Re: Encoder's
Posted by
Dan Mauch
on 1999-07-09 06:52:11 UTC
I will try and find some picurrees of my enclosed US digital linear strips.
Essentially, it is a 1X2 rectangular aluminum tubing. I made end caps that
are inserted into the ends of the tubing and serve as a seal, a mounting
flange and a location stop.
The linear strip was mounted onto a pieces of 1/4" square aluminum stock
with 2 mill double sided tape. The strip is so light and with the rigidity
of the mylar there has been no problems with this technique after one year
of operation. The 1/4 stock with linear strip is epoxied into the 1X2
housing on one edge . Whereas there is no phyical contact with the encoder
strip epoxy is an easy way of securing the strip to the housing
The encoder head is mounted on a polypropylene slider that positions the
encoder head to run over the linear strip. The slider is moved by a piece of
5/16"D aluminum tubing that serves as a cable conduit and as a push rod for
the slider. The endcap on one side has a hole bored to allow the 5/16
pushrod to line up with the slider .
I think a picture of my encoder set up is in www.metalworking.com in the
drop box under droxencoder.jpg
Dan
-----Original Message-----
From: Brad Heuver <bheuver@...>
To: CAD_CAM_EDM_DRO@onelist.com <CAD_CAM_EDM_DRO@onelist.com>
Date: Friday, July 09, 1999 5:55 AM
Subject: [CAD_CAM_EDM_DRO] Encoder's
Essentially, it is a 1X2 rectangular aluminum tubing. I made end caps that
are inserted into the ends of the tubing and serve as a seal, a mounting
flange and a location stop.
The linear strip was mounted onto a pieces of 1/4" square aluminum stock
with 2 mill double sided tape. The strip is so light and with the rigidity
of the mylar there has been no problems with this technique after one year
of operation. The 1/4 stock with linear strip is epoxied into the 1X2
housing on one edge . Whereas there is no phyical contact with the encoder
strip epoxy is an easy way of securing the strip to the housing
The encoder head is mounted on a polypropylene slider that positions the
encoder head to run over the linear strip. The slider is moved by a piece of
5/16"D aluminum tubing that serves as a cable conduit and as a push rod for
the slider. The endcap on one side has a hole bored to allow the 5/16
pushrod to line up with the slider .
I think a picture of my encoder set up is in www.metalworking.com in the
drop box under droxencoder.jpg
Dan
-----Original Message-----
From: Brad Heuver <bheuver@...>
To: CAD_CAM_EDM_DRO@onelist.com <CAD_CAM_EDM_DRO@onelist.com>
Date: Friday, July 09, 1999 5:55 AM
Subject: [CAD_CAM_EDM_DRO] Encoder's
>From: Brad Heuver <bheuver@...>discussion of shop built systems in the above catagories.
>
>to: CAD_CAM_EDM_DRO@onelist.com
>
>I am planning on building the PC based DRO based off Tom K's software
>and Dan M's circuit board. Does anyone have any tips/tricks on the best
>way to mount the mylar strip and encoder heads in a protective frame? Is
>is best to glue them, clamp them, place them under tension with a
>spring, etc...? The encoder appears to have to enclose both sides of the
>strip, meaning that the strip has to be cantilevered out a bit, or hang
>down/point up. Is it rigid enough to do this unsupported? Any tips from
>those that have done this before would be appreciated. Also, the US
>Digital site mentions max length of the cables being a concern. With the
>design were using, is this still a concern? Should the cables be
>shielded in a particular way?
> I guess this would qualify as delurking...
>
>Brad Heuver
>Mechanical Sub-Systems fax 734-523-6052
>734-52-33480 bheuver@...
>
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