Gallery, Projects and General > Neat Stuff

Micro DRO made from tyre tread depth gauge

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John Rudd:

--- Quote from: kd0afk on October 08, 2012, 05:26:16 PM ---Just got a reply from Wixey
--- End quote ---

Nice to actually get a reply from a vendor......... :coffee:

kd0afk:
I'm putting something together for my south bend lathe. There are other sites out there dedicated to this concept and using the info from those sites I will be able to have a nice and fairly accurate dro with remote access and read out and it will be linked through a computer. I think the rail system that Wixey sells would be nice but covered with a length of aluminum c-channel would be better. Don't want svarf in the works.

BillTodd:

--- Quote ---I'm putting something together for my south bend lathe.
--- End quote ---

I had a set up like this on my old SB9 (even built the PC interface and DRO). It was OK, but the scales do not really have enough resolution for the cross-slide of a lathe.  :(

Although the scales read to 0.0005 which appears OK, this is the least significant digit, so it's actually no better than 1 thou" accurate. This error gets doubled on a cross-slide because you're cutting diameter so you could be ~2thou" out. 

Those cheap scales are OK on a drill/mill but you'll probably find them frustrating on a lathe.

Bill

kd0afk:
I have looked at some of the schematics and plans for a computer interface for these gauges and part of it is increasing the frequency or something like that so that it reads quicker. Couldn't a person also increase the precision electronically?

kd0afk:
I just got a second one in the mail. It's one of the black ones but it is nice. It holds it's reading after a power down so it has memory. I plan on getting a few more of this model on payday. Here is the link. http://www.ebay.com/itm/290703672736?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
I hope they are selling these out of a larger lot and that all of the ones they are selling are the same.

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