No. You realy need to figure out your max velocity through a bit of trial and error. You didn't say exactly how fast the PC is, but even a 486 should get you 8-10Khz.Originally Posted by fbmstar
Losing steps would usuually be more a function of motor torque (or lack of) than TurboCNC's frequency limit, which would just limit your speed, unless the pulse train gets rough near the limit.
First thing you do, is set your accel and start relatively low, and setup the Max velocity. This is your rapid speed. Do some rapid moves on your machine, while increasing the Max frequency until you notice your machine starts to lose steps. Once you find a max that seems to work well, back it off by about 20% for a safety margin.Originally Posted by fbmstar
Setting Start and Accel are done similarly, slowly increasing one at a time until you have problems, then again, back off Accel about 20%.
One thing to note, is that Start and Accel are somewhat dependant on each other. With a very low start speed, you should be able to use a much higher Accel. The downside to that is the machine will come to a complete stop between each move, Increasing the start speed can make the machine run a little smoother, at the expense of acceleration.
This is really machine dependant, and even identical machines might need different settings.Originally Posted by fbmstar