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Old July 13th, 2005, 06:25 PM   #12
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Leadfoot is offline
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Join Date: May 2005
Location: Red Stick, Cajun Land
Posts: 577
As a J7 has been specified as the VFD in use, an encoder is not an option. Neither is torque control.

You could use encoders on the motors and feed a CONTREX "M-TRIM". The M-TRIM has the ability to make the B lead the A by a given amount and track nicely. Getting the panel mount unit comes with its own HMI.

Contrex used to be called Fenner.
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