Mill-right CNC MEGA V XXL User manual
1 of 32
ASSEMBLY INSTRUCTIONS FOR THE MILLRIGHT CNC MEGA V XXL
Version 1.01
For additional resources, see www.millrightcnc.com/resources
Be sure to check the resources page for the most updated assembly instructions.
We have a big online community. Be sure to join in the discussion.
Facebook MillRight CNC Group
Facebook MillRight Mega V Group
MillRight CNC Forum at www.millrightcnc.proboards.com
Important safety rules for operating your MillRight CNC Mega V XXL:
Never place your hands near a spinning end mill or bit.
Always wear eye and ear protection while operating your machine.
Always run a dust collector 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.
Secure long hair and loose clothing so it is not caught in spinning mechanisms.
Ensure work pieces are properly secured before running a milling operation.
Keep a fire extinguisher nearby.
Visually inspect wires prior to power up to prevent short circuits.
The Mega V XXL is a big, heavy machine. Plan on spending a full weekend in assembly and seeking help with moving or
flipping heavy assemblies.
We recommend using a blue thread locker on any fastener not secured with a lock washer or lock nut.
2 of 32
V-Wheels
Parts
V-Wheel Kit
•V Wheel (12)
•608 Bearing (24)
Hardware
V-Wheel Kit
•M8 Washer (12)
Tools
Hard Surface
Something Flat to Press Bearings
On a hard, flat surface, lay out your v-wheels.
Place a 608 Bearing on top of the v-wheel. Using
something flat, such as a wood board, press the
bearing into the top of the v-wheel.
Flip the v-wheel over. Place a M8 washer flat on the 608 bearing inside the v-
wheel. If you forget this step the bearing will not spin correctly. Correcting this
will be difficult.
3 of 32
Place a second 608 bearing on the top of the v-wheel. Press the
bearing into the v-wheel using your impromptu tool. Pinch the inner
races of both bearings with your fingers and test that the v-wheel
spins freely. Repeat this process with the other v-wheels and set them
to the side.
Gantry End Plates
Parts
Left Gantry End Plate
Right Gantry End Plate
X/Y Motor Mount (2)
Assembled V-Wheel (4)
Hardware
M4x12 Machine Screw (4)
V-Wheel Kit
•M8x40 Machine Screw (4)
•M8 Nylock (4)
•Eccentric Spacers (4)
Tools
Phillips Screwdriver
Needle Nose Pliers
13mm Socket or Wrench
Locate the Right Gantry End Plate (pictured above). Place eccentric spacers in the
large holes on the top of the Right Gantry End Plate. The recessed pockets should be
face up. Place a v-wheel on a M8x40 machine screw. Spinning the v-wheel on the
screw will help align the washer allowing wheel to seat on the screw. Insert the
M8x40 Machine screw through the eccentric spacer and secure with a M8 Nylock.
Snug the v-wheel to the plate. Repeat the process on the other side of the Right
Gantry End Plate.
4 of 32
Repeat the Process with the Left Gantry End Plate.
The recessed pockets on the plate should be face
up.
Locate a XY Motor Mount. The mount will be installed on the same
side of the Gantry End Plates as the v-wheels. Place (2) M4x12
machine screws through the back of the Gantry End Plate (opposite
the v-wheels) using the two small holes located between the v-wheels
and install the motor mount. Repeat the process on the other Gantry
End Plate. Place both to the side.
Z Plate
Parts
Z Plate
Z Engager Bracket
Router Mount with Hardware
Anti Backlash Nut with Hardware
Z Rail and Bearings (2)(Box 3 inside of
Single wrapped 1465 extrusion)
Hardware
M3x10 Button Cap (14)
M3x16 Machine Screw (2)
M5x20 Machine Screw (2)
Tools
2mm Hex Key
2.5mm Hex Key
3mm Hex Key
5 of 32
Phillips Screwdriver
Masking/Painters Tape
Locate the anti-backlash nut (ABN). The ABN will come with (2)
M5 nylock nuts, a M5 grub screw, and a M5 jam nut in the bag.
Push the nylocks into the hexagonal holes on the face of the ABN
with the nylon facing up. Screw the grub screw into the top of
the ABN until it touches the bottom. Cap the grub screw with the
M5 jam nut. Place the ABN on the Z Plate and secure using the
M5x20 machine screws. Leave loose. Make sure the nylocks can
be seen.
