We need to push a large load (2 tones) using two stepper motors, connected rigidly to the axis (two screws).
I'm worried the motors could micro-step out of sync. And cause malfunction.
I can see 3 ways to approach the problem - mechanical, signal sharing, parallel line connection.
Mechanically, I can sacrifice some rigidity, and allow lower stiffness connection to compensate for the micro-step error. This can be a lever allowing to distribute the loads equally too.
Signal sharing - two controllers sharing the dir and pull commands from one source. As I see it, this is vulnerable to signal noise. If one wire for some reason gets some induction current or connection gets loose / spark. Motors are powerful, large magnetic fields.
Power drive sharing - parallel connection of coils. One controller, driving two motors in parallel. There the motors could have slightly different torque. But voltage is high, so low noise. Should drive both motors at the same time - as long as the load is similar on both, and one doesn't suck power out of the other one.
Any thoughts, experiences? Especially regarding real life attempts, observed glitches - in parallel servo connection methods.
Dear Tomas,
The first thing to achieve mechanical synchronization is to operate the two motors from the same electric source. It is required also that you make same wiring with tight tolerances for the two motors. Also you need to choose the two motors with very tight tolerances. In this way they will move as if they are one motor. This may be one of the best solutions.
Good luck
Dear Tomas,
The first thing to achieve mechanical synchronization is to operate the two motors from the same electric source. It is required also that you make same wiring with tight tolerances for the two motors. Also you need to choose the two motors with very tight tolerances. In this way they will move as if they are one motor. This may be one of the best solutions.
Good luck
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