Indeed, it is an interesting approach.
http://www.shumatech.com/support/chinese_scales.htm#Scale%20Connector
It may be time to dig out the scope or to upgrade to newer scales and
readout.
If the glass scale is very good then it is probably worth the fuss ...
else....
The chinese scales I got were good but not nearly as good as the
accu-rite 150.
I've not been able to make the chinese scales play nicely with an
accu-rite readout.
So I did the whole shebang in chinese as a manual readout X, Y, Z for my
mill. Before I removed the X accu-rite scale I checked it at 1 inch
intervals against the handwheel for the ballscrew.
This is a 1963 Cinci tracer converted to cnc and at this point back to
manual. The handwheel checked to 0.001" re the digital display.
Clearly YMMV. Best wishes.
Dave
On 5/8/22 7:59 AM, Mark wrote:
Hi All,
I've got an elderly Shumatech DRO-350 and was using it this past week
and the read head on the X axis of my mini mill decided it was time to
give up the ghost. I ordered what looked to be a drop in replacement
but when it arrived, I noticed it had a mini USB connector as it's
data port. The old chinese scales used a plug that had four sprung
strips that lay against four strips in the reader head. I'd been using
a cable I got from Little Machine shop years ago that had that plug on
the scale end, and a 4 pin mini DIN connector on the other that
plugged into the DRO-350. Attached is a picture of the connection
lines. Wondering if anyone knows what the pinout for the mini USB
connector on the scale would be and if it would match up to the lines
pictured below on the mini DIN. If so I can cobble together a cable
that has the mini DIN on one and a mini USB on the other.
Thanks,
Mark
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