[tmarks11]

I use HSMWorks, and the default Tormach post processor spits out an m998 (go to tool change height) for each tool change.

Which has worked out okay so far. I have no ATC, and the m998 seemed to put the spindle near the top whenever a tool change was required.

I was cutting a bracket out of 1/4" plate, all axis were referenced, first tool (a 1/2" jacobs chuck with a drill) was already in the spindle. m998 is called, and the spindle plunges down. I smacked the e-stop as the drill hit the workpiece; fortunately nothing damaged.

I know that I have used this chuck with a similar sized drill bit, with a workpiece in the vise, and have never had this problem before.

m998 is now sending the spindle nose to a height of 10.5" above the table, which looks to me (from reading the ATC manual) to be several inches below what the tool change position should be. Nothing in the new 1100 manual or the new ATC manual discusses how to change what is defined as the tool change height.

Anyone confirm what height about the table m998 sends their machine to? I swear it used to be almost at the upper limit switch.

I have an 1100 and am running 1.8.2.

[mountaindew]

Search pp manual for g30 for complete explanation.
I cut this part for reference:
The Go To G30 button causes the machine to move to the a pre-defined G30 position, and is
equivalent to typing G30 in the MDI Line. This G30 position can be set using the Set G30 button on
the Offsets screen. Operators familiar with M998 will notice that the behavior of G30 is identical to
M998. By default, the move to the G30 position is in Z only. This can be changed on the Settings tab

The way I understand it m998 or g30 send z to the position defined for m30

Hope this helps

[tmarks11]

got it, thanks. I must have reset G30 last time I was using the mill.

Strange that it would retain the value, but with no indicator light on the G30 button saying it was something other than default. I don't like hidden parameters that you can't tell have changed.

I guess that also applied to mach3, as the m998 could be changed from the SETTINGS tab.

I think I prefer that arrangement, as setting G30 is something I don't really need to do often, and placing it on the OFFSETS page (where I go a lot) makes it more likely to be hit by accident, vs the SETTINGS tab, which I never look at.