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Drilling code
« on: April 25, 2008, 05:03:09 PM »
Hello,

I am an experienced machinist and just want to know can you put in minus R values while using canned cycles for drilling.

So if you are drilling holes on the surface i.e. 'Z' zero you put in the following for example G81 Z-10 R2.(This is metric not inch figures).

This feeds down to Z depth of -10mm from Z zero starting at 2mm above surface.

Now if I had a pocket that was 40mm deep and needed several holes in the bottom face can you put a minus R value so it does not have to feed from the top Z zero surface.

Example G81 Z-43 R-38.

This rapids down to 2mm above surface of pocket base and then feeds from here to drill through base wall at 43mm depth.

I have worked with various verticle and horizontal CNC milling machines and they have this feature.

If this can't be done, I will carry on by programming each drilled position without a canned cycle for drilling.

Thanks

Mel

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Re: Drilling code
« Reply #1 on: April 25, 2008, 05:15:01 PM »
Yes, seems like you can,  I have just checked by doing it in the bolt circle  wizard and it seems to work fine in the simulation.
Hood
Re: Drilling code
« Reply #2 on: April 25, 2008, 05:20:40 PM »
Hi there,

Yep, it does work on simulation. I will try this tomorrow morning on the machine.

Being in the UK its nearly time for bed for me.

Thanks

Mel

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Re: Drilling code
« Reply #3 on: April 25, 2008, 05:22:56 PM »
I am in Scotland so time is similar :)

Hood
Re: Drilling code
« Reply #4 on: April 25, 2008, 05:24:22 PM »
Sorry didn't see your location there, I must be tired.

Mel

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Re: Drilling code
« Reply #5 on: April 25, 2008, 05:26:51 PM »
Ha ha, no problem, where about are you in the UK?
Hood
Re: Drilling code
« Reply #6 on: April 25, 2008, 05:29:40 PM »
Bedfordshire, I'm 45miles from London.

Smack in the middle of Milton Keynes, Luton and Aylesbury.

Mel

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Re: Drilling code
« Reply #7 on: April 25, 2008, 05:32:56 PM »
Its great to see more UK users of Mach here.
Hood
Re: Drilling code
« Reply #8 on: April 25, 2008, 05:38:52 PM »
Yep.

Probably the best one out the lot.

I have seen others but none as informative as this one.

Just need more time to post more, I am developing a new CNC milling machine from scratch, hopefully might be able to sell it once done.

Currently designing high power control box. This will be available soon.

Mel

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Re: Drilling code
« Reply #9 on: April 25, 2008, 05:49:32 PM »
Sounds interesting, keep us informed how things are going and maybe post some info and pics in the ShownTell section.
Hood