RE: [CAD_CAM_EDM_DRO] PIC DRO stupid question #2

-----Original Message-----
From: Jon Elson [mailto:jmelson@...]
Sent: Thursday, April 06, 2000 10:42 PM
To: CAD_CAM_EDM_DRO@egroups.com
Subject: Re: [CAD_CAM_EDM_DRO] PIC DRO stupid question #2

>Generally, the scales can be cleaned, if only oil has gotten in. Some
>will handle some water, too. But, abrasive grit will wipe out most of the
>optical scales. Since the main grating is the most expensive part, it is

not >very likely one would replace the scale, only.

The spar and glass are the least expensive parts of the total unit. The
encoder is most costly since it has all the electronics, casting and
precision carriage.

>But, I'm sure Teledyne/Gurley and Heidenhain would sell the spar and
>scale as a unit, and you supply the remaining pieces from your old
>unit.

They will not under normal conditions. They is very little profit in a spar
and scale and not really worth the paperwork involved.

>But, you'd get no warranty that way. I suspect there are graveyards of old
>scales in machine rebuilder's shops, but they may be unwilling to let them

go.

Most do not have a clue what they have or don't have in their stock.

>Jon

Tim
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