Broken Couplings
Vol.21 #1, June 1994
If you have problems with broken couplings between DC motors and tachometers, try switching to a stiffer coupling.
It is possible for the combination of the rotational inertia of the tachometer and the torsional stiffness or the coupling to result in a torsional natural frequency close to the frequency generated by the firing pattern of the DC drive's SCRS. When this happens, the coupling can be destroyed very quickly.
See also:
- DC drive failure
- Drive motor start up
- Motor overheating
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