servo setup timing

10mm pitch would imply ballscrews, so spinning those at 1200RPM is not healthy at all for them, depending on diameter and length, they start whipping much, much earlier. Might want to look into rotating nut setup.
The timings are set in the ini file, so edit the ini file for each joint/axis to a lower value for step time and step space, leave the dir timings at 2000 as they do not hinder performance. You can test lower values till you notice skipped steps or change in motor noise, then double that value.

ihavenofish wrote:

Step time/space is 20000 as I said. Lower than that it misses steps out.
The question is is this a mesa, linuxcnc or a servo drive limitation.

Drives, definitely and undoubtedly.
Strange...
Both LinuxCNC and Mesa can do much, much shorter pulses.
I have cheap drives doing 3000 without issues, ever, in several machines with 7i92.
I have a 7i96 (not S) doing 600ns with very good drives.
I have several machines with parallel port doing 4000ns
So no, not a limitation of LinuxCNC nor Mesa.

Cr@p, almost forgot:
Very nice key caps
And try inverting the step output, on some drives it makes quite the difference.

You have them wired differential?
Yes, swapping the STEP leads should work, but it can also be done in PncConf.
You might also want to try wiring the drives single ended and do a test, some drives work faster with greater voltage swing.