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Old 23-08-2018, 04:14 PM
Rob Hamlin
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Rob Hamlin is offline
 
Join Date: Nov 2009
Location: sydney
Posts: 25
Belt and Timing Pulley Robofocus Setup

Dear All

Im wading into a project involving automating focus using a robofocus unit for a canon eos lens.

The shaft diameter of the robofocus is 6.3mm however im finding that many of the timing pulley bore diameters are either 6mm or 8mm

When choosing the belt ive measured an appropriate timing belt length to be about 450mm - all good.

However im having trouble matching the tooth of the canon lens teeth, the timing belt and then the pulley.

Anyway, if theres any feedback/ experience in selecting the appropriate parts feedback would be greatly appreciated

With thanks in advance

Rob Hamlin
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Click for full-size image (belt and pulley arrangement.jpg)
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Click for full-size image (lens grip profile characteristics.jpg)
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Click for full-size image (motor shaft for pulley diameter.jpg)
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