machine stops when homing

[JAZZCNC]

Don't think it will be noise and I wouldn't mess with de-bounce has it will just add a delay to the homing process and make it less accurate.

More than likely you have Dodgy switch or lose wire connection, possibly bit of crap in the switch if Micro type.?

Did you try restarting PC and trying again.? Could have possibly been a Mach issue i've seen it do daft stuff like this before and be fine after restart.!

[routercnc]

Hi Dean,

I only had an hour today so didn't get to try out many options including PC re-boot. The switch did have bits of swarf around it so could be that. It's been on that machine for a while so maybe it's starting to play up.

I'll see if it is OK next time I fire up the PC. I'll also try a new switch and give the terminal connectors a bit of a squeeze before sliding them onto the switch again to get a tight electrical joint.

Thanks

[routercnc]

OK managed to have a quick check in the workshop.

Fired up PC and still same problem.

Unplugged the microswitch and used a multimeter across the terminals whilst pressing the lever. The multimeter beeped but as the switch clicked across the beep was a bit warbly just before it stopped as if the switch contacts were not that clean.

I fitted another microswitch and squashed the terminal connectors a bit on the cables to make sure the joints were tight. Tried homing again but the same problem.

Tried debounce 5000 (x40us) and it homed properly although there was the expected delay. Then tried 1000, 500, 100, 50, and finally 2 (x40us) and they all homed properly with reducing delay. I kept the 2 (x40us) value and homed 10 times in a row and each time was perfect. I'll leave it like that for now.

I think the machine knows it is building it's successor and is chucking a few things at me along the way!