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MillRight M3 KIT Assembly Instructions Manual

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ASSEMBLY INSTRUCTIONS FOR THE MILLRIGHT CNC MODEL M3 KIT
Version 1.11
Important safety rules for operating your MillRight CNC M3:
Never place your hands near a spinning end mill or bit.
Unplug the router before changing cutting tools.
Always wear eye and hearing protection while operating your machine.
Always run dust collection or wear a mask while performing a milling operation.
Do not leave the machine unattended while running a milling operation.
Do not operate your machine while under the influence of alcohol or drugs.
Do not place your hands between the bed and frame while the machine is moving.
Visually inspect wires prior to power up to prevent short circuits.
Ensure work pieces are properly secured before running a milling operation.
Always wear the red tinted safety glasses when operating the laser (if equipped).
Research material considerations prior to machining or lasing (if equipped).
Page 1 of 35

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Summary of Contents for MillRight M3 KIT

  • Page 1 ASSEMBLY INSTRUCTIONS FOR THE MILLRIGHT CNC MODEL M3 KIT Version 1.11 Important safety rules for operating your MillRight CNC M3: Never place your hands near a spinning end mill or bit. Unplug the router before changing cutting tools. Always wear eye and hearing protection while operating your machine.
  • Page 2 Welcome to the assembly instructions for the MillRight CNC Model M3 kit. Assembly will take between eight hours and a weekend depending on your experience, tools, and work pace. Don’t get in a rush. Although you are probably eager to get your machine together, it will pay off to take your time and have fun along the way.

