How - To Instructions

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Instructions for Glowforge Printer Belts

For all Glowforge printer belt instructions, you will need a 3mm hex key.

Hex Key with padding

Before you do anything, turn off your Glowforge and unplug it.

How to Adjust the Carriage Plate Belt Tension

The belt under the laser arm is attached to the carriage plate and moves the printer head to the left and right. If your belt is too loose or too tight, you can use these instructions to adjust the tension.
1. Turn Off Your Glowforge

Once you have located a 3mm hex key, power off your Glowforge. Open the front door and carefully remove the crumb tray.

2. Locate Laser Arm Pulley

Without removing the carriage plate and belt, locate the black pulley fastened by a metal screw on the right end of the laser arm.

Laser Arm Right Pulley No Crumb Tray
The pulley on the right side of the laser arm. The crumb tray has been removed.
 
3. Insert Hex Key into Pulley

Insert the short side of the 3mm hex L-key into the metal screw with the long handle pointing toward the front of the unit.

Laser Arm Belt Tension 2
The hex key is in the pulley ready to loosen the screw
 
4. Loosen the Pulley

Turn the key clockwise to loosen the screw until the pulley can slide with some friction. Don’t remove the key from the screw.

5. Slide the Pulley to the Right

Holding the key with your one hand, position your other hand to push the pulley to the right until the belt is fully extended.

Laser Arm Belt Tension 3
One hand holds the pulley in place, while the other holds the hex key.
 
6. Tighten the Pulley

While keeping tension with your other hand, turn the hex key counter-clockwise to tighten the screw in the pulley.

7. Check the Belt Tension

When pressing lightly on one side of the belt, the other side should not move. It may take a few tries to get the belt tension correct. If the belt has too much slack, loosen the pulley and try again.

Check-X-Belt-Tension
 
8. Try a Test Print

If you are satisfied with the tension on the belt, try a test print. If you run into trouble, please let us know at support@glowforge.com.

 

How to Replace the Carriage Plate Belt

 
There is a belt under the laser arm that pulls the printer head. To replace the belt attached to the carriage plate, follow these instructions.
 
1. Turn Off Your Glowforge

Once you have located a 3mm hex key, power off your Glowforge. Open the front door and carefully remove the crumb tray.

2. Remove the Printer Head

Holding only the finished black surfaces, grasp the printer head as shown. Pull gently up and back to disengage the magnets and remove the head.

V1 Remove printer head
 
3. Disconnect Cable from Printer Head

Push down fully on the wire ribbon tab to unplug the wire ribbon from the printer head. Pull the wire ribbon gently away and tuck it into the laser arm. Set the printer head to the side.

Connecting Printer Head to Wire Ribbon
 
4. Unhook the Belt from the Pulleys

Placing your thumb between the belt and the laser arm near the right side pulley, push down on the belt while sliding the carriage plate to the right towards the pulley. The belt will slide off of the pulley. Unhook the belt from the left side.

Laser Arm Right Pulley No Crumb Tray
The pulley on the right side of the laser arm. The crumb tray has been removed.
 
5. Remove the Carriage Plate

Place your thumbs on the top of the front wheels of the carriage plate. Support the base of the carriage plate and gently pull it towards you.

Once the front wheels clear the laser arm, gently pull the carriage plate downwards and to the back and it will detach from the laser arm.

Unhook Carriage Plate
Pull the carriage plate forward and down to remove from the laser arm.
 
6. Locate the Belt Screws

Turn over the carriage plate to locate the two socket head screws that hold the belt to the plate.

Locate Carriage Plate Belt Screws
The two screws on the bottom of the carriage plate that hold the belt clamp.
 
7. Remove the Old Belt

Using the 3mm hex key, unscrew both screws from the carriage plate and remove the old belt.

8. Fasten the New Belt to the Carriage Plate

Attach the new belt using the screws you removed from the carriage plate with the hex key. Make sure the belt teeth point to the inside of the belt. The screw on the side of the belt clamp points away from the fan.

CarriagePlateUnderside
 
9. Attach Carriage Plate to Laser Arm

Make sure both sides of the belt on the top of the carriage plate. Place your index fingers on the back corners of the carriage plate and your thumbs on top of the front wheels, hook the rear wheels on the groove on the back of the laser arm. The front wheels should be mostly visible.

