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« on: February 24, 2008, 10:05:55 AM »
So I think I have this ipm thing figured out with out a load I can easily get 600 rpm out of my motors. The problem is because with higher rpm I have less torque. Since my x axis linear bearings are not the best it takes a lot of torque to drive them. My motors are stalling because they don’t have the needed torque at higher rpm. So I see I need to fix two things to get higher ipm with my machine. One upgrade my x axis (parts are on there way) and increase my voltage. Now I need to come up with a 30 volt power supply at 5a with out breaking the bank. If any reader knows of a good source for power supply like this please let me know.
Also I have a question about how torque falls off with higher rpm’s. For example if you go from 50 to 100 rpm is the torque decreased by half. Or is the fall off expediential. An increase from 50 to 100 rpm decreases torque by lets say three quarters.
If toque does fall of expediential then replacing my 10 tpi lead screws with 5 tpi lead screw would increase my ipm speed with out halving my force at the cutting tool. Is this a correct assumption?
Dennis.
I will figure out my microstep when I get back out to my shop. Does how microsteping is set up change the amount of torque with these motors?
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