Locate the z rails with bearings. Please proceed with caution as
the ball bearings can be ejected from the block if the bearings are
slid off the rails. The rails will have plastic or rubber blocks to
keep the bearings from sliding off. Leave them in place until told
to remove them. If the blocks are not present, or for extra
assurance tape both ends of the rails to keep the bearings from
sliding off. Place the z rails on a flat surface with the bearings
face up.
Place the Z Plate on top of the bearings lining up the bearings
with the 4-hole groups on the corners of the Z Plate. The ABN
should be on the same side of the Z Plate as the bearings. Secure
the Z Plate to the bearings using the M3x10 button cap screws.
Leave loose. The bottom 2 holes of the top right 4-hole group will
now get M3x10 button cap hardware. Locate the Z Engager
bracket. Secure the bracket to the Z Plate with M3x16 machine
screws using the two remaining holes on the top right of the Z
Plate. Leave loose.
Locate your router mount. The router mount will have hardware
preinstalled. Remove the 2 button cap screws and washers on
the back of the router mount. Carefully turn the Z Plate on its
side making sure the bearings stay on the rails. Place the screws
with washer through the back of the plate using the 2 remaining
holes. Attach the router to the Z Plate and tighten the router
mount screws. Place your Z Plate to the side.
6 of 32
X Plate
Parts
X Plate
Z Motor Mount
Screw Seat Plate
UHMW Screw Seat
178mm Lead Screw
Assembled V-Wheel (4)
Hardware
M5x16 Machine Screws (2)
M5 Nylock Nut (2)
M4x12 Machine Screw (4)
M4 Split Lock Washer (4)
M3x16 Machine Screw (6)
M3 Nylock Nut (6)
V-Wheel Kit
•Eccentric Spacers (2)
•Standard Spacers (2)
•M8x40 Machine Screw (4)
•M8 Nylock (4)
Tools
Phillips Screw Driver
Needle Nose Pliers
8mm Socket or Wrench
10mm Socket or Wrench
7 of 32
Locate your z screw seat plate and UHMW screw seat. Place the UHMW
screw seat on top of the screw seat plate. Make sure the pocket of the
UHMW screw seat is facing up as shown.
Secure the UHMW screw seat to the screw seat plate using (2) M5x16
Machine screws and (2) M5 nylock nuts. Do not over tighten or you may
deform the UHMW screw seat.
The front of the X Plate is the face with the recessed pockets. The top of the
X Plate is the section with the “U” cutout, as shown above. Place the screw
seat plate on the X Plate near the bottom, center set of holes. Make sure the
UHMW screw seat is pointing towards the top of the X Plate. Place a M4
split lock washer on (2) M4x12 machine screw and insert the screws through
the back of the X Plate to secure the screw seat plate to the X Plate.
Place the Z Plate on the front of the X Plate. Line up the holes on the z rails
with the (3) holes on each side of the X Plate. (2) holes on the top on each
side and (1) hole on the bottom on each side. Carefully remove the top
bearing block or tape on both rails. Insert a M3x16 machine screw in the top
hole on both rails and finger tighten a M3 nylock. Repeat the process with
the second set. Carefully remove the bearing block or tape from the bottom
of the z rails. Insert a M3x16 machine screw in the bottom hole on both rails
and finger tighten a M3 nylock.
Prop the X Plate on its bottom using the router mount. Place eccentric
spacers in the top, large holes on the back of the X Plate. Insert M8x40
machine screws into the large holes in the front of the X Plate and through
the eccentric spacers. Place an assembled v-wheels on the M8x40 machine
screw and secure with a M8 nylock nut.
8 of 32
Place (2) M8x40 machine screws in the large holes in the front of the X Plate
at the bottom. Place standard spacers on the M8x40 screws, assembled v-
wheels, and secure with a M8 nylock nut.
Thread the 178mm lead screw into the ABN. Locate the z motor mount.
Using (2) M4x12 machine screws with M4 split lock washers, attach the z
motor mount to the top of the X Plate.
Z Motor and X Motor Mount Installation
Parts
3675mm Motor
Coupler
X/Y Motor Mount
Hardware
6.35mm Spacer (4)
M4x16 Machine Screw (4)
M4x12 Machine Screw (2)
Tools
Phillips Screw Driver
Locate one 3675mm Motor and coupler. Place the coupler on the 178mm lead screw, allowing it to sit fully on
the lead screw. Place 6.35mm spacers (4) on the mounting holes of the z motor mount. Place the 3675mm
motor with the motor wire positioned to the back of the X/Z assembly, opposite of the router mount, onto the
9 of 32
spacers with the shaft in the top of the coupler. Secure the
Z motor with (4) M4x16 machine screws going first through
the motor, through the spacers, and into the Z motor
mount.
