Don Stanley wrote: > Hi All; > Both my new Spindle DACs, fed through a USC, > only changes output in 1 volt steps. > > Is this normal? > > Any response appreciated. > Nope, it is an artifact of the way you must be converting spindle speed (S words) to DAC output. Here's some code from my univstep_io.hal file :
# set scale for 5000 RPM MAX and connect spindle speed to USC DAC setp ppmc.0.DAC8.00.scale 500.0 newsig spinspeed float linksp spinspeed <= motion.spindle-speed-out linksp spinspeed => ppmc.0.DAC8.00.value Note we are sending the speed as a float to the DAC value input, and scaling with 500 there. Assuming a 10 V maximum output = 5000 RPM, then the factor of 500.0 does the correct scaling. Jon ------------------------------------------------------------------------------ Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
