[Coco] Re: Look what's on eBay / CGP-115 split gears

Kevin Diggs kevdig at hypersurf.com
Sat Oct 14 14:23:05 EDT 2006

KnudsenMJ at aol.com wrote:
> In a message dated 10/12/06 8:46:39 PM Eastern Daylight Time,  
> gene.heskett at verizon.net writes:
>>> Drill a hole in the centers for the shaft.  Place one on each face  of
>>>the broken gear.  Drill 4 small holes through the entire  sandwich and
>>>hold the whole thing together with small machine  screws with nuts.  This
>>>presupposes that you can find  appropriate hardware and that you have
>>>space within the plotter  for the extra thickness of the gear.
> This still doesn't guarantee enough friction between the original gear plus  
> metal splints, and the shaft itself.  Unless you under-drill the shaft  holes 
> and have a really hard press fit of the metal discs onto the shaft --  ugh!
> This  'gear' is only 1/4" wide & about 5/16th" in diameter, so this isn't  
> practical.
> Unless, maybe if 3 of your grandparents were Swiss :-)  Gene is right,  tho 
> -- little pinion gear is way too small for this fix.  --Mike K.
It also doesn't address the real problem:  the change in pitch where the 
split occurs. Mine bind when that tooth tries to pass the other gear.

You can add the printer for the TI CC40 to the list.

There are two of these in all these things:  one for moving the paper 
(platten?) and one for moving the pen carousel.

Given the number (i.e. percentage) of these that you find split, I think 
most will agree that they were designed/manufactured wrong.

The drill bit I was using doesn't seem to be removing any material. What 
kind and size of bit have others tried?


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