Ok I would suggest you change it so somewhere in the region of 2,000 on the dip switches.
How things are worked out is as follows. Your drive is saying 25,000 because of the dip switch setting, that is only true if you have a 1.8 degree stepper but it seems you do, so
25,000 x TPI and Gearing so for your example assuming no gearing that will be 125,000 steps per unit in Mach. That is quite a high value and you would need the kernel in Mach set to 100KHz to get your 40IPM. You are unlikely to get 100KHz kernel reliably and really 25 to 45KHz should be the range you aim for with a stepper system.
If you alter the dip switches on the drive so that they equal 2000 (if possible) then your steps per unit would be 10,000 and the kernel required would be 25KHz ( the lowest and most stable)
At the 2000 setting of your drive and using 26KHz kernel your max potential axis speed would be 150IPM. Note however this is just a potential number and you may not be able to achieve that but I am just trying to show that having the microstepping set very high is often not a good thing.
Hood
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