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Bob Baisden
08-17-2004, 08:15 AM
Hi,

I'm thinking of buying a dro from this site: http://www.candomachinery.com/dropricing.html

On the three axis kits, is it better to get the 3rd axis scale on the quill or knee?

I leaning to Newall kit. Uggh, I'm starting to get more$$ in the accessaries than the whole machine. :lol:

Thanks,
Bob

WarrenInDe
08-17-2004, 08:46 AM
I have one of these on my lathe. There is also lathe and mill version.

You buy the board from him and assemble it yourself. Mine went together very well. If your not into soldering there are also people on the Yahoo group that sell them pre-built and tested.

http://www.shumatech.com/products/dro-350/index.htm

http://www.shumatech.com/products/dro-350/images/dro4_small.jpg

There is also a very active and helpful Yahoo group at http://groups.yahoo.com/group/ShumaTech/.

The designer, Scott Shumate, is a engineer at Cisco (http://newsroom.cisco.com/dlls/innovators/switching/scott_shumate_profile.html).


Warren

Bob Baisden
08-17-2004, 10:09 AM
Hi Warren,

Thats really cool. I didn't realize there was such a kit.

thanks
Bob

r.w.dewar
08-17-2004, 12:05 PM
You could also check out www.star-techno.com . I haven't used their product, but, they have been around for awhile. Bob.

BigBadBob
08-17-2004, 12:30 PM
I would put the 3rd axis scale on the knee because you get much
more precise movement with the knee. It's very hard to move the quill just a few thousandths and keep it there.

BigBadBob AKA Bob Schutte

Bob Baisden
08-17-2004, 01:01 PM
Hi BigBadBob

Thanks for the info! I'm just learning this machining stuff, I appreciate the tips.

Thanks
Bob

Brian McCollim
08-17-2004, 02:21 PM
Bob, I have used the dro on the knee and on the quill. What you want would depend on what kind of work you are doing and depends also on the machine you are using. IMHO,For general home shop stuff, you can do very precise work without a dro, just depends on setup. For myself, I would choose to put it on the knee as you will gain some extra z axis travel as opposed to the quill on most machines.
The Newall brand is a very durable ro the encoders are encased in an aluminum tube and I believe they have a very good warranty against breakage. they are also easy to setup and install.
Good luck.

slob
08-18-2004, 02:17 AM
Bob,

all the machines I have used had the DRO mounted on the quill. yes the quill isnt as accurate as the knee......but it becomes much more accurate when you have the DRO mounted there. your knee is already accurate so the only thing you lose is the convenience for being able to glance at the screen.

I would say mount it on the quill :D

not a (good) machinist....but I play one here at work :lol:

Rob

Kerry Pinkerton
08-18-2004, 04:13 AM
Bob, I'm certainly NOT a machinist although I seem to make a lot of chips these days... :lol:

My Bridgeport has X & Y DROs and I love it. I know, you can do just as good work without them but for a newbie, I believe they make life MUCH easier. Especially for those of us old poots with bifocals.

Regarding Z axis, you can also get a 'quill DRO" kit that is a mounting bracket that bolts on the front of the quill head and is basically a digital caliper. I have one but haven't gotten around to installing it. However, my neighbor has one and loves it. They are pretty cheap...less that $200 if memory serves.

If you went with Z on the knee, you could also put one of these on the quill....

Bob Baisden
08-18-2004, 04:27 AM
Hi guys,

Thanks for all the good ideas!
Bob