I use a CSMIO/IP-M, and it takes a little bit of work to get it set up for analogue speed output. I would like to see a measurement of the CSMIO output voltage at the terminals just to check that it is actually configured correctly. The CSMIO plugin for Mach3 has some settings that are not obvious (although if you work through the manual very carefully they are documented) and you have to get this right. You should see 0-10V coming out of the CSMIO when it is configured correctly. Quick check with a voltmeter will confirm whether the CSMIO has been set up correctly.