Harrison M250

[Arthur Kingdon]

Hi Arthur :wave: < smiley has lost his bike.... Never seen that particular lathe so can't offer any help....does it accept G-code? The only Lathes I use regularly are my cheapo Chinese manual a Colchester Mascot and a Triumph.....the CNC is a Leadwell with a scary spindle....My code gets checked before being run through that as I'm a noobcake CNC lathe operator :D


Give us some pages from the manual......Most users of home cnc gear are using Mach or if they have 10 years free EMC2 (I'm gonna get slapped for that emc comment lol )

Hi Kip,

Yes it does accept G codes, M codes also.

The Harrison brochure lists: ISO codes, decimal point programming, radius programming, 250 blocks of memory (8K!), programming absolute and incremental, cassette programming or RS 232 interface etc.

The machine dates from 1985 so probably predates Mach?

The brochure also stressed the 'ease of use and simplicity with respect to programming'! Mmmm

I'll have to look into scanning a few pages and how to post them.

Thanks,

Arthur

[Ross77]

Hi Arthur
looks like a nice set up, Just about to learn how to use a manual lathe so no advice im afraid.

I watch with interest as I feel like building one but always imagine the tool hitting the chuck :scaredycat:

Do CNC lathes not have limit swithes then? I planned to cnc my lathe at some point but not sure now

[irving2008]

Arthur,

I take it you have read the info here on Tony Griffiths site? Looks quite a nice beast...

[Arthur Kingdon]

Hi,

Yes thanks, I've seen the info on the Tony Griffiths site but it only covers the manual version of the M250. Mine is the manual/CNC Trainer that was used to supply colleges etc. I've been using it for a while in manual mode and the stepper motor on the cross slide does not interfere with such use. It's a good piece of kit and I'd really like to explore it more fully.

Arthur

[irving2008]

I had a quick google for any examples of use but nothing found, although lots of places to buy the manuals... but you have the programming guide already.

So get 'em scanned and I'm sure between Kip, myself and few others we can help you work it out!

[Arthur Kingdon]

I had a quick google for any examples of use but nothing found, although lots of places to buy the manuals... but you have the programming guide already.

So get 'em scanned and I'm sure between Kip, myself and few others we can help you work it out!

Hi,

The scanning is no problem but what is the best way to let you view the pages?

Thanks,

Arthur

[irving2008]

Hi,

The scanning is no problem but what is the best way to let you view the pages?

Thanks,

Arthur

Ideally scan to PDF, but if not just scan to tif files and post them here.

[Arthur Kingdon]

Ideally scan to PDF, but if not just scan to tif files and post them here.

Right then, scans done as 96dpi bitmaps and saved as tiffs - size around 100kb, not good for printing but should be OK for viewing on screen. I hope they don't take too long to download.

I have scanned a few pages which I think might be relevant plus the contents page to show what is in the manual.

The uploads just failed - 'invalid files' - perhaps tiffs are not acceptable?

[John S]

Arthur, not stuck my nose in before as I can't help out because many of these commercial controllers are special to the manufacturer and / or machine.
Silly things like hold the prgm key in until it boots then release.

Because it's a commercial control you could ask on the CNC machining page on Practical Machinist, there are some knowledgeable people there and few UK posters who may have had M250 experience.

http://www.practicalmachinist.com/vb...hining-21.html

.

[Arthur Kingdon]

Arthur, not stuck my nose in before as I can't help out because many of these commercial controllers are special to the manufacturer and / or machine.
Silly things like hold the prgm key in until it boots then release.

Because it's a commercial control you could ask on the CNC machining page on Practical Machinist, there are some knowledgeable people there and few UK posters who may have had M250 experience.

http://www.practicalmachinist.com/vb...hining-21.html

.

Hi John,

Thanks for the input - the Harrison flyer states 'The CNC control has been specifically designed for this lathe and its training applications' so you are correct in suggesting it may be special. I'll post a question on the Practical Machinist site - I can't be the only person using one of these, surely?