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Question #: 14533

Question: How are limit switches connected to the AWC708 controller?

Current Solution

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.

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Other Possible Solutions to this Question

  • 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?

  • 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

  • I am using 5 limit switches on my 3 axis machine. I am using the usb controller for planet cnc. I would like to know where all the wires related to the limit switches get connected? A diagram would be helpful.

    The diagram for wiring the USB interface board is located here: https://buildyourcnc.com/item/electronicsAndMotors-electronic-component-USB-Controller-Breakout#prettyPhoto/2/

    Under the board illustration, there are three smaller diagrams of limit switch wiring. On each, there are two connections, the GND and the pin which are labeled at the ends of the circuit on the diagrams. The pin side would go to the axis label ++ or -- terminal (i.e. X++, or X--). The other end, labeled GND would connect to any ground terminal on the board.

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    I am using 5 limit switches on my 3 axis machine. I am using the usb controller for planet cnc. I would like to know where all the wires related to the limit switches get connected? A diagram would be helpful.

  • Using USB Controller Board with Planet-CNC software. The S/W recognizes limit switches but not soft limits. Help?

    "Soft limits are used to decelerate machine to stop before machine is stopped hard way at limit switch or before it crashes. I recommend "Soft Limits Decelerate" and "Soft Limits Strict" settings are also checked. Sometimes we need to disable soft limits and there is a command for this in menu "Machine/Soft Limits". When soft limit is triggered position display will be yellow."

    Are the soft limits "grayed out"?
    Here is a link to a very useful forum post from the Planet-CNC crew:
    http://www.planet-cnc.com/faq/machine_setup/

    Click the link to respond:
    Using USB Controller Board with Planet-CNC software. The S/W recognizes limit switches but not soft limits. Help?

  • 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?

  • 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?

  • How do you install the software for the Mach3 USB controller?

    The Mach3 usb controller/interface has instructions and videos on this page:
    https://www.buildyourcnc.com/item/electronicsAndMotors-electronic-component-breakout-Mach3-USB-Board

    There is a 5 step process on that page to install the plug-in and the configuration xml file that is necessary for the proper functioning of the controller.

    The videos on that page also demonstrate in detail how to install the software, plug-ins, xml file and wiring and testing most of the features of the Mach3 USB interface.

    Hope this helps.

    Click the link to respond:
    How do you install the software for the Mach3 USB controller?

  • 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?

  • 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

  • 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

  • What software is needed to run the laser controller from the PC?

    The laser controller uses software called LaserCAD. You can find the link to the LaserCAD software on the Laser Controller product page:

    https://www.buildyourcnc.com/item/Laser-Component-Laser-Control-System

    Click the link to respond:
    What software is needed to run the laser controller from the PC?

  • 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?

  • how to control the spindle with the usb controller

    To control a spindle using the USB CNC interface, you will need a relay board that contains a transistor that can activate the relay with a power source with enough current that can activate the relay. This video explains all of the information you will need to develop this relay circuit:

    &index=44&list=PLE72E4CFE73BD1DE1

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    how to control the spindle with the usb controller

  • 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.

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

  • How long are the wires on the proximity switches you over

    The NPN proximity switches we stock have 43" (1.09 meters) of cable and the PNP proximity switches we carry have 48" (1.21 meters) of cable.

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    How long are the wires on the proximity switches you over

  • How do you zero the z axis using a plate with the planet-cnc software and your USB controller?

    The instructions on how to use a plate for z-axis homing (moveable sensor) can be found here:

    http://www.planet-cnc.com/faq/moveable_sensor/

    Click the link to respond:
    How do you zero the z axis using a plate with the planet-cnc software and your USB controller?

  • what is the recommended firmware for the awc708c laser controller? I see this download on the Sinjoe site: AWC708 Lite Update Firmware 160901L1

    We have not had any issues with stock firmware on the AWC708lite. Upgrading the firmware will be at your own risk. We can contact our supplier and see if they can provide a suggestion for updating firmware. Contact customerservice@buildyourcnc.com to inquire with a person who can help.

    Additional Information:
    Working area setting

    Additional Information:
    Working area setting

    Click the link to respond:
    what is the recommended firmware for the awc708c laser controller? I see this download on the Sinjoe site: AWC708 Lite Update Firmware 160901L1

  • When using the laser controller, what does "engrave beyond border limit" mean?

    LaserCAD: Engrave beyond border limit.

    This is caused by a sweeping motion that is too fast and where the acceleration is too slow. My recommended action would be to keep the acceleration the way it is and slow down the speed of the engrave sweeping motion. I typically use around 200-300 mm/sec and make sure that the axis sweep motion is the nozzle along the gantry, not the gantry itself. The gantry will have too much inertia to sweep, but the nozzle is very light and can sweep very quickly.

    Specifically, what is happening with the engrave beyond border limit is where that axis is not able to slow down fast enough to not hit the border. For instance, imagine a car going 100 mph and it needs to stop within 30 feet. This would not be possible because the deceleration is not high enough.

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    When using the laser controller, what does "engrave beyond border limit" mean?

  • WHICH WIRES ARE CONNECTED TO THE EMERGENCY STOP BUTTON

    You can use one of the terminals on the input side of the breakout board to connect the e-stop switch.

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    WHICH WIRES ARE CONNECTED TO THE EMERGENCY STOP BUTTON