Tuesday, December 05, 2006

 

Pencil holder assembly...

Thanks to a timely pointer from Adrian about weighting instead of spring mounting my mechanical pencil I now have an operational pencil tracing device.


Now to set up some formal grid tests so that I can get an idea of just how repeatable my cartesian positioning system is. I've already detected what appears to be non-isotropic behaviour of the gearboxes with respect to rotational direction. It's not a big difference with you can see it now and thanks to Adrian I know it's not some duct tape artifact. :-D

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