Search found 41 matches

by Rob Carnell
Thu Jan 25, 2024 11:40 pm
Forum: Centroid Acorn CNC Controller
Topic: Lathe - internal threading tool retraction (Solved)
Replies: 2
Views: 509

Re: Lathe - internal threading tool retraction

Thanks, I looked everywhere for that!

Should have searched clearance rather than retraction amount.

Rob.
This post has been liked 0 time(s).
by Rob Carnell
Thu Jan 25, 2024 10:34 pm
Forum: Centroid Acorn CNC Controller
Topic: Lathe - internal threading tool retraction (Solved)
Replies: 2
Views: 509

Lathe - internal threading tool retraction (Solved)

I am trying to cut a thread in a small hole in a timber shaft.

The thread mill only has a small amount of clearance in the bored hole.

When I produce an Intercon program, the cutter retracts too far and ruins the thread.

If there a way to limit the x axis retraction amount?

I have searched the ...
This post has been liked 0 time(s).
by Rob Carnell
Thu Jan 25, 2024 10:02 pm
Forum: Machining Strategies. Work Holding, Tool Path, Cutters, Feeds/Speeds etc.
Topic: Lathe - internal threading tool retraction
Replies: 1
Views: 2291

Lathe - internal threading tool retraction

I am trying to cut a thread in a small hole in a timber shaft.

The thread mill only has a small amount of clearance in the bored hole.

When I produce an Intercon program, the cutter retracts too far and ruins the thread.

If there a way to limit the x axis retraction amount?

I have searched the ...
This post has been liked 0 time(s).
by Rob Carnell
Fri Oct 20, 2023 10:15 pm
Forum: Centroid Acorn CNC Controller
Topic: Lathe spindle motor
Replies: 1
Views: 5839

Lathe spindle motor

I have a metal lathe that I converted to Acorn and I use it to build pool cues. I did not change out the motor and I switch on manually, it’s only 1hp.

Yesterday the motor made a strange straining sound and spewed smoke.

I switched it off immediately and let it cool down, then it seemed to work ok ...
This post has been liked 0 time(s).
by Rob Carnell
Wed Dec 30, 2020 11:39 pm
Forum: Centroid Acorn CNC Controller
Topic: How to Zero Encoder Count
Replies: 6
Views: 3504

Re: How to Zero Encoder Count

Thanks Caleb, that’s what I needed.

Rob
This post has been liked 0 time(s).
by Rob Carnell
Wed Dec 30, 2020 3:41 am
Forum: Centroid Acorn CNC Controller
Topic: How to Zero Encoder Count
Replies: 6
Views: 3504

How to Zero Encoder Count

My Acorn powered lathe works perfectly.

However, I have a need to index some holes around a circumference.

By taking the lathe out of gear it is easy to turn the spindle to the correct position.

I can see the encoder count via the PID screen, but this seems to always start from a random number ...
This post has been liked 0 time(s).
by Rob Carnell
Fri May 08, 2020 4:24 am
Forum: Centroid Acorn CNC Controller
Topic: cnc barrel rifling machine
Replies: 5
Views: 4829

Re: cnc barrel rifling machine

Two ways to do it, with a single encoder or multiple.

Here is a video of how they do it at Bartlein with cnc equipment: https://www.youtube.com/watch?v=sBkrg7JMGdw

So, I guess you could do it with Acorn and a single encoder but you would need specialized software.

Here is a video of the ...
This post has been liked 0 time(s).
by Rob Carnell
Thu May 07, 2020 6:02 pm
Forum: Centroid Acorn CNC Controller
Topic: cnc barrel rifling machine
Replies: 5
Views: 4829

Re: cnc barrel rifling machine

Would not be much help for a button rifling machine, as the hydraulic ram does all the work.

But for a cut rifling setup you could. This is just basically cutting a multi-groove thread inside a tube. The tricky part is indexing the barrel between cuts as these are done with multiple cuts of around ...
This post has been liked 0 time(s).
by Rob Carnell
Tue May 05, 2020 5:06 am
Forum: Centroid Acorn CNC Controller
Topic: Hi from a new member in the UK!
Replies: 21
Views: 10684

Re: Hi from a new member in the UK!

Simon, I think you have a typo there, both say Y axis.

I just built a slightly larger lathe and used 8.5Nm on X axis and 4Nm on Y axis. Both are driven by timing belts and have more than enough power. If you maintain the setup in your pics, it will work fine sized like this.

I have some pics here ...
This post has been liked 0 time(s).
by Rob Carnell
Sat Apr 25, 2020 9:05 am
Forum: Centroid Acorn CNC Controller
Topic: New Acorn Motor Drive Schematics added to the collection..
Replies: 14
Views: 7203

Re: New Acorn Motor Drive Schematics added to the collection..

For the SOL CL57Y this shows header instead of DB25.

I see this is using 24V signal.

I had it that way, and was advised to move to DB25.

Which is best?

Rob.
This post has been liked 0 time(s).