Stage 04: Gantry

Build the X-Endstop assembly as shown:

X - Endstop

3D Printed X-Endstop Mount

If you find your endstop mount has oversized holes please print the updated part here if able to, or get in touch at info@makertech3d.com for a replacement.

M2.5 x 10mm Cap Head

M4 x 12mm Button Head

M4 T-Nut

Mount the assembly to the inside rear right corner of the frame.

It should be fixed approximately 20mm from the top extrusion.

Note, the endstop is pre-wired.

Fix onto the four LDO motors the vibration dampeners and heatsinks.

M3 x 6mm Cap Head

Vibration Dampener

LDO NEMA 17 Motor

Heatsink

Wipe down the base of the motor to remove any grease from the factory before sticking on the heatsink.

See the next step before installing the motors on the right side of the frame.

Mount the gantry motors as shown with M3 x 6mm Cap Head Bolts.

For easier installation of the enclosure panels we recommend pointing the motor connector ports away from the side of the printer.

When installing the gantry motors onto the right side of the frame ensure that the bolts match as shown, if not they will rub against the belts later on.

Prepare 4 rail mounts as shown by loosely fastening an M5 T-nut onto the M5 bolt.

M5 x 10mm Button Head

M5 T-nut

Keep the orange stoppers in place to prevent the carriage from falling off the rail.

Fix the rail brackets onto the two 410mm long MGN9H rails.

Fix onto the fourth hole from the edge.

M3 x 6mm Cap Head

Mount the rails onto the inside of the top of the frame as shown.

There should be equal distance between the edges of the rails and the frame - around 30mm.

Install the gantry onto the rail carriages.

M3 x 8mm Cap Head

Fasten all bolts loosely before tightening, this will make installing easier.

When the gantry is slid all the way to the right it should bump the endstop as shown.

Remove the orange stoppers to achieve this.

The rail carriage should be on the edge of the rail, but should not fall off.

Make adjustments to the rail and/or endstop mount accordingly if the above conditions are not met.

Mount the final 350mm MGN9H gantry rail onto the gantry.

M3 x 8mm Cap Head Bolt

The rail should have its mounting holes start 15mm from both ends.

Mount the tool carriage onto the gantry rail.

M3 x 6mm Cap Head Bolt

Front of machine.

Take extra care when tightening to not strip the aluminium threads on the carriage.

Fix the Master Plate onto the Tool Carriage.

Master Plate

M2.5 x 35mm Cap Head (Do not over tighten)

M2.5 x 30mm Spacer

Secure the Master Plate in place with two M3 x 6mm Cap Head Bolts.

Start by plugging the USB cable (from the Eddy box) into the top of the Eddy Probe. The cable should route under the spacer.

Fix the Probe to the Master Plate with two M3 x 18mm Cap Head Bolts.

Assemble the Servo mechanism as shown.

Apply grease to both cam shafts.

Makertech Servo Motor

Servo Cam Shaft v2

M5 x 8 x 0.5mm Shim

Red Compression Spring

F605ZZ Bearing

Install the servo mechanism that you built in the previous step onto the Tool Carriage.

Cam pin installed in next step.

Feed it in from behind, ensuring the bearing sits inside the hole on the Master Plate.

M4 x 6mm Button Head Bolt

Install the cam pin with the grub screw pressing onto the flat face of the cam pin.

Use the included bottle of thread locker to ensure the grub screw does not come loose.

Cam Pin

M3 x 4mm Grub Screw

Fix the endstop to the Tool Carriage bracket as shown.

M2.5 x 14mm Cap Head Bolt

M2.5 x 4mm Spacer

Drop pulleys onto each of the four motors.

Orientate so that the pulley teeth are facing downwards.

The ideal position for all of the pulleys should be approx 1-2mm above the end of the motor's shaft. You can align them later after installing the belts.

Ensure that one of the set screws is tightened against the flat of the motor shaft.

Take the 4m roll of GT2 belt and cut approximately it in half.

Take one end of each belt and feed it in through the slit on the back left side of the carriage bracket.

It needs to be fed in from the inside of the bracket - you might need to temporarily remove the bracket from the rail carriage to gain better access.

Ensure that the belts teeth are facing out.

Fix the belt in place with an M4 x 6mm button head bolt and M4 penny washer.

The bottom belt should follow this path around the idlers and motors.

Remember this is the bottom belt and should be wrapped around the bottom level idlers.

The top belt should follow this path around the idlers and motors.

Remember this is the top belt and should be wrapped around the top level idlers.

Adjust these bolts so you are able to pull the belts but also hold the tension without letting the belts slip back.

Pull the belts tight until there isn't any slack.

Next adjust the tension in the belts individually until the gantry sits straight. Use the left side of the frame as a reference.

Avoid over tensioning as this can result in greater vibrations and put unnecessary strain on the motor shafts.

Trim any excess, leaving approx. an inch free for any future adjustments.

With the belts tensioned manually move the tool carriage around to ensure that motion is smooth and that the belts are not catching on anything.

If you have the enclosure upgrade we recommend installing the rear panel now.

Rear Enclosure Panel (Glossy side out)

M4 x 8mm Button Head Bolt

M4 T-Nut

Fix the 9733 part cooling fan to the rear of the frame.

9733 Part Cooling Fan

M4 x 40mm Button Head bolt

M4 x 4mm Spacer

M4 T-Nut

Fix to the rear of the frame the 3D Printed cable relief bracket.

3D Printed Cable relief Bracket

M4 x 12mm Button Head Bolt

M4 T-Nut

Ensure it lines up with the fan opening.

Check the length of your CPAP tube, it should be 60cm long from the end of the silicone rubber side.

If not, use a pair of scissors to cut the open side of the tube to achieve this.

Fix the silicone side of the CPAP cooling hose to the Fan.

Secure it in place with a cable tie.

Slide the cut side of the hose onto the fan shroud.

Fix the fan shroud with the pipe onto the carriage using two cable ties as shown.

Fix to the servo the extension cable.

Wrap all of the cables coming from the Tool Carriage into the remaining length of the braided cable sleeving.

The cables should include: The Eddy USB cable, the Endstop cable and the Servo cable.

Fix the cables to the nylon cable support guide as shown using cable ties.

If you have the enclosure upgrade add the extension cable for the fume filter to the loom here also.

Fume filter fan extension cable - found in the enclosure upgrade bag.

The male side of the cable goes down into the base.

Cable tie the whole loom to the 3d printed bracket.

Attach to the part cooling fan its extension cable and feed and feed it into the cable sleeving.

Finally feed the cable loom into the rear of the base and secure with a cable tie.

Ready to move onto the next stage? Click here.