Limit Switch Bypass

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762x51
Posts: 118
Joined: Wed Aug 02, 2017 8:40 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC11: No
CPU10 or CPU7: No
System Serial Number: B0D5CC56DD75-0605170063 , 985DAD4295CF-0928170127 , 38D2694E4703-1222170401
Location: Near Guilford College, Greensboro, NC
Contact:

Limit Switch Bypass

Post by 762x51 » Sun Dec 03, 2017 11:35 pm

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: 518
Joined: Wed Mar 03, 2010 4:23 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: Yes
MPU11 & GPIO4D -w/ 3rd Party Drives: Yes
DC3IOB: Yes
CNC11: Yes
CPU10 or CPU7: Yes
System Serial Number: none
Contact:

Re: Limit Switch Bypass

Post by cnckeith » Mon Dec 04, 2017 12:14 am

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.

762x51
Posts: 118
Joined: Wed Aug 02, 2017 8:40 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC11: No
CPU10 or CPU7: No
System Serial Number: B0D5CC56DD75-0605170063 , 985DAD4295CF-0928170127 , 38D2694E4703-1222170401
Location: Near Guilford College, Greensboro, NC
Contact:

Re: Limit Switch Bypass

Post by 762x51 » Mon Dec 04, 2017 2:09 pm

Hi Keith,

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

Orin

762x51
Posts: 118
Joined: Wed Aug 02, 2017 8:40 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC11: No
CPU10 or CPU7: No
System Serial Number: B0D5CC56DD75-0605170063 , 985DAD4295CF-0928170127 , 38D2694E4703-1222170401
Location: Near Guilford College, Greensboro, NC
Contact:

Re: Limit Switch Bypass

Post by 762x51 » Tue Dec 05, 2017 2:38 pm

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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