1107
« on: February 13, 2008, 01:59:12 AM »
Hi, Glen
Even if you have a good sharp clean pulse on your scope, Mach needs enough time to see the pulse change state.
On my emco compact 5 lathe the disk is 5 inch diameter with a 3/4 to 7/8 inch slot, good pulse up-to around 3000 rpm.
Mach has allot of things going on, Scanning for this index pulse is one of many.
Last week we had a similar problem with a index pules even with a 1 inch slot it wouldn't work, Turned out that the index pulse was going through an OPTO
coupler that was to slow to see and change it's state fast enough. Wound up using an input pin on the board that went direct to the printer port.
Set your "Index De-bounce" to 500 or so, The 'De-bounce Interval" is for Limit switches and such, It should be set to 500 to 2000, Switches bounce
sometimes, Both help to eliminate/see-through noisy wiring.
What's the disk diameter and Gap ?
Hope this Helps, Chip