Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: edcross on December 26, 2015, 11:19:04 AM
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My limit switch's work as they are supposed to , my problem is when my spindle runs into a knot or heavy cutting ( wood router machine ) the vibration trips a limit switch . Usually the Z or Y switch , my question is , can I have the homing switched back off more , so they are not on the brink of tripping , and thus not trip when there is a little more vibration.
Thanks
Ed
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I think you really need to replace the switches with a type that is more robust (Honeywell perhaps ?).
Although it may mean a fair bit of work, replacing the mechanical switches with solid state proximity switches may something worth considering.
Tweakie.
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Switches that are used to establish a 0 position must open with a very small amount of travel, otherwise your 0 will be all over the place. Limit switches are often snap action so they don't vibrate open, but they won't be accurate. So a switch that is accurate and vibration resistant is a bit tough to do. Do you actually home your machine or just pick up coordinates for a part and go?
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Switches that are used to establish a 0 position must open with a very small amount of travel
I always believed that the repeatability of the switching point was the important bit and not the travel but I'm always keen to learn, can only short travel switches provide repeatability?
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You are of course right, but it is really difficult to build a switch with a long travel and accurate activation point. So they tend towards being one or the other, not both.
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Hi Ed, I had a similar issue but it was not vibration directly causing a switch to trigger - it was vibration setting up noise in the line that was picked up by Mach. I adjusted the sensitivity in Mach. I set debounce interval to 1000 and Index debounce to 4. Solved it. Maybe you have the same?