Emco PC120 Turn

[Chaz]

That should work well. Does it take much messing about with Mach3 to get this to work?

[cropwell]

I use P16 for coolant (just an air blower really) and P17 to turn the spindle on (Kress, not a three phase one with speed control)

You may like to play with active high / low and whether you connect to NO or NC on the relay as there can be some activity on the pins before Mach3 takes control.

Cheers,

Rob

[Chaz]

I use P16 for coolant (just an air blower really) and P17 to turn the spindle on (Kress, not a three phase one with speed control)

You may like to play with active high / low and whether you connect to NO or NC on the relay as there can be some activity on the pins before Mach3 takes control.

Cheers,

Rob

Thanks. Appreciated.

[Chaz]

So I ordered this one - https://www.shop-apt.co.uk/part-off-...2mm-shank.html. Its like 2mm too long but I can grind away some of the lip that's in the way. Kudos to APT for the quick delivery as usual.

[jamesgates1000]

Hi, does your lathe have a Baruffaldi TOE80 turret like on a denford cyclone?

http://www.1stmachinery.com/Resource.../1008_6790.JPG

Is so I have a few spare blocks and boring bar sleeves that i made up and also some spare ER25 and ER16 Holders that I bought and modified to suit the 25mm tool holder if you are interested

[Chaz]

Hi, does your lathe have a Baruffaldi TOE80 turret like on a denford cyclone?

http://www.1stmachinery.com/Resource.../1008_6790.JPG

Is so I have a few spare blocks and boring bar sleeves that i made up and also some spare ER25 and ER16 Holders that I bought and modified to suit the 25mm tool holder if you are interested

Nope, similar but not as 'angular' as that. Ill take some pics.

[Chaz]

Please talk to me about Mach 3 tool ofsets.

Mine work however I am confused about one aspect.

This video https://www.youtube.com/watch?v=IAY6M4Q7fIE shows that a Master Tool is set at zero (against an arbitary plane, defined by a bar in the chuck) and all others tools are set against this. I understand this principle, its the way I use my mill offsets.

However, what I am not sure about is how to ensure that the machine 'knows' where X is say 0 or 10mm from the centre line.

The way I have done mine is to home my machine and set all tools from this point. My DRO will therefore say '20mm' and give me a 20mm stock if I cut along that plane (both diameter mode).

The problem is that the limit switches do not repeat 100% and whilst its reasonably accurate, I am not 100% getting the same diameters once the machine is rehomed.

I could use some form of a dialguage and reference of this (for X). Thoughts?

The other option is to home the machine once, then never again. Instead of homing it I should use G Code to 'go to home' but not use the limit switch. Assuming the machine is powered down and restarted with the turret in this location, it should repeat however as I use steppers (not servo), this is not perfect. Any replacement of a tool / tool tip or need to rehome means that my 'diameters' are no longer 100%.

I find that then resetting the diameter size (John Saunders does similar) needs you to cut a part manually, then measure it and then do some sums to get the offset correct. I find this tedious and long winded. Is there a better way?

Thanks