Thats the odd part - there is nothing i can find that touches that DRO so it must be an internal thing linked to pulley numbers or something.

Is there an OEMbutton code for the spindle speed override button - maybe easier to just tack that on at the end??

DoOemButton(183)

I seem to recall however that years ago I had issues using that button in a macro on the Beaver mill and ended up writing to the DRO itself, so if there are problems you could try.

SetOemDRO(74,100)

If however you have a pot and have the IP-A set to control the override itself rather than allowing Mach to, then likely it will force it to 100% anyway.
Hood

yes i too tried button 183 and it was not happy.

I will have a pot on the CSMIO so maybe that will fix it as you say, writing to the DRO could be useful too if not.

Thanks

Sorted

With the help of a much admired friend I now have it working properly.

You have to have two pulleys only,

1= 1 to 3000 rpm reversed
2 = 1 to 3000rpm normal

Using my modified macro attached to instruct which mechanical setting to use, there is now no funky spindle speed override display

Ignore the last post, it worked on the simulation but not in reality as the PWM was totally freaked out!

I have gone back to my code with the screwy SSO DRO stuff, i also fitted the SSO pot so the CSMIO had control - it certainly fixes the weird SSO behaviour BUT the range of the override pot is very limited and dependant on the pulley setting - very complex relationship between pulleys, wpm and SSO pot i think.

Still it all seems to play together now, pretty smoothly.