Using a 2mm hex key, tighten the bottom screw of the
coupler. This will connect the coupler to the lead screw.
Make sure the lead screw is fully engaged with UHMW
screw seat and apply light downward pressure. Tighten the
top screw on the coupler. This will attach the coupler to
the motor shaft.
Locate the X/Y motor mount and lower the Z Plate to
expose the two holes near the center top of the X Plate.
Place a M4 split lock washer on (2) M4x12 machine screws.
Insert the screws through the front of the X Plate and
attach the X/Y motor mount to the back of the X Plate.
10 of 32
X Extrusion
Parts
1450 Mega V Extrusion w/Logo (Box 2)
Gear Rack (1)(Box 2)
Drag Chain Supports (2)(Box 1)
Hardware
Large T Nut (14)
M5x12 Button Cap (6)
M5x20 Button Cap (8)
M5 Lock Washers (6)
5/16 x 3/4 Button Cap (8)
Tools
Phillips Screw Driver
3/16 Hex Key
3mm Hex Key
13mm Wrench
Get one section of gear rack. Place (8) M5x20 Button
cap screw through the holes of the gear rack keeping
the screw uniform. Spin a large t nut a few turns on
each screw. Leave the t nuts loose.
Slide the t nuts into the top of the Mega V extrusion
with the gear rack teeth pointing towards the back of
the extrusion. The Logo is on the front of the
extrusion. Leave the rack loose.
11 of 32
Retrieve the x/z assembly. The v-wheels will pinch the outside
of the Mega V extrusion using the v shaped slots on the top and
bottom. If the v-wheels are too tight to slide on the extrusion,
use a 10mm wrench to turn the eccentrics until the assembly
slides onto the extrusion.
Slide (6) large t nuts into the bottom slot of the Mega V
extrusion.
Retrieve the left end plate. On the left side of the extrusion, use
5/16 x 3/4 button cap screws to attach the left end plate to the
extrusion. Repeat the process on the right side with the right
end plate.
Tilt the gantry forward to gain access to the bottom. Using (6)
M5x12 button cap with M5 split-lock washers and the already
installed large t nuts, attach (2) drag chain supports. The drag
chain supports need to be positioned on the right side of the
gantry as seen from the front with the slotted ends pointed out
towards the end plates. Leave loose. Please be careful not to
bend the drag chain mounts. Set the gantry to the side.
12 of 32
Subframe Assembly
Parts
1465mm long extrusions (4)
1450mm long extrusions (2)
Gussets (4)
Foot Plates (4)
Leveling Feet (4)
Hardware
Inside corner joiners (16)
M5x8 Machine Screws (16)
Drop-in T Nuts (16)
5/16x3/4”Screws (8)
Tools
Phillips Screw Driver
3mm Hex Key
3/16 Hex Key
The subframe has 1465mm extrusion (crossmembers) running left to
right with 1450mm extrusion running front to back. The 1465mm
crossmembers will receive corner joiners and slide into the 1450mm
(left and right) extrusion pieces.
Slide the inside joiners into place on the 1450mm extrusions and then
slide the crossmembers onto them as shown. Note that the inside
joiners will only allow the pieces to set flush when inserted one way.
There are set screws (included in the bag with the corner joiners) that
hold the joiners in position.
13 of 32
The edge of the frontmost crossmember should be
about 422 millimeters from the edge of the “middle-
front”crossmember. The four crossmembers are NOT
placed equidistant from one another. Placing them
with the spacing described will allow you to use the
bed design file that we have provided. Use a square, if
available, to set the 1465mm crossmembers square to
the 1450mm extrusions. Also, make sure the front and
rear 1465mm crossmembers are flush with the edges
of the 1450mm extrusions.
14 of 32
Place four gussets in the inside four corners of the frame
you just created. Put the gusset into position and take
note of where the holes are. Pull the gusset away and put
drop in T nuts there.
Secure it with M5x8 machine screws. Blue thread locker is
recommended.
Once completed, your frame should look similar to the picture shown below.
