Limit Switch Bypass

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762x51
Posts: 119
Joined: Wed Aug 02, 2017 8:40 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: B0D5CC56DD75-0605170063 , 985DAD4295CF-0928170127 , 38D2694E4703-1222170401
DC3IOB: No
CNC11: No
CPU10 or CPU7: No
Location: Near Guilford College, Greensboro, NC
Contact:

Limit Switch Bypass

Post by 762x51 »

Is there a way to bypass the limit switches?

I was testing the Isel router's movement and accidentally triggered the Y+ axis limit switch and the only way I could get it off the switch was to jumper the switches wiring in the control panel. With the X+, Y+, and Z- limit switches in series with the E-Stop the Acorn thinks the E-Stop is pushed and I know of no way to bypass that signal except for the way I did.

Would wiring them to IN4, 5, and 6 be a better solution and setting, for example the Y+ limit, as "SecondAxisPlusLimitOK" ?

Orin
cnckeith
Posts: 7164
Joined: Wed Mar 03, 2010 4:23 pm
Acorn CNC Controller: Yes
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CPU10 or CPU7: Yes
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Re: Limit Switch Bypass

Post by cnckeith »

If the inputs are available then yes it's better to wire them into the free inputs ..that way the limit override button on the VCP will allow jogging off the limit.

Wiring limits into the estop circuit is only a technique used to save inputs and when you do that ...you typically wire in a momentary switch that will bypass the limits which will allow you to press that momentary button and Jog off the tripped limit switch.
Need support? READ THIS POST first. http://centroidcncforum.com/viewtopic.php?f=60&t=1043
All Acorn Documentation is located here: viewtopic.php?f=60&t=3397
Answers to common questions: viewforum.php?f=63
and here viewforum.php?f=61
Gear we use but don't sell. https://www.centroidcnc.com/centroid_di ... _gear.html
762x51
Posts: 119
Joined: Wed Aug 02, 2017 8:40 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: B0D5CC56DD75-0605170063 , 985DAD4295CF-0928170127 , 38D2694E4703-1222170401
DC3IOB: No
CNC11: No
CPU10 or CPU7: No
Location: Near Guilford College, Greensboro, NC
Contact:

Re: Limit Switch Bypass

Post by 762x51 »

Hi Keith,

Thanks for confirming that this will work - Wiring and wizard changes will be made this evening.

Orin
762x51
Posts: 119
Joined: Wed Aug 02, 2017 8:40 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: B0D5CC56DD75-0605170063 , 985DAD4295CF-0928170127 , 38D2694E4703-1222170401
DC3IOB: No
CNC11: No
CPU10 or CPU7: No
Location: Near Guilford College, Greensboro, NC
Contact:

Re: Limit Switch Bypass

Post by 762x51 »

Keith,

After giving this more thought, a momentary push button makes more sense so I'm going to install one so I don't loose 3 inputs.
Thanks for that suggestion.

Orin
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