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Offline greg

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limit switch trouble
« on: March 03, 2008, 06:35:16 PM »
 ???  i can not get my limits to work. unplugged from the bob they break continunity if any switch is tripped. hooked to the bob it[the bob] goes from 0 to 5volt when a switch is trippsd but the reset does not go off. i have them set to port 1  all on pin 12  all active low [have tried active high same thing]. what can be wrong?
thanks greg
Re: limit switch trouble
« Reply #1 on: March 03, 2008, 07:13:54 PM »
Hey Greg,
 I assume you mean the Reset doesn't trip.
Are your inputs enabled ?  Not clear in your post.
RC

Also, are they wired in series ?
« Last Edit: March 03, 2008, 07:16:01 PM by Overloaded »

Offline greg

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Re: limit switch trouble
« Reply #2 on: March 03, 2008, 07:27:02 PM »
 yes i mean the reset. yes i have them enabled. tried both active high & low. checked & unchecked emulate [not sure what this is or what it does?]. i do not know what else to try.
  thanks greg  :)
Re: limit switch trouble
« Reply #3 on: March 03, 2008, 07:37:31 PM »
Oooops,
Attempted to edit.....and lost it.
I don't think the override would keep them from working.

« Last Edit: March 03, 2008, 07:41:17 PM by Overloaded »

Offline greg

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Re: limit switch trouble
« Reply #4 on: March 04, 2008, 08:52:16 AM »
   ??? ???anyone else have any ideas?  ??? ???

vmax549

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Re: limit switch trouble
« Reply #5 on: March 04, 2008, 09:11:12 AM »
Greg, from what yu describe you should be using active high setting if th evoltage goes high when a switch is tripped. It seems  as though the signal is either not getting to mach or is set for the wrong pins.

You can check to see if the signal is coming in on the port from the diagnostic screen. When you trip the switch one of the leds on the two rows of diag led should light up. If you see activity there then it is a pin selection problem.

(;-) tp

If

Offline greg

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Re: limit switch trouble
« Reply #6 on: March 04, 2008, 10:26:58 AM »
on the diagnostics page none of the lights flash when i toggle a switvh. when i put the switches on active high the big error box comes up & when i tell it to fix the problem it puts it back to active low.
thanks greg ???

Offline kak

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Re: limit switch trouble
« Reply #7 on: March 04, 2008, 10:28:12 AM »
How about telling the software in the " input signal" , which Pin on your driver board you use for the limit switches in series

X++, Y++ and Z-- should use the same PIN number.   - if your Z axis limit is negativ.   I have to check that - i`ll be back.

Adam
« Last Edit: March 04, 2008, 10:33:07 AM by kak »

Offline greg

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Re: limit switch trouble
« Reply #8 on: March 04, 2008, 10:52:30 AM »
i have them all on pin 12.
 thanks greg ???

vmax549

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Re: limit switch trouble
« Reply #9 on: March 04, 2008, 11:21:54 AM »
Greg if you are not seeing the activity on the leds then the signal is NOT getting through your BOB. I assume that your switches are set up in series  and you end up with one wire leading to an input on the BOB and one to board common ?

ALSO keep in mind that pin 12 on the BOB may not be pin 12 to mach(;-) YOu will have to consult the BOB manual for the correct pin out.

I would use normally closed set up so if a wire were to break it would trip also. It will require and active high setting in mach setup.

So if you are getting the signal to the BOB but not to mach then investigate that problem.

(;-) TP
« Last Edit: March 04, 2008, 11:32:03 AM by vmax549 »