15 of 32
Leg installation
Parts
Gussets (16)
760mm Leg Extrusions (4)
(2) 1330mm extrusions (2)
Hardware
Inside corner joiners (16)
M5x8 Machine Screws (64)
Drop-in T Nuts (64)
Tools
Phillips Screw Driver
Note that one side of these leg extrusions
has two threaded holes. When you install
these, the tapped holes should be away
from the frame you just built.
Gather 8 more gussets. Loosely install them
(just finger tight on the screws) to the frame
assembly you just completed such that
they’ll rest on the sides of the legs.
Position one of the legs (remember, with the
tapped holes facing UP and away from the
frame assembly against the gussets. Slide
drop-in T nuts into the legs and secure the
gussets with M5x8 machine screws. Make
sure the leg flushes up to the edges of the
frame. It will take some adjusting, loosening,
and re-tightening to get it right. Once
correct, tighten all to final torque. Repeat
this for all four legs.
16 of 32
Gather 8 more gussets. Position them as shown on the legs. The
exact height of the top flange of the gusset is not critical so long as
all eight are at the same height, but we recommend around
430mm. This step will be easiest if you use one or two sections of
wood or other material that are about this length.
Gather (2) 1330mm extrusions and (8) inside corner joiners. Place
the inside corner joiners into the ends of the 1330mm extrusions
as shown below.
If you made spacing blocks, leave them in place as you slide the
corner joiners you already placed in the 1330mm extrusion down
into the leg pieces.
Add drop in T nuts and secure the gussets to the 1330mm extrusions
with M5x8 screws. Do this for both 1330mm extrusions.
17 of 32
Your frame assembly should now look like the below picture.
Gather the remaining (2) 1450mm extrusions and install those
the same way you did the 1330 extrusions. Start by installing
the inside corner joiners on the ends of the 1450mm extrusion,
then slide them down into the legs.
Using positioning blocks can be helpful here as well to make
sure you have the 1450mm and the 1330mm extrusions on the
same plane.
Add drop in T nuts to the 1450mm extrusion, secure the
gussets to them using M5x8 machine screws, and put a final
torque on the inside corner joiners.
18 of 32
As mentioned previously, the legs should be installed such that the two threaded holes are exposed (facing
up).
Gather the (4) foot plates, (4) leveling feet, and (8) 5/16x3/4”screws. Take note of the position of the
threaded holes, then secure the foot plates onto the end of the legs. Do this for all four legs. Then thread the
leveling feet down into the center hole of the foot plate.
Enlist a couple of helpers, such as neighbors who will be jealous of your MillRight CNC Mega V XXL and want to
buy one too, to assist you in flipping the frame assembly right-side-up. Once flipped over, your frame should
look like the picture. Don’t be concerned yet about adjusting the leveling feet.
19 of 32
Y Bearing Rail Construction
Parts
Gear Rack (2)
Mega V Extrusions (2)
Y end plates (4)
Hardware
M4x12 Button Cap Screws (8)
M5x20 Button Cap Screws (16)
Drop-in T Nuts (8)
Large T Nuts (16)
5/16x3/4”Button Cap Screws (32)
Tools
3mm Hex Key
3/16 Hex Key
Phillips Screw Driver
13mm Wrench
Take note that your drag chains are stuffed inside of these
extrusions. Do not proceed until you pull them from these
extrusions.
Using slide in T nuts and M5x20 button cap screws, install the
remaining two gear racks onto the remaining two 1450mm Mega V
extrusions.
Put the M5x20 button caps through the holes in the gear rack, then
spin on the slide in T nuts a couple of turns. Slide them into the
tracks in the extrusion, just as you did on the gantry rail. Make sure
the teeth face to the outside of the extrusion. Don’t worry about
the exact position of the gear rack yet. You will adjust these at a
later step. Just tighten down a couple of screws now to keep the
rack from sliding.
20 of 32
Install the (4) Y end plates onto the ends of the 1450mm 6060
extrusion using 5/16x3/4”screws and shown. Use (4) of these
screws for each plate. Do not tighten them down yet or it will make
the next step more difficult.
Install the Y bearing rails onto these plates. Use a helper or
appropriately sized spacer block to support one end while you
position the other end to match up with the holes in the Y end
plate.
You must install these so that the gear rack you already installed
are on top and the teeth are facing OUTBOUND. See the bottom
right picture.
Thread a couple 5/16x3/4”button cap screws into each one to
secure them in place. Once you get good thread engagement, do
the same on the other side of the rail.
Spend some time making sure everything is straight, then tighten all
the 5/16x3/4”button cap screws.
