Thanks Dave. Somehow I missed that page on the shumatech web site.
That helps a lot.
I've got a DRO 550 that needs an enclosure and an overlay. But the DRO
350 itself is working just fine, all I need are scales that work too and
are compatible with the DRO.
Mark
On 5/8/22 15:13, dave engvall wrote:
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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