Messages

1

General Mach Discussion / Re: Mach 3 toolchange for dummies???

« on: October 13, 2011, 04:27:20 PM »

I have removed it and  I do have the pulse from the spindle.

Thanks again

Arthur

2

General Mach Discussion / Re: Mach 3 toolchange for dummies???

« on: October 13, 2011, 01:34:07 PM »

Thanks Hood,

Following our conversation on skype the other night the turret is now workiing well and there are no more strange moves after tool change.

One more question for you there is an NPN proximity switch on the x axis lead screw with a slotted disc. Should I be using this? it is not connected yet.

Regards

Arthur

3

General Mach Discussion / Re: Mach 3 toolchange for dummies???

« on: October 10, 2011, 10:53:34 AM »

The tool number DRO  is updating correctly and the offset is ok when called.

The problem is when the tool returns to the original position before the change is called.

Changing from tool 1 to tool 2 is okay as tool 1 has no offset but changing from tool 2 to tool 4 the machine returns to the offset stated in tool table for tool2 not the original start point.

Calling the tools T0101 M06 etc.

Regards

Art

4

General Mach Discussion / Re: Mach 3 toolchange for dummies???

« on: October 10, 2011, 06:18:15 AM »

Hi Hood,

I noticed a problem over the weekend while using the lathe  that the tool change is adding the tool offsets from the previous tool to the move back to the original start point.

If I start at X0 Y0 with tool 1 (which has no offset) and change to tool 2 the turret moves to the safe position stated in the Macro and returns to x0 y0.
When I change to tool 4 the turret moves to the safe position and returns to  x-35.8170 y18.349 which is the offset for tool 2
If I return to tool 1 the turret moves to safe position and returns to x-71.634 y 53.560.

This distance increases with every tool change until the axis hits the limits.

Any ideas what I am doing wrong?

Regards

Arthur

5

General Mach Discussion / Re: Mach 3 toolchange for dummies???

« on: October 05, 2011, 04:35:24 AM »

Hi Hood,

It was a boxford 240 cnc lathe that came with the tool turret fitted. It used to run on a BBC computer. It was in really good conition very little used.
I picked it up a few years ago for £400.00  from a college near Glasgow. I  used the original steppers and drives and fitted a Campbell combo board.

Regards

Arthur

6

General Mach Discussion / Re: Mach 3 toolchange for dummies???

« on: October 04, 2011, 05:24:19 PM »

Thanks Hood

Its all working well now I have just run a job through and all tool changes went without any problems.

The tool table thing was just me trying to find a way of getting the correct angle for the tool but SetOemDRO(803,(Apos-2)) was all that was required.

Thanks again

Arthur

7

General Mach Discussion / Re: Mach 3 toolchange for dummies???

« on: October 04, 2011, 12:53:10 PM »

Hi Hood,

Please find attached Macro and image of screenset I am using.

I think I need to set the DRO at the exact angle after every toolchange, this macro sets the dro to the requested angle to pass the rachet. ie 47 degrees for tool 2 which means that it tool 3 is set to move to 97 degrees it is only actualy moving 45 degrees and does not pass the ratchet.

Can I use the tool table to enter the angle of the turret and read this from the tool direction reading on the screen.

Regards

Arthur

8

General Mach Discussion / Re: Mach 3 toolchange for dummies???

« on: October 04, 2011, 08:49:16 AM »

Hi Hood

You enter degrees in tool position in the tool table.

Arthur

9

General Mach Discussion / Re: Mach 3 toolchange for dummies???

« on: October 04, 2011, 08:44:23 AM »

Hi Hood,

I have a label with tool position showing the degrees of the tool position which has an OEM code 106 Can I use this with SetOemDRO(803,xx) where xx is the number stated as the tool position?(OEM106)

Regards

Arthur

10

General Mach Discussion / Re: Mach 3 toolchange for dummies???

« on: October 04, 2011, 04:12:50 AM »

I was going to try and modify the one I emailed you earlier.

Regards

Art