#Cnc3 3018 Pro Upgrade To Hold

Nunchuk Controlled SainSmart 6-Axis Robotic Arm with Arduino. BE A POWER MAKER$3=5 reverses the X and Z motor rotation, so you can use the same type of cable on all three axes and have them move the way youвЂ™d expect.$20=1 turns on Soft Limits, thereby producing an error when you (or the G-Code) tries to move beyond the machineвЂ™s limits, as defined by the $120 $121 $122 values relative to the Home switch positions.$21=0 leaves Hard Limits off, because I didnвЂ™t see much point in switches on both ends of all the axes for this little bitty machine.$22=1 enables the Home cycle, after which you must start each session by homing the machine.$27=1.000 sets the Pull-off distance from all three Home positions, so the machine ends up at absolute XYZ = -1.000 mm relative to the switch trip points after homing. This depends on the mechanics of the limit switches, but seems OK with the MBI-style switches I used:The Camtool V3.3 board hardwires the DRV8825 stepper controllers into 32 microstep mode, so: 1600 step/mm = (200 full step/rev) Г— (32 microstep/full step) / (4 mm/rev)$110 $111 $112 = 1100 set the maximum speed along the XYZ axes in mm/min.

Lower cost versions of these switches can be purchased from the usual low cost component suppliers such as AliExpress, eBay, and LCSC. The SwitchesFor limit switches I chose the Omron SS-5GL2 mainly because I had enough of them on hand. While not required for use I wanted to add endstops to enable homing and as a safety for making sure the 3018 pro does not try to go outside of its bounds. SAMC21 Development using Visual StudioВ CodeMattdebauge on Tronxy P802M: Controller UpgraвЂ¦Sam Perry on Tronxy P802M: Controller UpgraвЂ¦The CNC 3018 Pro Router (called 3018 pro for the rest of this article) does not come with endstops. You could probably eke out another millimeter along each axis, but this is what I came up with.With all those in place, the G54 coordinate system puts the XY origin dead in the middle of the platform and the Z origin a little bit below its upper travel limit.

The source FreeCAD files have also been uploaded. STL FilesI have uploaded all the STL files ready for 3D printing to Thingivers, PrusaPrinters, and GitHub. Wherever you get them you will need at least 6 but get a few spares just in case.

Unplug the spindle motor and z stepper from the control board. Disassembling the 3018 proWhile the parts are printing the 3018 pro needs to be dissembled slightly to make installation of the hardstops easier. No supports are needed as long as you print the parts as they are oriented in the STL files. These parts are not seeing much load so the settings are not critical but I highly suggest printing these parts with PETG, it is a better material for mechanical parts like these.

Early on in the design I was going to make them slightly different from each other but decided against that.The y endstops are mounted on the right side of the 3018 pro. The y_negative and y_positive are the same part so you can print two of either. Print the y_negative, y_positive, and y_trippers. So the order you connect the limit switches to the controller doesnвЂ™t matter, as long as the x-limit switches are connected to the 3rd and 4th column from the left.This axis is about as easy as the X axis.

We will trim the wire to length after the switches are mounted.Insert the the switches into the y switch mounts and using M5 bolts and drop in tee nuts mount them to the side of the frame that the y tripper is nearly touching. Again 60cm should be more then long enough for the y positive limit switch and the y negative limit switch can be much shorter. Make sure the wires will be long enough to reach the controller when they are installed. Print two 3030_tee_nut if you also donвЂ™t have tee nuts for the bed.Mount the y tripper on the bottom center slot on the right side of the bedSolder wires to the C and NO pins of two switches.

Do the same procedure for mounting the y negative switch.Flip the machine so that it is upright again. Tighten down the switch mount and then move the bed so that it is not activating the limit switch before moving it back to activate the limit switch to check the placement of the limit switch. Attach a multimeter set to continuity mode to the wires of the limit switch and slide the limit switch towards the y tripper until the meter sounds. Wired limit switches in the mountsMove the bed of the machine all the way to the front of the machine, leaving a little space between the linear bearing mounts and the front of the machine frame. Make sure to orient the wires and switch levers as shown in the photos.

Cnc3 3018 Pro Upgrade To Hold

Thread 2 wires through the wire holes on the z_positive and and 2 wires through the holes on the z_negative switch mount. I bundled the wires in 3mm diameter spiral wrap.Mounting the Z axis endstops requires the most modification, you will have to drill and tap a total of 4 holes in the spindle carriage.Print the z_negative, z_positive, and z_trippers using the same filament type and settings as the x and y axes.Cut 4 lengths of 24 AWG wire about 60cm long. I used the cable_clip_ziptiefrom the Prusa Bear upgrade to hold the wires in the track on the bottom of the frame and then to tie them to the side of the frame. I will leave wire wrangling up to you since everyone has their own preferred method. DonвЂ™t route the wires through the back of the frame such that the bed will pinch them when it travels to the y negative extreme.

If possible use a drill press to get this hole perpendicular to the surface. Using a M3 tap drill make a hole all the way through the plastic into the hollow behind it, about 4mm. Whenever I am mounting something like this I prefer to mount it one hole at a time so using a drill or bolt mark the top hole only. First place the z_tripper on the side of the part, there is a lip on the bottom and back side of the part that will help with placement. This requires drilling and tapping two holes in the right side of the spindle mount. Solder the wires to the C and NO pins of the limit switches before placing the switches in the holders.The circled holes will be drilled and tapped for a M5 boltNow to mount the z_tripper.

Again since this is threading into plastic donвЂ™t over torque the bolts.Mount the spindle carriage to the 3018 pro using the same steps you used to remove it but in reverse. With both holes threaded mount the z_tripper using a 8mm long M3 bolts. Bolt the z_tripper on and then mark the bottom hole, drill and tap this hole the same as the top hole.

Comments are after the and can be omitted when sending the commands. Connect the the 3018 pro using your PC and favorite GRBL controller program, I am using bCNC.Open up the command terminal and send the following configuration commands one at a time. Tidy up the wiring.We need to configure the machine to use the endstops now and this requires sending a few configuration commands to the GRBL controller. Connect the wires to the Z-Limit header pins on the PCB. Trim the limit switch wires to length leaving a little bit of slack and crimp on female header pins.

Now send the home command $H. This should trigger an alarm for each of the switches, if not then double check your configuration commands and wiring. Test all the switches before continuing by manually triggering them.