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History of Stepper Motor Speed Limitations|
Let's start with a system with a standard 200 step per inch stepper motor running in full step mode. Let's choose a motor that will need 100uS per step if it is to maintain full torque. If it drives a 20 thread per inch allthread leadscrew, it will require 4000 steps per inch, giving ¼ of a thousandth of an inch resolution. This requires .4 seconds per inch, which is 150 IPM (inches per minute). If this motor is sized to provide a lot of torque for cutting, then when doing high speed moves, the motor can be driven faster, into the region where the torque decreases. This system in practice might be suitable for 300 IPM high speed moves without losing steps. For most hobby uses this is quite fast. |
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Let's start with a system with a standard 200 step per revolution stepper motor running in full step mode. Let's choose a motor that will need 100uS per step if it is to maintain full torque. If it drives a 20 thread per inch allthread leadscrew, it will require 4000 steps per inch, giving ¼ of a thousandth of an inch resolution. This requires .4 seconds per inch, which is 150 IPM (inches per minute). If this motor is sized to provide a lot of torque for cutting, then when doing high speed moves, the motor can be driven faster, into the region where the torque decreases. This system in practice might be suitable for 300 IPM high speed moves without losing steps. For most hobby uses this is quite fast. |