Search found 939 matches

by Dave_C
Sat Mar 10, 2018 9:26 am
Forum: Home Shop CNC
Topic: G0678 CNC Conversion Build Log
Replies: 52
Views: 6677

Re: G0678 CNC Conversion Build Log

Yeah, that is closer to what I intended to do in the beginning. If i can find the right parts, I will still make the change next winter but for now it is going to be what it is.

Dave C.
by Dave_C
Sat Mar 10, 2018 9:15 am
Forum: Home Shop CNC
Topic: Ballscrew tolerances and real world performance
Replies: 12
Views: 1640

Re: Ballscrew tolerances and real world performance

just remember where I was last time
I thought I was the only one with that problem! :roll:

Dave C.
by Dave_C
Sat Mar 10, 2018 9:12 am
Forum: General Discussion
Topic: Slitting saw
Replies: 32
Views: 1950

Re: Slitting saw

Don't climb cut. That's a recipe for disaster Most of our manual mills have enough backlash to let the saw grab and given the number of teeth in the cut it can grab quite vigorously! Even to the point of pulling the piece out of the clamping device. I'm a bit confused over the "putting it in a lath...
by Dave_C
Fri Mar 09, 2018 8:37 pm
Forum: General Discussion
Topic: Slitting saw
Replies: 32
Views: 1950

Re: Slitting saw

Well, from the info given I'd say maybe because you don't say how long this slot would be. It may not be the best use of the saw but I've used them for odd jobs like this and if you have a good blade and arbor you can make some good cuts. Holding it solid is key as well. It can't be bending while yo...
by Dave_C
Thu Mar 01, 2018 11:23 am
Forum: Home Shop CNC
Topic: Building a CNC router
Replies: 11
Views: 1344

Re: Building a CNC router

Ron, Glad that helped. Something I did not mention about G-Code is that not all machines use the same format of the G-code. So to solve that problem the CAM programs have what is called "post Processors" and each machine may have its own post processor so that it can understand and run the G-code pr...
by Dave_C
Wed Feb 28, 2018 3:34 pm
Forum: Home Shop CNC
Topic: Building a CNC router
Replies: 11
Views: 1344

Re: Building a CNC router

Mr. Ron, Going from design to a finished product I suppose is the idea behind any product whether it be from hand sketches and something made on a manual lathe/mill or in your case a software drawing to a finished product. I'll walk you through the steps as best I can for doing it with CNC. CNC part...
by Dave_C
Mon Feb 26, 2018 9:11 am
Forum: Home Shop CNC
Topic: G0678 CNC Conversion Build Log
Replies: 52
Views: 6677

Re: G0678 CNC Conversion Build Log

I thought you were not going to use the quill due to the backlash, and use the knee instead. Glenn, if the backlash issue becomes a problem I'll go back to my original plan and move the quill with a ball screw. I could not get the small size I needed from the same vendor I was using so I opted for ...
by Dave_C
Sun Feb 25, 2018 8:24 pm
Forum: Home Shop CNC
Topic: G0678 CNC Conversion Build Log
Replies: 52
Views: 6677

Re: G0678 CNC Conversion Build Log

Oh no, you've misunderstood how this is going to work. The Z axis is the quill/spindle but it is limited to 4" of travel. However, 4" will do about anything I need to do except to make tool changes for long tools such at when I need to drill or use a reamer. So I only move the knee to change the too...
by Dave_C
Sun Feb 25, 2018 7:52 pm
Forum: Home Shop CNC
Topic: G0678 CNC Conversion Build Log
Replies: 52
Views: 6677

Re: G0678 CNC Conversion Build Log

Not being able to lock the knee would have a significant affect on regidity and finish. This is why bed mils are superior to knee mills even with the knee locked. I agree that bed mills are far superior, but why say "not being able to lock the knee" because I can lock the knee at any height I wish?...
by Dave_C
Sat Feb 24, 2018 5:01 pm
Forum: General Discussion
Topic: It's been a long, long, long time!!
Replies: 16
Views: 1155

Re: It's been a long, long, long time!!

Jose: Good to see you back! Like you, I took some years away as well and did some traveling in the RV. I've since sold the RV and started on a Centroid Acorn Mill conversion. I just about have it done, just waiting on some back ordered parts to show up so I can finish the Z axis and the spindle enco...
by Dave_C
Thu Feb 22, 2018 9:35 am
Forum: General Discussion
Topic: Collet Clamping Nut driving me nuts!
Replies: 16
Views: 1429

Re: Collet Clamping Nut driving me nuts!

In the first pic below, you can see the familiar non-concentric ring in my usual clamping nut.
I suspect this one is designed to be self releasing as it will draw the collet out of the holder when you unscrew it while the one without the ring will not!

Dave C.
by Dave_C
Sun Feb 18, 2018 1:51 pm
Forum: Home Shop CNC
Topic: G0678 CNC Conversion Build Log
Replies: 52
Views: 6677

Re: G0678 CNC Conversion Build Log

Progress Report: I have the encoder mount almost complete, I just need to put the slots in for the mounting bolts and the three set screws to allow for alignment of the belt. I'm still waiting on the pulleys and belts for the X axis and the encoder. The encoder mount uses two 10 mm bearings, a shaft...