ooznest OX CNC User manual

OX CNC 1
OX CNC
Assembly Instructions

OX CNC 2
Table of Contents
1.0 Getting Started 3
1.1 About The Kit 4
1.2 Check Product Contents 4
2.0 Assembly 6
2.1 Wheel Assembly 7
2.2 Side Plates 8
2.2.2 Wheel & Brace Assembly.............................................................. 9
2.3 X-Carriage Assembly 11
2.3.2 Front Plate Wheel Assembly Part 1 .............................................. 12
2.3.3 Front Plate Wheel Assembly Part 2 .............................................. 13
2.3.4 Attaching Back Plate Motor......................................................... 14
2.3.5 Mating Front & Back Plates......................................................... 15
2.4 Z Axis Assembly 17
2.4.2 Attaching V-Slot........................................................................ 18
2.4.3 Attaching ACME-Lead-Screw....................................................... 19
2.4.4 Threaded-Rod-Mount-Bottom...................................................... 20
2.5 X Gantry Assembly 21
2.5.2 Tee-Nuts & Carriage .................................................................. 22
2.5.3 Angle-Corners .......................................................................... 23
2.6 Base Assembly 24
2.6.2 Y-End-Plates............................................................................. 25
2.6.3 V-Slot Positioning - 2................................................................. 27
2.6.4 Y-End-Plates - Final Bolts ........................................................... 28
2.6.5 Angle-Corners .......................................................................... 29
2.6.6 Spoiler Board Support - 1 .......................................................... 30
2.6.7 Spoiler Board Support - 2 .......................................................... 31
2.6.8 End-Caps................................................................................. 32
2.7 GT3-Pulley & Belt Assembly 33
2.7.2 Tee-Nuts.................................................................................. 34
2.7.3 GT3-Timing-Belt ....................................................................... 35
2.7.4 Securing the GT3-Timing-Belt ..................................................... 36
2.7.5 Repeat .................................................................................... 37
2.8 Face-Plate 38
2.9 Complete 39
3.0 Appendix 40
3.1 Appendix A - Kit Contents 41

OX CNC Getting Started 3
1.0 Getting
Started

OX CNC Getting Started 4
1.1 About The Kit
The ooznest OX CNC Machine Kit is based on the OX CNC Machine designed by Mark Carew
of Openbuilds (http://www.openbuilds.com/builds/openbuilds-ox-cnc-machine.341/), and in-
corporates many upgrades from the Openbuilds community. Mark Carew based the OX on the
Routy, which was in turn based on the Shapeoko. The OX CNC Machine uses the excellent V-
Slot Extrusion, which provides a strong, smooth, and accurate linear motion system.
We would like to give a big thank you to Mark Carew and Openbuilds for designing an excel-
lent CNC Machine and V-Slot system, which they have allowed to be freely shared, remixed,
and sold. We would also like to thank the Openbuilds and wider community for sharing their
upgrades to make the OX even better.
1.2 Check Product Contents
The first thing you should do when you receive your kit is to check the contents against the
list in Appendix A. For small parts, a few more spare is included than the quantity shown in
Appendix A. If anything is missing or damaged or you have any other problems, please con-
tact us at [e-mail], and we will aim to resolve the issue as quickly as possible.
1.3 Tools Required
The list below shows the main tools that will be required to complete this build:
•1.5mm Allen key (Provided)
•2.5mm Allen key
•4mm Allen key
•8mm spanner
•10mm spanner
1.4 Notes on Assembly
It is recommended that you read through the whole manual before beginning the build. This
is so you can get a rough idea of how it all goes together. Before starting each step make sure
you have studied the diagram and fully understand what you are doing at each step. The PDF
version of the manual is available on our website. Use it if needed. This will allow you to zoom
in on the diagrams.
This instruction manual follows Mark Carew’s build videos on the Openbuilds website. Use his
videos if needed to gain a different look into each step. The videos can be found at: http://
www.openbuilds.com/builds/openbuilds-ox-cnc-machine.341/
When attaching parts, make sure they are sensibly squared and aligned. Everything should
easily fit together. If a part is requiring significant force to attach, then stop, take it off, re-
read the instructions, and try again. Do not overtighten bolts, as you may strip the threads.
If you forgot to insert a Tee-Nut when instructed, there is no need to worry or undo any of
the work you have done. In the kit we have included 5 x M5-Drop-In-Tee-Nuts for this situa-
tion. These M5-Drop-In-Tee-Nuts do not have to be inserted from the end of the extrusion.

