Roger Swift wrote: > Jon, > The mill is larger than a Bridgeport. Its a 7,000# Tree Journeyman 300 with a > 12X26X6 envelope and a 500# part capacity. The motors, reduction (about > 2.5:1), > ball screws and encoder counts were not changed in the conversion to Mach3. > The > original amps, servo dynamics, were rated for 20 amps continuous and 45 amps > surge. The machine works OK with Gecko's but is dreadfully slow. Mach3 has an > excellent CV algorithm that almost entirely eliminates corner rounding even > for > slow axis and acceleration. > > OK, so your problem is not acceleration but speed. Let's do some simple arithmetic to see what is going on. Assuming a 5 TPI ballscrew and 2.5:1 reduction, then you would need 1250 motor RPM for each 100 IPM of movement. What speeds are you being limited to? You might be limited by the step pulse rate your computer can produce, not the motor/drive/power supply combination. What is the volt/RPM rating of the motors?
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