  • Page 3: Wheel Kit Assembly

    Chromed, hardened linear rods, 8mm diameter Linear bearing blocks for 8mm rod Pulleys, GT2 profile, wide (In bag with hardware) (3.14) Meters of GT2 belt, 9mm wide [ (1) 900mm, (1) 1200mm, (1) 1040mm section ] Aluminum spacers, 10 mm long, 8mm OD, 5.1mm ID (for spacing of Z pulleys) (In bag with hardware) Extension spring (In bag with hardware) Hardware set (See the resources section of...
  • Page 4 Y AXIS STAGE ASSEMBLY Locate the Y Axis Bearing plates and (8) of the V wheels that you assembled in the last step. Grab one of the V wheels and one of the Y Axis Bearing Plates. Install an M5 bolt through one of the holes indicated in the picture to the right.
  • Page 5 Using a flat surface, flip the front MDF frame part upside down and slide an M5 washer on a self- drilling screw, then start threading the self- drilling screw into the appropriate hole of the MDF frame. Once the head of the screw starts to poke through the other side, slide the center hole of the 2020 V rail over the screw point.
  • Page 6 Tighten both eccentric spacers an equal amount. These wheels will need very little tightening with the spacer. TAKE VERY CAREFUL NOTE OF THE FOLLOWING, OR YOU WILL CAUSE YOURSELF A PROBLEM LATER. DO NOT OVERTIGTHEN THE V WHEELS INTO THE V RAIL. THE V WHEELS ARE MADE OF A VERY TOUGH PLASTIC (ACETAL OR POLYCARBONTE), BUT THEY WILL DEFORM IF TIGTHENED TOO MUCH, LEAVING YOU WITH CLUNKY MOTION WHICH WILL RESULT IN POOR...
  • Page 7 tightening and alignment easier. Remember that the top frame piece should flush up to the top of the V rail. Make sure it ends up that way when you finish tightening the screws. Now confirm that the rails are close to parallel. This shouldn’t be a problem, but the holes sometimes allow for a bit of a free fit for the screws, so you will want to check this and adjust accordingly.
  • Page 8 Flip the bed back over so the Y Axis Assembly is upside down. Using your hammer, tap the T-nuts into the 16 holes labelled “A” in the above diagram. Now find the Y Axis Belt Anchor Plate. Slide an M6 washer onto an M6x25 screw then put the bolt through the plate in the orientation shown below.
  • Page 9 Assembly upside down and lay it onto the bed so that these bolt heads lay in those recesses. Looking at the bed in the orientation above, the Front Frame Piece should be towards the top. Notice that each Y Axis Bearing Plate has three small holes left.
  • Page 10 position of the holes marked (A) being slightly left of center will help you orient the plate properly. The Z Axis plate was designed to accommodate some of the most popular choices in hobby CNC. Hopefully, you’ve already selected the router/spindle and mount combination that you wish to use.
  • Page 11 bearing, followed by an M5 washer, and then another 625 bearing. DON’T FORGET THE WASHER BETWEEN THE TWO BEARINGS OR THEY WON’T SPIN. Secure all of this with an M5 Nylock nut. You want to get this good and snug, but don’t go crazy.
  • Page 12 split-lock washer, an M6 nut, the loop of the spring, and finally another M6 nut. This screw will also engage the Z axis homing switch, so if you have homing switches you will tweak this position in the slot later. This spring orientation is very important to make sure the spring folds out of the way when your machine lifts Z all the way to the top.
  • Page 13 M5x25 - V Wheel (H) M6x25 - Belt Anchor (T) M5x30 - Belt Idler (T) M3x8 - Motor Bolt (H) M6x40 - X Homing Switch Stud (H) M3x20 – Z Homing Switch (H) M5x16 - Rod Support (H) Let’s go in letter order to get the X Axis Bearing plate built.
  • Page 14 FROM THE BACKSIDE. Slide an M6 split-lock washer onto the bolt, then thread on an M6 nut. Looking down at the X Axis Bearing Plate in the orientation shown in the above diagram, you should see the threads pointing at you, an M6 nut, an M6 split-lock washer, the X Axis Bearing Plate, an M6 flat washer, then the M6 bolt head.
  • Page 15 If you purchased the homing switch kit, you will install the Z axis homing switch with M3x20 bolts in the two holes labelled (F). You’ll need one limit switch, two M3x20 screws, two M3 split-lock washers, two M3 flat washers, and two M3 nuts. Install the switch in the orientation shown in the picture.
  • Page 16 Grab your Z Axis Bearing Plate and your two 8mm diameter chromed linear rods. CAREFULLY slide the rods through the openings in the linear bearing blocks. If the rods seem hard to push through the second bearing, you need to loosen the screws fastening the linear bearing blocks to the Z Axis Bearing Plate.
  • Page 17 You should now have your assembled Z Axis Bearing Plate mounted to your X Axis Bearing Plate. This is the X & Z Axis Bearing Plate Assembly. Before you go any further, check the diagrams again. Did you get the orientation right? Congrats on the progress! We will now route the Z Axis Belt.
  • Page 18 by the bottom red circle in the belt route diagram). It is easiest to do this if the Z plate is all the way at the bottom. Then guide the belt onto the pulley using your index finger. The teeth should be against the pulley bearings on this one.
  • Page 19 Now run it up the middle to loop around the motor pulley, then around the top Z Axis Bearing Plate Idler Pulley, indicated by the top red circle. The toothed side of the belt should mesh with the teeth on the motor pulley and the backside of the belt will run on the top Z Axis Idler Pulley. Keep some tension on this belt to make sure it doesn’t slip off a pulley.
