[ Log In ]
[ Register ]

Question #: 131

Question: The limit switches keep triggering or erroring.

Current Solution

Are you using shielded wire? If so, take the shield to ground. If there are any other wires in the cable that is not being used, ground those as well. The customer can also try moving the cables as far away as possible from the motor wires and motors.

Additional Information:

Respond:

Other Possible Solutions to this Question

  • The limit switches keep triggering or erroring.

    Your limit switch circuit is receiving too much interference from nearby equipment (stepping motors for example). Make sure to use shielded cable and the shielding, and any other wires or conductive material must be grounded. The limit switch circuit cables and wires must be as far as possible from motor wires.

    If all else fails, just use soft limits until a solution to the limit switch circuit can be determined.

    Click the link to respond:
    The limit switches keep triggering or erroring.

  • MY LIMIT SWITCHES ARE TRIGGERING AT RANDOM.

    Are you using shielded wire? If so, take the shield to ground. If there are any other wires in the cable that is not being used, ground those as well. The customer can also try moving the cables as far away as possible from the motor wires and motors.

    Additional Information:

    Click the link to respond:
    MY LIMIT SWITCHES ARE TRIGGERING AT RANDOM.

  • PROBLEM WITH LIMIT SWITCHES TRIGGERING

    Are you using shielded wire? If so, take the shield to ground. If there are any other wires in the cable that is not being used, ground those as well. The customer can also try moving the cables as far away as possible from the motor wires and motors.

    Additional Information:

    Click the link to respond:
    PROBLEM WITH LIMIT SWITCHES TRIGGERING

  • My limit switches keep tripping a reset. Wiring all seems right. Could there be another cause I can check?

    http://buildyourcnc.com/PrimeronHomingandLimitSwitches.aspx
    There is a pin setting in Mach3 that says how to react to the inputs from the switches. Your setting is probably wrong as the trigger happens immediately.

    You may want to think about shielded wire and/or a resistor on each limit switch line. If there are stray wires, connect them to ground. Additionally, the shield from the shielded cable insulation should alse connected to ground at both ends.
    Try upping the Debounce interval in Mach3. You have to adjust the debounce interval. You go to config,general config, and it is in the top right corner. I set mine to 100 and it seems to work well.

    Additional Information:
    how to solution cnc revo 540 limit tripped error?


    Additional Information:


    Additional Information:

    Click the link to respond:
    My limit switches keep tripping a reset. Wiring all seems right. Could there be another cause I can check?

  • What is the wiring configuration for limit switches on the laser controller?

    If you are using the AWC708 or equivalent laser controller, the limit switches will connect between the EL input terminal and the GND terminal in normally open (NO) connection. Most limit switches can be connected as NO, or normally closed (NC).

    For instance, a limit switch for the X- limit will be connected from the ELX- terminal to the NO connection of the limit switch, then a connection from the GND terminal on the laser controller to the COM connection to the same limit switch.

    Click the link to respond:
    What is the wiring configuration for limit switches on the laser controller?

  • Can you tell me what gauge wire is needed for limits switches and the spindle?

    The hookup wires you will need is 22 to 24 AWG stranded and shielded for the wiring of the limit switches and E_Stop. Our kit customers select various places for these switches, so we don't supply the wiring. If you don't use shielded cable, you will need to change the debounce setting in Mach3 (if that is the control program you are using).

    We typically use 14 AWG stranded wire for the VFD to Spindle (U, V, W) connections.

    Click the link to respond:
    Can you tell me what gauge wire is needed for limits switches and the spindle?

  • Do you have a more detailed diagram of the rotary and 15A limit switches on the vlxl?

    Are you trying to determine how to wire the switches or where to place them on the Vertical Laser XL? Let me know and I will provide some pictures or video on how to do this.

    Additional Information:
    Kind of both. Have somewhat of an idea as to how to wire them but you included rotary and other limit switches. Not sure which ones to put where. Never worked with these before.

