Re: [CAD_CAM_EDM_DRO] Axis Creaking - Finding a belt

Roger,
If you go into the McMaster-Carr web site, www.mcmaster.com , and do
a search on "Timing Belts", it will give you instructions for sizing the
belt. It's a combination of the pitch (distance from center of tooth to
center of the next one), circumference, number of teeth, and width. They
have every size imaginable.

Marv Frankel
Los Angeles

----- Original Message -----
From: "vrsculptor" <vrsculptor@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, October 17, 2002 1:19 PM
Subject: [CAD_CAM_EDM_DRO] Axis Creaking - Finding a belt


> My X-axis on the mill has started making creaking shuddering noises
> when it starts and stops. Its not stick slip as it moves freely with
> the hand wheel. When this shuddering noise occurs you don't feel it
> through the table. The servo drives the axis screw with a cog belt
> reduction and the encoder is coupled directly to the ball screw. The
> belts are probably 10 years old and look pretty beat. Some of the
> cogs are missing little chunks.
>
> I have no idea what pitch they are as they came with the machine. The
> manufacturer (Tree) wants about $50 a belt. They are about an inch
> wide by about 18" and I don't see any markings. Can I take them to
> Gates part counter and ask them for a replacement or am I going to
> have to figure out what I've got and order it from somewhere? How do
> you go about identifying a belt?
>
> Roger
>
> PS. Just ordered the Visual Mill/Alibre bundle. I chose Alibre
> because it claims to be parametric. Hope they are more user frienly
> than Mastercam and a lot of the others I've seen.
>
>
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