Re: Need someone that has a bigger brain then me to help me calculate gearing.
Originally Posted by
Kristjan1505
Hi all .,
Stepper motors... Faster they go , lower the torque
BUT , and here it comes BUT , if one would gear up his steppers ? what happends with torque ?
if im running my steppers on 100 procent speed , i might be getting 5 procent torque , if i then run my steppers on 10 procent speed and getting maybe 90 procent of my torque and gear up lets say 1:9 with a gear on my stepper and a gear on my ballscrew.. Will i still have torque ???
Can someone try and explain how all this works in laymans term so i might have a chance of understanding it , and just maybe also learn a bit about it
..
Thanks in advance
Kristjan
Simply put.
They only lose torque due to the increased inductive reactance as rpm increases, this results in a reduction in current, so the secret is, is to use a method in order to maintain the plate current as close as possible.
Originally this was done with a simple series resistor, but modern drives use a voltage much higher that the plate voltage of the motor, and use this voltage, in order to Maintain the required current throughout the RPM range.
Steppers should ONLY be ran at the manuf. plate current and no other.
CNC, Mechatronics Integration and Custom Machine Design
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