the problem is originating rom.
if doubling the movement speed would be the desired outcome the table would have to move in both x and y directions. You could do it but why? why not just size a drive system to attain the desired speed?