OX CNC Getting Started 5
Simply place them in the V-Slot, then screw in the bolt which will turn them and engage
them into the underside of the V-Slot.

OX CNC Assembly 6
2.0 Assembly

OX CNC Assembly 7
2.1 Wheel Assembly
A. With a Precision-Shim in between, insert a 625-2RS-Bearing into either side of the Solid-
V-Wheel-Xtreme.
B. Repeat this for all 30 Solid-V-Wheel-Xtremes.

OX CNC Assembly 8
2.2 Side Plates
2.2.1 Attaching Motor
A. Attach a NEMA23-Stepper-Motor to one of the Y-Plates using 4 x M5-Low-Profile-20mm
Bolts and 4 x M5-Nyloc-Nuts. Make sure you place an Aluminium-Spacer-Eighth-Inch in-
between the NEMA23-Stepper-Motor and the Y-Plate. The NEMA23-Stepper-Motor should
be orientated so the side that the wire is coming from is facing toward the back of the Y-
Plate (the straight vertical side).
B. Only loosely tighten the bolts for now. These will be tightened later once the GT3-Belt has
been attached. Make sure the M5-Low-Profile-20mm Bolts are sitting on the bottom sur-
face of the elongated holes.

OX CNC Assembly 9
2.2.2 Wheel & Brace Assembly
A. First attach the top right Solid-V-Wheel-Xtreme in between the Y-Plate & Y-Brace using
the components shown above. Note that the top row of the wheels uses Aluminium-
Spacer-Quarter-Inches. Only screw the M5-Nyloc-Nut on the end of the M5-Low-Profile-
40mm a small amount so the rest of the wheels can be attached.
B. Repeat Step A for the bottom right wheel. Note that the bottom row of the wheels uses
Eccentric-Spacers. The rounded section of the Eccentric-Spacer should be inserted into
either the Y-Plate or Y-Brace, depending on which side of the wheel it is. Again, only
attach the M5-Nyloc-Nut a small amount.
C. First repeat Step B for the other 2 wheels on the bottom row, then repeat Step A for the
other 3 wheels on the top row.
D. Once all the wheels are attached, they can be tightened down. However, make sure they
still rotate freely. For the bottom row of wheels, leave these slightly loose, and initially set
both Eccentric-Spacers on all 3 wheels so the divot on the side is facing downwards. This
is shown on the Eccentric Spacer Bottom View. Doing this maximizes the gap between the
top and bottom row of wheels.
E. Run any piece of 20x80mm V-Slot Extrusion in-between the two rows of wheels. Initially
the V-Slot should wobble in between the wheels. Push the V-Slot up against the top row
of wheels and adjust the Eccentric-Spacers on the bottom wheels so the V-Slot runs
smoothly without any wobble. There should be a small amount of friction. Make sure that,
when adjusting the Eccentric-Spacers, the divots on each side of the wheel are kept in-
line– i.e whatever is done to one side of wheel should be done to the other.

OX CNC Assembly 10
F. Once you’re satisfied, the bottom row of wheels can be tightened down. Once tight,
recheck that the 20x80mm V-Slot still runs smoothly.
2.2.3 Repeat
A. Repeat Section 2.2 for the other Y-Plate. However, this time it should be a mirror image of
the first Y-Plate, as shown in the image above.

OX CNC Assembly 11
2.3 X-Carriage Assembly
2.3.1 Front Plate Spacer Blocks
A. Attach one Spacer-Block to the X-Plate-Front using 2 x M5-Low-Profile-10mm’s. The bot-
tom of the Spacer-Block should be flush with the bottom for X-Plate-Front.
B. Repeat Step A for the second Spacer-Block.

