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    • Ox CNC router Build
      • Preparation of V-Slot
      • Wheel Assembly
      • Assembly of Z-Axis
      • Front Carriage Plate
      • Rear Carriage Plate
      • Gantry Sides
      • CNC Gantry Assembly
      • Router Base
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Gantry Sides

Side-plate-parts

For this part of the build we will be using:

2 x Gantry Sides (part of plate set)
14 x Low Profile Screws M5x45mm
22 x Spring Washers
36 x Standard Washers
12 x Eccentric Spacers (6mm)
16 x Aluminum Spacers (6mm)
14 x Precision Shim (10x5x1mm)
14 x Solid-V Wheels kits 

14 x M5 Nyloc Nuts
2 x Nema 23 Motors
2 x Motor Standoffs or 8 x Aluminum Spacers (3mm)
8 x Low Profile Screws M5x25mm
8 x Small Washers
8 x Hex Nuts (M5)
2 x GT3 Aluminum Timing Pulley (20 tooth)

These are the parts for the gantry side, with optional longer inner bolts for adding a inner wheel support at a later date.

Gantry-sides--(1)-OPTIONAL-long-bolts-for-inner-plate-upgrade

Gantry-sides--(2)-spring-washer

Place a spring washer on each of the wheel bolts,

Gantry-sides--(3)-standard-washer

followed by a standard washer.

Gantry-sides--(4)-install-bolts-to-plate

Install seven M5x45mm low profile screws  onto the gantry side plate. Please note we are using the M5x45mm low profile screws as we would like to install a second support bracket at a later stage, which we plan to cut using the Ox itself.

Gantry-sides--(5)-eccentrics-and-6mm-spacers

Install three 6mm eccentrics onto the lower bolts and four 6mm aluminium spacers to the upper bolts.

Gantry-sides--(6)-precision-shim

Install a precision shim onto each wheel bolt.

Gantry-sides--(7)-Solid-V-wheels

Install a solid V wheel onto each bolt.

In the standard Ox build you would then drop on the wheels and M5 nyloc nuts.  We will however be adding another 6mm aluminium spacer to the top four bolts, and 6mm eccentric spacer to the bottom three bolts, in preparation for the upgrade plate to be added later.

Inner Gantry Plate: 

We recommend cutting and installing an inner gantry plate (the 45mm low profile screws required for this upgrade come standard with our kits). The inner gantry plate is not only good for added support, but is also a great way to assist keeping dust and debris away from the wheels and belt. It also provides improvement to the linear guide system as it supports each load bearing wheel from both sides.

Install a 6mm aluminum spacer onto each bolt. The lower three spacers will be replaced with eccentrics at a later date. Once the spacers are installed, the inner wheel support brace would be placed onto the assembly.

Gantry-sides--(8)-OPTIONAL-6mm-spacer

Install a standard washer onto each bolt.

Gantry-sides--(9)-OPTIONAL-standard-washer

Gantry-sides--(10)-nyloc

Install one M5 nyloc nut onto each bolt and lightly tighten so any final adjustments can still be made before fully locking off.

Gantry-sides--(11)-stepper---standard-washers

Install one standard washer onto each of the M5x25mm low profile screws (stepper bolts).

Gantry-sides--(12)-install-stepper-bolts

Drop the bolts and washer into the stepper mounting slots.

Install a length of 20mm x 80mm V-Slot linear rail and adjust the top wheels to be all inline.

Tip: using a second length of V-Slot linear rail to sit along the top side of the top row of wheels helps keep the wheels even while locking off.

Once the top row of wheels are in line, tighten then lightly adjust the bottom wheels to have even tension on the V-Slot. Now when you move the V-Slot linear rail, all the wheels should rotate at the same speed.

Gantry-sides--(15)-pre-tension-eccentrics

Gantry-sides--(14)-Check-clearance-add-shimms-if-needed

Check that the clearance between the head of the stepper bolt and washer stack is clear of the V-Slot. If there is contact or they are too close for comfort, you can either remove the lower washers from the stepper mounting bolts to gain a millimeter more clearance or you can add a second precision shim between the first and each wheel to gain a millimeter.

Here, you can use either the motor standoffs, or 3mm aluminium spacers. Drop the spacer and stepper motor onto the mounting bolts.  

Gantry-sides--(16)-add-stepper

Add a small washer to each bolt,

Gantry-sides--(17)-Small-waser

followed by a spring washer to each bolt.

Gantry-sides--(18)-Spring-washer

Add a hex nut to each bolt and lightly tighten so that adjustment is still possible. The best placement at this point is with the motor as low as possible while still being able to get an hex key to the lower bolts when it is mounted on the V-Slot linear rail.

Gantry-sides--(19)-Nut-or-nyloc

Fit the GT3 pulley to the stepper shaft and light tighten, as it will need adjusting once the timing belt is installed.

Repeat on the other gantry side.

Gantry-sides--(21)-done

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