  • Page 20 Now slide the X & Z Axis Bearing Plate Assembly onto the other side of the V Rail extrusion. Continue to support the V Rail Extrusion and place the right frame piece in position. Slide an M5 washer onto a self-drilling screw then place the screw into the top hole.
  • Page 21 Each corner is secured and supported by two cast aluminum corner brackets. Start putting the brackets on one corner at the time, with the bottom bracket first. To complete this step, you’ll need (8) corner brackets, (16) M5x25 machine screws, (16) M5 washers, and (16) regular M5 nuts.
  • Page 22 X and Y AXIS MOTOR MOUNTING and BELT ROUTING The Y Axis motor, belt, and belt idler will be installed first. Grab a NEMA 17 mount and NEMA 17 motor. Install the motor mount onto the front frame. Put an M4x20 bolt through the motor mount slot, then the front of the frame, and secure it to the back side with an M4 flat washer and M4 Nylock nut.
  • Page 23 mesh together. Only leave about an inch of extra belt wrapped around here or you could run out on the other side. See the picture. If you are looking at this with the left frame piece laid flat, you should just have that front most anchor point zip tied on now. Now slide your GT2 motor pulley onto the motor shaft.
  • Page 24 where it needs to be positioned up and down in the slot so that the belt is properly aligned. Note that this corner bracket will have a little wiggle room left and right before it’s tightened as well, so make sure the belt isn’t going to scrub the walls of the opening either when you look for the perfect place to tighten it down.
  • Page 25 split-lock washer, an M5 flat washer, and a regular M5 nut. You will need your needle nose pliers to hold the nut as you tighten up the screw, but wait until you get the belt routed to tighten it up all the way so you can wiggle this pulley around to the right position.
  • Page 26 machine screws, (2) M3 flat washers, (2) M3 split- lock washers, and (2) M3 nuts. The Y axis switch assembly will be built in the orientation shown in the picture to the right. The X switch will have the “L” opposite. See the middle picture on the next page for that switch orientation.
  • Page 27 Now let’s move onto the X Axis Switch. Put an M5 “drop in T nut” into the backside of the X Axis Rail, close to the Right Frame Piece, as shown in the picture to the right. Now install the X Axis Homing Switch just like you did the Y Axis Homing switch.
  • Page 28 Two rods will go through the front of the X Axis Bearing Plate in holes underneath the Y Axis Rails as shown. These rods are going to end up with a washer and a nut tightening against each side of the Front Frame Piece and Rear Frame Piece.
  • Page 29 Please note before we proceed that MillRight CNC does NOT own, develop, or directly support any of the drivers, firmware, or software packages referenced below. These are all provided for free thanks to the generosity of their developers. Since we only have a “user’s level” of knowledge in these programs, we strongly recommend that you reach out to the development community of any program that you may have trouble with or want to learn more about.
  • Page 30 Now insert the red power wire into the “+” terminal and the black ground wire into the “-“ terminal of the CNC shield now. Be careful tightening this terminal down. You want it snug enough that the wires don’t slide out, but if you tighten it too much you will break it.
  • Page 31 The trim pot (it’s next to the enable pin) is adjusted using a small Phillips screwdriver. You have to be VERY careful taking readings. It’s easy to short things if you get sloppy with your lead placement. Put your black lead on the screw that tightened down the ground wire (black wire) on the power connector to the CNC shield.
  • Page 32 that each motor has four wires: blue, yellow, green, and red, in that order. Plug the motors in as such: X Axis: WIRE UP Y Axis: BLUE WIRE UP Z Axis: BLUE WIRE UP If for some reason when you run the machine, movements turn out opposite the way they should (for example if an X+ movement were to move to the left or a Y+ movement were to move the table away from you), then the plug on that axis is backwards.
  • Page 33 Open Universal G Code Sender, Grbl Panel, or your G Code Sender of choice. We are documenting this with Universal G Code Sender Platform. You can download Universal G Code Sender Platform from this link: https://winder.github.io/ugs_website/download/. Scroll down and get “UGS Platform” from the bottom, stable build section. In Windows, unzip the download then run ugsplatform.exe or ugsplatform64.exe from the “bin”...
  • Page 34 X rail on the right frame and move it very so slightly to bring things to square and retighten them. Take a look at the resources page at www.millrightcnc.com/resources to find some video tutorials. You will also gain a lot of knowledge by joining the MillRight CNC forum at www.millrightcnc.proboards.com Happy Machining! Page 34 of 35...
  • Page 35 Troubleshooting Addendum Problem: Universal G Code Sender warns that the machine is in alarm lock whenever a command is issued. Solution: You can type $X into the command line to unlock the machine for movement in the command line. You can also type $H to initiate a homing cycle if you have homing switches which will unlock the machine once complete.