Gear Distortion

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Gear Distortion

Post by gperzel » Tue Jul 22, 2014 4:12 pm

Hi Gang;
I am cutting gears on my Shapeoko 2-using Aspire for the gcode from a dxf file. See pic below and notice the distortion of the gear teeth which varies around the perimeter of the gear. Any ideas what causes this? I am going to do the same gear in Makercam and use the Universal Gcode pgm to see if it is different.
Thanks for any help.
Best Regards,
Gear1.jpg (9.54 KiB) Viewed 792 times

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Re: Gear Distortion

Post by WillAdams » Tue Jul 22, 2014 4:37 pm

It looks like you're losing steps along one axis (or both?) --- you can check this (assuming the photo is square) by drawing concentric circles. Also note the gouges at the spokes.

Check your belt tension and ensure that your pulley set screws are set.
Shapeoko 3XL #0006 w/ Carbide Compact Router w/0.125″ and ¼″ Carbide 3D precision collets

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Re: Gear Distortion

Post by aarvidsson » Tue Jul 22, 2014 5:10 pm

I can add one more thing that might look like that: a loose idler. That bit me once, and it took me a while to figure out why a cut that worked just fine suddenly go off the rails without any obvious reason. It might be difficult to tell if the idlers are loose as they are held fairly tight by the tightness of the belt.
ShapeOko 2 #4143

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