Incremental Encoder Lathe Automation

I have been working on a project to automate a manual lathing operation for our incremental encoder/optical encoder line.

To keep things simple, thumb switches allow the set point, along with some offsets for fine-tuning, to be entered.

I am not completely finished with project, but in the video below you can get a feel for how the machine will mill down the incremental encoder shaft.  We have control of the tool position to within .0001”

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The Versatile QD787 Optical Encoder

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This is a picture of the QDI Model 787 Hollowshaft encoder and a loose flex-mount showing the tabs bent 90 degrees for mounting to a surface larger than the diameter of the encoder.  The motor shaft would be inserted into the brass hub and tightened by two setscrews located 120 degrees apart.

Notice the groove in the housing of the encoder.  It is designed to allow infinite adjustability; allowing the technician to align the index pulse to a mechanical location on the machine used for homing or reference.  This is called an encoder “Servo Mount” and is intended to have “D” shaped washers used where after the alignment is complete, the larger diameter of the washer is inserted into the groove and screws tighten the encoder into place.  When mounting the encoder like this, the flex-mount is completely removed.

The housing of the encoder is made from Nickel coated, conductive carbon fiber that eliminates magnetic interference (EMI) generated by electric motors.  It is available in resolutions up to 2048 PPR or 8,192 quadrature counts per revolution (direct read) with index pulse being a standard feature.

Electrical output can be a Differential Line Driver for noise immunity via a ribbon cable with connector.

The QDI Model 787 encoder is about the diameter of a penny.

There are extended options that are not listed in the QDI online documentation for custom shaft lengths and diameters, making this encoder perfect for potentiometer replacement or other human interface applications.

QD787

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For more information on the QD787, check out the Spec sheets for both incremental encoder and absolute encoder varieties.

Download the printable versions of the spec sheets for the Absolute Encoder (PDF),  and the Incremental Encoder (PDF)

The Quantum Devices INC. main home page can be reached here.

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