    Click the link to respond:
    Do you have a more detailed diagram of the rotary and 15A limit switches on the vlxl?

  • Do you sell 22 to 24 AWG stranded and shielded for wiring of the limit switches and E_Stop?

    The wire that we sell for the limit switch wiring is here: https://www.buildyourcnc.com/item/3d-printer-component-cnc-electronicsandmotors-cable-wire-3-conductor-22-awg-wrcon-cablewire3conductor22awg

    This is shielded cable to make sure there isn't any external interference with sensitive components and long wires associated with limit switches. This is necessary due to the interference caused by the motors on a CNC router and the milling process.

    Additional Information:
    So unshielded is cool. That's what I was curious about. Cheers.

    Additional Information:
    Absolutely. It's really the only type of cable I would recommend for connecting limit switches.

    Click the link to respond:
    Do you sell 22 to 24 AWG stranded and shielded for wiring of the limit switches and E_Stop?

  • How are limit switches connected to the AWC708 controller?

    If you are using the AWC708 or equivalent laser controller, the limit switches will connect between the EL input terminal and the GND terminal in normally open (NO) connection. Most limit switches can be connected as NO, or normally closed (NC).

    For instance, a limit switch for the X- limit will be connected from the ELX- terminal to the NO connection of the limit switch, then a connection from the GND terminal on the laser controller to the COM connection to the same limit switch.

    Click the link to respond:
    How are limit switches connected to the AWC708 controller?

  • wiring limit switches in series NC to the V5 Break Out Board

    When wiring limit switches to the breakout board, generally NC (Normally Closed) are connected in series (acts like a wire that when broken, breaks the circuit). NO (Normally Open) is generally wired in parallel where if one is pressed, the wire creates a circuit connecting the pin to gnd.

    Additional Information:


    Additional Information:


    Additional Information:

    Click the link to respond:
    wiring limit switches in series NC to the V5 Break Out Board

  • How should I connect the limit switches to my laser controller?

    If you are using the AWC708 or equivalent laser controller, the limit switches will connect between the EL input terminal and the GND terminal in normally open (NO) connection. Most limit switches can be connected as NO, or normally closed (NC).

    For instance, a limit switch for the X- limit will be connected from the ELX- terminal to the NO connection of the limit switch, then a connection from the GND terminal on the laser controller to the COM connection to the same limit switch.

    Click the link to respond:
    How should I connect the limit switches to my laser controller?

  • Are there any videos detailing wiring of limit switches and stop button?

    This video may serve helpful on the homing and limit switches:
    https://www.buildyourcnc.com/PrimeronHomingandLimitSwitches.aspx

    I don't go into great detail on the wiring, however. If after you watch that video and you still need a video, please let me know and I will make a video on the wiring of limit switches and the E-stop button.

    Click the link to respond:
    Are there any videos detailing wiring of limit switches and stop button?

  • What power supply do you recommend for the spindle and limit switches if I buy the USB Mach3 breakout board?

    Any of the following power supplies will be fine for powering the Mach3 USB controller:
    https://www.buildyourcnc.com/item/24v

    however, the limit switches do not need high current, so the following power supply is sufficient for the task of connecting limit switches:
    https://www.buildyourcnc.com/item/electronicsAndMotors-power-supply-24v-1a-dc

    Click the link to respond:
    What power supply do you recommend for the spindle and limit switches if I buy the USB Mach3 breakout board?

  • Were are the mounting locattions of the 6 Limit switches on the Blackfoot 4.3

    Here are the recommended locations for limit switches for our CNC machine kits.

    The x-axis limit switches should be located on a single gantry. This makes the wiring of the limit switches close in proximity and more manageable.
    https://www.buildyourcnc.com/images/IMG_6367-800.JPG

    The y-axis limit switches should be located at each end of the gantry. This keeps the switches stationary and impose minimal movement of the wire for better wire management.