OX CNC Assembly 12
2.3.2 Front Plate Wheel Assembly Part 1
A. First, attach the top left Solid-V-Wheel-Xtreme onto the Spacer-Block using the compo-
nents shown above. Note that the left row of wheels uses Aluminium-Spacer-Quarter-
Inches. The wheel can be tightened down, but make sure it still rotates freely.
B. Repeat Step A for the top right wheel. Note that the right row of wheels uses Eccentric-
Spacers. The rounded section of the Eccentric-Spacer should be inserted into the Spacer-
Block. The wheel can be tightened down, but leave it slightly loose and initially set the
Eccentric-Spacer so the divot on the side is facing right.
C. Repeat Step A for the other 2 wheels on the left row, and repeat Step B for the other 2
wheels on the right row.

OX CNC Assembly 13
2.3.3 Front Plate Wheel Assembly Part 2
A. First, attach the top left Solid-V-Wheel-Xtreme to the X-Plate-Front. Note that the order
of the spacers for this wheel should be (starting from the X-Plate-Front): Aluminium-
Spacer-6mm, Aluminium-Spacer-6mm, Aluminium-Spacer-Quarter-Inch, Precision-Shim.
The wheel can be tightened down, but make sure it still rotates freely.
B. Attach the top right Solid-V-Wheel-Xtreme to the X-Plate-Front. Note that the order of the
spacers for this wheel should be (starting from the X-Plate-Front) Eccentric Spacer, Alu-
minium-Spacer-6mm, Aluminium-Spacer-6mm, Precision-Shim. The wheel can be tight-
ened down, but leave it slightly loose, and initially set the Eccentric-Spacer so the divot
on the side is facing right.
C. Run any piece of 20x60mm V-Slot Extrusion in-between the two rows of wheels. Initially
the V-Slot should wobble in-between the wheels. Push the V-Slot left against the left row
of wheels, and adjust the Eccentric-Spacers on the right wheels so it runs smoothly with-
out any wobble. There should be a small amount of friction.
D. Once you’re satisfied, the right row of wheels can be tightened down. Once tight, recheck
that the 20x60mm V-Slot still runs smoothly.
E. Attach the ACME-Nut-Block to the X-Plate-Front. The M5-Nyloc-Nuts go into the insets
and should be facing away from the X-Plate-Front.

OX CNC Assembly 14
2.3.4 Attaching Back Plate Motor
A. Attach a NEMA23-Stepper-Motor to the X-Plate-Back using 4 x M5-Low-Profile-20mm
Bolts and 4 x M5-Nyloc-Nuts. Make sure you place an Aluminium-Spacer-Eighth-Inch in
between the NEMA23-Stepper-Motor and the X-Plate-Back. The NEMA23-Stepper-Motor
should be orientated so the side that the wire is coming from is facing downwards.
B. Only loosely tighten the bolts for now. These will be tightened later once the GT3-Belt has
been attached. Make sure the M5-Low-Profile-20mm Bolts are sitting on the bottom sur-
face of the elongated holes.

OX CNC Assembly 15
2.3.5 Mating Front & Back Plates
A. First, attach the top right two Solid-V-Wheel-Xtremes in between the X-Plate-Front and X-
Plate-Back using the components shown above. Note that the aluminium spacers used in
between the two wheels is an Aluminium-Spacer-6mm and the aluminium spacers used
on the outer side of the wheels are Aluminium-Spacer-Quarter-Inches. Only screw the
M5-Nyloc-Nut on the end of the M5-Low-Profile-65mm a small amount so the rest of the
wheels can be attached.
B. Repeat Step A for the bottom right wheel. Note the bottom row of wheels use Eccentric-
Spacers on the outside. However they still use an Aluminium-Spacer-6mm in between the
wheels. The rounded section of the Eccentric-Spacer should be inserted into either the X-
Plate-Front or X-Plate-Back, depending which side of the wheel it is. Again, only attach
the M5-Nyloc-Nut a small amount.
C. First repeat Step B for the bottom left wheel, and then repeat Step A for the top left
wheel
D. Once all the wheels are attached, they can be tightened down. When doing this, place the
bottom of the assembly flat on a table to make sure the X-Plate-Front and X-Plate-Back
are square with each other. Make sure the wheels still rotate freely. For the bottom row of
wheels, leave these slightly loose, and initially set both Eccentric-Spacers on both wheels
so the divot on the side is facing downwards. This is shown on the Eccentric Spacer Bot-
tom View. Doing this maximizes the gap between the top and bottom row of wheels.
E. Simultaneously, run 2 pieces of 20x60mm V-Slot Extrusion in between the two rows of
wheels on both sides. Initially the V-Slot should wobble in between the wheels. Push the

