Gentlemen, I am working on a project on the Enshu. I am not sure how valuable it will be but I sure want to try it. I want to tap threads using the MPG. The spindle drive is a full servo. The spindle motor has a resolver for feedback to the spindle drive. The EMC2 DAC signal to the spindle drive is +-10V. I have found a quadrature signal out of the spindle drive. This spindle drive uses the resolver feedback to generate this quadrature signal (A and B). The spindle has a prox and amplifier that feeds a signal into a daughterboard on the spindle drive for spindle orientation during tool change. The daughter board has a pin that outputs a pulse once per revolution corresponding to the radial position of the spindle. I intend to use the A and B as encoder feedback into EMC and the orientation pulse as an index pulse into EMC. This will allow full servo control of the spindle as a C axis. I would like ideas on the best way to implement this. I would like to have the spindle set up as a C axis but without a C axis display on the screen (unless I am using the C axis as an actual C axis but that is another project). I don't think I NEED any display for the spindle for this project. I think I would like to be able to command a G code to engage the spindle and an F code for feedrate to move the C and Z in a coordinated fashion. Maybe I am thinking backwards. Maybe driving the Z axis with the MPG and the C (spindle) coordinated with the Z is the best way. Since I am thinking 'manual' then maybe a button is better than a G code. If I had a button how would I tell the machine the pitch of the thread? Maybe a screen display like the FO/SO/MV displays. This would adjust in proper increments per the chosen units and allow the MPG to set the pitch prior to engaging the coordination button. thoughts - comments - ideas thanks Stuart
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