    One end of he gantry:
    https://www.buildyourcnc.com/images/IMG_6361-800.JPG

    Other end of the gantry:
    https://www.buildyourcnc.com/images/IMG_6360-800.JPG

    Click the link to respond:
    Were are the mounting locattions of the 6 Limit switches on the Blackfoot 4.3

  • There are no limit switches in my Greenbull 5x10 kit. Are these no longer needed?

    You most definitely should have received limit switches in your package. We will send you the missing limit switches.

    But to directly answer your question; no, limit switches are not needed with CNC machines. You can set up soft limits to make sure the machine does not go out of bounds.

    With that said, if the motors stall for some reason and the computer does not know the actual position of the gantry or the spindle, then the machine may actually go out of bounds and the machine may hit a physical limit. With or without limit switches, the machine will stop.

    Additional Information:
    Please call the office so that we know who you are and we can send the limit switches to the correct person.

    Click the link to respond:
    There are no limit switches in my Greenbull 5x10 kit. Are these no longer needed?

  • Where are the limit switch connections made when the switches are in series, and NC??

    One end of the limit switch circuit will be connected to the pin and NC, and the other end will be connected to COM and GND.

    For example: (the "-" is wire.)

    [Breakout board input pin] ---- ([NC on switch] [com on switch]) ---- [NC on switch] [com on switch] ---- [back to GND on the breakout board]

    An explanation of the limit switch connections is located on the brakout board datasheet: https://www.buildyourcnc.com/item/electronicsAndMotors-parallel-breakout-relay (instruction step # 1.

    Click the link to respond:
    Where are the limit switch connections made when the switches are in series, and NC??

  • Can you provide recommended locations for limit switches on your kits?

    Here are the recommended locations for limit switches for our CNC machine kits.

    The x-axis limit switches should be located on a single gantry. This makes the wiring of the limit switches close in proximity and more manageable.
    https://www.buildyourcnc.com/images/IMG_6367-800.JPG

    The y-axis limit switches should be located at each end of the gantry. This keeps the switches stationary and impose minimal movement of the wire for better wire management.

    One end of he gantry:
    https://www.buildyourcnc.com/images/IMG_6361-800.JPG

    Other end of the gantry:
    https://www.buildyourcnc.com/images/IMG_6360-800.JPG

    Click the link to respond:
    Can you provide recommended locations for limit switches on your kits?

  • When wiring NC limit switches in series to the V5 BOB where are the connections made on the BOB?

    The breakout board has input pins on one side. Use these pins to connect limit switches. The return of the circuit goes to gnd which is located on the same side, where the input pins are located.

    Click the link to respond:
    When wiring NC limit switches in series to the V5 BOB where are the connections made on the BOB?

  • Limit switches connect to AWC708c laser controller

    If you are using the AWC708 or equivalent laser controller, the limit switches will connect between the EL input terminal and the GND terminal in normally open (NO) connection. Most limit switches can be connected as NO, or normally closed (NC).

    For instance, a limit switch for the X- limit will be connected from the ELX- terminal to the NO connection of the limit switch, then a connection from the GND terminal on the laser controller to the COM connection to the same limit switch.

    Click the link to respond:
    Limit switches connect to AWC708c laser controller

Get Help with:
This Product
Orders
Tech Support
Sales
This Product
Order Query
Tech Support
Sales
Not logged in. Log In Register
Track Order(s)
View Order(s)
I Want to Schecule a One-On-One Paid Tech Support Session
Book an Appointment Pertaining to a BuildYourCNC Product (Free)
Ask a Quesion Below (Free):
Book an Appointment Pertaining Other Equipment ($60/half hour)
Book an Immedite Appointment Pertaining Other Equipment ($120/half hour)
Ask a Quesion Below (Free):
Waiting for response... I may not answer immediately, but I was notified on my cellular phone so my response is forthcoming. If I don't respond immediately, you can always go to the [My Account] page to see all of our chats at any time.