OX CNC Assembly 16
V-Slot up against the top row of wheels and adjust the Eccentric-Spacers on the bottom
wheels so the V-Slot runs smoothly without any wobble. There should be a small amount
of friction. Make sure that, when adjusting the Eccentric-Spacers, the divots on each side
of the two wheels are kept in-line where possible– i.e whatever is done to one side should
be done to the other.
F. Once satisfied, the bottom row of wheels can be tightened down. Once tight, recheck that
2 x 20x60mm V-Slot still runs smoothly.

OX CNC Assembly 17
2.4 Z Axis Assembly
2.4.1 Motor Assembly
A. Slide the 1/4” side (the side with the smallest hole) of the Flexible-Coupler onto the shaft
of the NEMA23-Stepper-Motor. Don’t tighten it down at this point.
B. Then attach the NEMA23-Stepper-Motor to the Threaded-Rod-Mount-Motor. Make sure
the inset for the 688ZZ-Bearing is facing away from the NEMA23-Stepper-Motor.

OX CNC Assembly 18
2.4.2 Attaching V-Slot
A. Attach the V-Slot-2060-200mm to the Threaded-Rod-Mount-Motor using 3 x M5-Low-Pro-
file-10mm. For the middle bolt, the short end of the Allen key may need to be used. Leave
these bolts initially loose so the Threaded-Rod-Motor-Mount can be adjusted forward and
backwards.

OX CNC Assembly 19
2.4.3 Attaching ACME-Lead-Screw
A. Thread the ACME-Lead-Screw through the ACME-Nut-Block on the X-Carriage about half
way. Then slide a 8mm-Lock-Collar and a 688ZZ-Bearing on to the ACME-Lead-Screw.
B. Slide the Z-Axis through the front set of wheels on the X-Carriage in the orientation
shown above. Slide it on until the ACME-Lead-Screw goes into the Flexible-Coupler and is
touching the shaft on the NEMA23-Stepper-Motor.
C. Slide the 688ZZ-Bearing down the ACME-Lead-Screw until it seats into the inset on the
Threaded-Rod-Mount-Motor. Push the 8mm-Lock-Collar down on top of the 688ZZ-Bear-
ing, and lock it in place with the grub screw.
D. The top of the X-Plate-Front on the X-Carriage needs to be just touching the Threaded-
Rod-Mount-Motor. If it isn’t, the Threaded-Rod-Mount-Motor can be moved up or down by
turning the ACME-Lead-Screw in the appropriate direction.
E. Once they are touching, make sure the back edge of the Threaded-Rod-Mount-Motor is
square with the V-Slot-2060-200mm, and tighten the M5-Low-Profile-10mm bolts
attached in the previous section.

OX CNC Assembly 20
2.4.4 Threaded-Rod-Mount-Bottom
A. Slide a 8mm-Lock-Collar and 688zz-Bearing onto the ACME-Lead-Screw.
B. Attach the Threaded-Rod-Mount-Bottom on to the Z-Axis using 3 x M5-Low-Profile-10mm
bolts. Only loosely tighten. The 688ZZ-Bearing should sit in the inset on the side of the
Threaded-Rod-Mount-Bottom.
C. The bottom of the X-Plate-Front on the X-Carriage should be just touching the Threaded-
Rod-Mount-Bottom to move the Z-Axis up or down turn the ACME-Lead-Screw in the
appropriate direction. Once in position, square the Threaded-Rod-Mount-Bottom with the
V-Slot-2060-200mm, and tighten the M5-Low-Profile-10mm bolts.
D. Push the 688ZZ-Bearing into the inset on the Threaded-Rod-Mount-Bottom, and secure
the 8mm-Lock-Collar on top.
E. The Flexible-Coupler can now be locked in place. Make sure one of the grub screws is on
the flat section of the shaft on the NEMA23-Stepper-Motor and that the ACME-Lead-Screw
and motor shaft are touching.