Search found 21 matches

by Petel
Thu Jan 11, 2024 5:04 pm
Forum: Centroid Acorn CNC Controller
Topic: Using round profile inserts on a lathe
Replies: 11
Views: 3828

Re: Using round profile inserts on a lathe

OK, thanks for the help.

Can Centroid please add a fix to the 'to do' list?
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by Petel
Wed Jan 10, 2024 6:12 pm
Forum: Centroid Acorn CNC Controller
Topic: Using round profile inserts on a lathe
Replies: 11
Views: 3828

Re: Using round profile inserts on a lathe

Thanks,

Am I correct to assume that this is just a graphing error in intercon and that the g-code will be correct? I'm sure I heard the cut change when I was running the job suggesting that the machine was following the graphics, or maybe it was my imagination?

Do you know if this issue is fixed ...
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by Petel
Wed Jan 03, 2024 5:52 pm
Forum: Centroid Acorn CNC Controller
Topic: Using round profile inserts on a lathe
Replies: 11
Views: 3828

Re: Using round profile inserts on a lathe

Escape angle is 45. Report and intercon file attached.

It's the finish profile graphed shape that I'm unsure about - tried many different combinations of parameters but I can never get 2 parrallel grey lines on the graphing in the radius suggesting the finish shape is not correct (because the tool ...
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by Petel
Fri Dec 29, 2023 7:01 pm
Forum: Centroid Acorn CNC Controller
Topic: Using round profile inserts on a lathe
Replies: 11
Views: 3828

Re: Using round profile inserts on a lathe

Thanks for the ideas; managed to get a result today with nose vector = 3 and cutter comp = right as suggested. The tool was set to left and front edges.

I'm still confused with the intercon graphing - on the attached image you can see the finished shape / finish cut lines overlap on the right of ...
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by Petel
Thu Dec 28, 2023 5:17 pm
Forum: Centroid Acorn CNC Controller
Topic: Using round profile inserts on a lathe
Replies: 11
Views: 3828

Using round profile inserts on a lathe

I'm confused as to how to setup and use round circular inserts (RCMT type) on my lathe...first issue really.

I'm trying to make a simple 5mm radius semi-circular groove in a bar. I have a circular RCMT profile tool, radius 3mm. Program is a profile in intercon based on part dimensions.

Tool is ...
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by Petel
Sun Apr 30, 2023 5:55 pm
Forum: Centroid Acorn CNC Controller
Topic: Lathe thread chasing
Replies: 5
Views: 1066

Lathe thread chasing

Is there a method on Centroid Lathe to pick up on a thread that needs re-cutting / chasing?

Thread cutting within a program on a new part is great, I've had good success with this, but how do I put a threaded component back into the chuck and recut the same thread to repair it or lengthen it?

The ...
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by Petel
Wed Feb 22, 2023 6:56 pm
Forum: Centroid Acorn CNC Controller
Topic: Harrison M250 CNC Acorn retrofit
Replies: 8
Views: 1797

Re: Harrison M250 CNC Acorn retrofit

No need to find 45mm shafts: Cut out the existsing aluminium mount plates (t=15mm) and insert new steel mounting plates (t=6mm) to the front of the mount. The steel plates allow you to add the new servo PCD.

This moves the servo forward in the mount by ~ 9mm and leaves the end of the shaft in the ...
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by Petel
Tue Feb 14, 2023 7:05 pm
Forum: Centroid Acorn CNC Controller
Topic: Harrison M250 CNC Acorn retrofit
Replies: 8
Views: 1797

Re: Harrison M250 CNC Acorn retrofit

I can't remember what the old servo setup was - SEM units with encoders and tachos I think? I did not take much interest as I planned to use more modern units from the start.

I used the generic Chinese AASD type AC servos, a 90ST-M02430 and a 90ST-M04025. The pulleys dropped straight on. I was ...
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by Petel
Mon Feb 13, 2023 6:41 pm
Forum: Centroid Acorn CNC Controller
Topic: Harrison M250 CNC Acorn retrofit
Replies: 8
Views: 1797

Re: Harrison M250 CNC Acorn retrofit

I'm just finishing a similar conversion on a M300. I re-used the Anilam 1000 line encoder (different part no. to yours) and put it through a single ended to differential converter - seems to work OK https://www.cnc4pc.com/c72-differential-line-driver.html

If it helps the Anilam encoder wire colours ...
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by Petel
Wed Aug 29, 2018 6:24 pm
Forum: Centroid Acorn CNC Controller
Topic: New project and limit switch question
Replies: 17
Views: 8312

Re: New project and limit switch question

Keith

I was hoping to use the same limit switch at both ends of travel (X+ & X-) and also to home at the X+ limit.

I want to use the switches as a precaution in case I run into a position error at any point and try to over travel...I'm happy to work off the soft limits most of the time, but really ...
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