I'll lay it out point by point so that it's clear as to what Im trying to do, yet, unfortunately, cannot do :-( Firstly, I am using a 1000mm X 750mm Ox CNC Setup, with a dewalt router, with a Spark Concepts Controller board, the Xpro v2 and using Universal Gcode Sender for the communication. outputs on the GRBL board in the following diagram. On the main page of our forum here, there is the J-Tech LaserMode grbl 9g hex download. Checked the switch with an OHM meter and the switch is working properly. 5. Since this is where I ended up after getting a CNC 3018 Pro I thought I'd share some images of the limit switches I used on my machine. Yes, the Z axis homes first, then the X&Y. Pin 1 - X Limit (configurable) Pin 2 - Y Limit (configurable) Pin 3 - Z Limit (configurable) Pin 4 - E-Stop (configurable) Pin 5 - Ground (common ground for all pins) Display panel connector; D-Sub 15 - Jog pendant Input connector They should move correctly depending on direction selected, if not the $3= command allows you to change axis direction without rewiring. Grbl firmware was originally designed for CNC machines and 3D printers, with laser support added more recently. When I try to home the machine the Z axis travels up and when it contacts the Z -Axis home switch it continues into the frame and acts if the switcht is not detected. So I have wired limit switches into my X and Y axis. I entered $23=1. $21=0 I use CNC shield version 3.0 and try to use GRBL 1.1 and the UGS. If you’re using NC switches, you need to tell grbl that by setting $5=1. • Reset select for either GRBL reset or Arduino Reset. Consider yourself warned.The Carbide Updater is a utility to safely flash the latest firmware to your Carbide Motion PCB. The rest of the commands follow more or less the same syntax. $112=5000.000 Suddenly the Z axis referencing does not work. I’d really like to purchase this software if I can make it work. switches I can put anywhere. Using two jumpers the 4th axis can be configured to clone the X or Y or Z axis. I have performed the following troubleshooting steps: 1. If I disconnect it I don't have the problem. Enable Z Axis: turn this on to allow LightBurn to control the Z axis of your machine, IE the height of the laser above the workpiece. I did mine this way just to be safe. If you do not have the Z axis, you can ignore the last value. As per bank 1; Emergency stop and limit switch connector. So positive is the same direction that my UP arrow key on the keyboard takes the Y axis, toward the top of the screen if it was a computer. UPDATE!!! That is, when the Z-axis trigger block hits the switches, the Z-axis will be at its extreme. No I am using the Plain Jane .9J version, pretty sure anyway. It was branched for raster engraving photos with a laser diode. Or you can use 2 switches per axis connected in parallel. It started out, I discovered it would not home unless homing was set to true, which I did. Limit switches board V3 GRBL V1.1. • Screw terminal and JST connectors for easy hookup. I set the working size to the actual usable area in Grbl as well as Lightburn (370x262mm) I placed a small test/calibration image in the center of the work area. to clone the Y axis. I have the problem that grbl does not recognize the limit switch of the Z axis and I found the answer by rereading the characteristics of the various versions of grbl. However, if you have a two axis machine you probably need a positive coordinate space. I have a EleksLaser A3 Pro that I purchased last year. ... v0.9 has split those out but I’m currently not running v 0.9 GRBL. I am confused about how to wire the laser module and also use a Z axis with Z limit stop. It will work fine if vector engraving/cutting though. The switches are normally open and connected to ground. When clicking start, the X axis slams against the opposite end, and the Y axis moves about 2/3 of the way to the opposite end and it starts printing against the side of the frame. So the switches work properly. No matter what command I input, it will not execute. Setting Rev X Rev Y Rev Z It started out, I discovered it would not home unless homing was set to true, which I did. Hello all I hope you can help, I’ve built a cnc using a arduino uno 300 x300, the machine homes fine and works moving on all axis when using grbl but when I disconnect and connect to Easel it will not move on the X/Y axis and only sometimes on the Z. The first time I tried to home, it went in the opposite direction of the switches and hit its mechanical limits. $1=25 $0=10 But X and Y Axis stops no problem. When typing G0 X0 Y0 to find the machine origin, it does the same thing as before, maxing out the X travel and moving 2/3 up the Y. $101=80.000 It makes it easier to work with greater precision and repeatability. The cnc first raises the Z, and then the x axis and Y axis run, but the Y axis is really slow and I need to run the home command many times before it actually hit the switch. $10=0 --Support the x/y/z limit switch, probe interface.--Support external Offline Controller(Optional).--A4988 can be replaced with 8825 driver.--Support X,Y,Z limit switch. This instructable goes through the wiring procedure for using all of the same electronics as if you used an Arduino/RAMPS/GRBL/A (obviously not both. Check your normal direction of x / y with move contols. Probe; length sensor, touch … Working With Homing. For Grbl, it will be "Grbl 1.1f [$ for help]" or similar - this tells you it's Grbl, and which version. $3=1 Limit switches are essentially homing switches doubled up and in addition to setting the origin are used to prevent the motors from hitting the end of each axis which can cause serious alignment problems, potentially serious damage to your Shapeoko, destroy a bit, or ruin a work piece. $21 sets the hard limits for your machine, one that is tested using the limit switches you just installed. For GRBL V 0.9: Take note of the last three Zeros. I am trying to level my spoiler board, i have followed everything as carefully as I can, but when I send the g-code the motor keeps hitting the z axis upper limit switch every time when the code is sent, the motor starts up then raises and hits the limit (z+) If the problem moves to the X axis, the X axis driver chip has the problem. I have tried a number of thing to resolve my homing issue, and now I have made it worse. Finally in the worst case it could be that your controller is not a GRBL board (for example it may have another firmware called BenBox or others) and LaserGRBL is unable to communicate because it is designed to work with grbl (with experimental support for Marlin and Smoothie which are two other firmware). The controller has two 12 to 36V input voltage, one 12V laser output and a … Machines using Grbl 1.1f or later will support the M4 variable power command, and just use the "Grbl" driver in LightBurn. With the power to the machine off, pull the gantry close to where you are sitting (or standing) by your computer. $22=1 4. Feed rate used in the "Homing" cycle to locate the limit switches. Tick these boxes. Variable Spindle, should be disabled within GRbl 1.1 for the Z-limit … Well I am headed out to the shop after supper and just confirm the directions. Ok and close this, then re open it and make sure these settings took hold!!! So I did have the Demo program and it outputs the M03255 command for spindle On CW full 255 speed in this case full output of the laser diode control. I enabled the homing feature in Grbl using $22=1. When each axis triggered it’s respective limit switch that was the 0 position for that axis. Post by jnivard » Sun Apr 30, 2017 9:24 am Hai I am building a small CNC machine using a crostable and I use CNC shield version 3.0 and try to use GRBL 1.1 and the UGS. Now that we have GRBL up and running, it’s time to get the settings for GRBL lined up with our machine. Z Axis Controls. Also my Z axis homes with $23=0 or 1 or 2 or 3 on +/max. When clicking start, the X axis slams against the opposite end, and the Y axis moves about 2/3 of the way to the opposite end and it starts printing against the side of the frame. What am I doing wrong? 5 Y N Y Thanks for taking the time to reply. 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