Pull the plate forward until the front wheels clear the laser arm then angle the plate up until the the wheels are in line with the rail. Release the plate -- it should grasp the rail firmly.

Attach the Carriage Plate to the Laser Arm
Hook the back wheels on the carriage plate and pull forward to attach to the laser arm
 
10. Attach Belt to the Laser Arm Pulleys
  • Pick up the right side of the belt and make sure it is not twisted. The outside of the belt should be smooth and the inside should have ridges.

  • Hook the belt onto the pulley on the right side and hold in place.

  • Make sure that the left side of the belt is not twisted and is smooth on the outside and ridged on the inside

  • Using your left hand, loop the belt on the front half of the left pulley. The belt will not be fully on the pulley. Use your left thumb and fingers to clamp the belt firmly in place and apply pressure.

  • Still holding the belt and motor firmly with your left hand, use the pressure from your left fingers to guide the belt clockwise around the pulley as your right hand slowly pushes the carriage plate to the left. The belt should roll onto the pulley until it is secure.

Attach the belt to the right pulley
 
Hold the belt to the left pulley
 
11. Check the Belt Tension

Once the belt is in place, check that it is snug and does not sag. When you press on one side of the belt, the other side shouldn't move. If the belt is too loose or too tight you can adjust the tension by following the instructions above.

Check-X-Belt-Tension
 
12. Reinstall the Printer Head

If you are satisfied with the tension on the belt, reconnect the printer head by connecting the white ribbon cable and placing it back onto the carriage plate. Full instructions can be found here: Snap in the Printer Head

Connecting Printer Head to Wire Ribbon
 
V1 Cleaning Remove Printer Head
 
13. Try a Test Print

Now that everything is reconnected, try a test print. If you run into trouble, please let us know at support@glowforge.com.

 

How to Adjust the Side Belt Tension

There is a belt on each side of your Glowforge printer that moves the laser arm. If these belts are too loose or too tight, you can follow these instructions to adjust the belt's tension.
 
1. Turn Off Your Glowforge

Once you have located a 3mm hex key, power off your Glowforge. Open the front door and carefully remove the crumb tray.

 
2. Locate the Pulley

Without removing the belt, locate the black pulley fastened by a metal screw in the back of your Glowforge printer.

Locate the Pulley
 
3. Insert Hex Key into Pulley

Insert the short side of the 3mm hex L-key into the metal screw with the long handle pointing toward the front of the unit.

Insert Hex Key Into Pulley
 
4. Loosen the Pulley

Turn the key counter-clockwise to loosen the screw until the pulley can slide with some friction. Don’t remove the key from the screw.

 
5. Slide the Pulley to the Back of the Printer

Using one hand, slide the pulley towards the back of the printer. It will take some force, the belt should be at full tension.

Slide the Pulley to the Right
 
6. Tighten the Pulley

While keeping tension with your other hand, turn the hex key clockwise to tighten the screw in the pulley.

Tighten the Pulley
 
7. Check the Belt Tension

You can check your other side belt to compare for correct tension. When pressing lightly on one side of the belt, the other side should not move.

It may take a few tries to get the belt tension correct. The tension on each side should feel the same.

Check Side Belt Tension
 
8. Try a Test Print

If you are satisfied with the tension on the belt, try a test print. If you run into trouble, please let us know at support@glowforge.com.

 
 

How to Replace the Black Lid Cable

If you need to replace the black lid cable, follow these instructions.
1. Turn Off Your Glowforge

Turn off and unplug your Glowforge.

Please read these instructions all the way through before moving to the next step.

 
2. Open the Connectors

The cable attaches in 3 spots, and is also connected to the glass.

First, open the left connector gently, like a hinge.

Repeat for the right and middle connectors.

Open the clip
Open the clip gently like a hinge
 
3. Slide the End of the Cable Out of the Slot

Slide the cable straight out of the slot.

Repeat for the right and middle connectors.

Slide the End of the Cable Out
 
4. Remove the Old Cable from the Lid

Once all three ends are disconnected, peel the cable off of the lid.

Peel the Old Cable Off the Lid
 
5. Remove the Remaining Adhesive

This may take a few minutes. We’ve found using a piece of Proofgrade scrap to be useful in scraping away the adhesive. Wipe the surface clean with a dry cloth. The surface does not need to be perfectly clean for the new cable to adhere properly.

Remove the Adhesive 1
 
Remove the Adhesive 2
 
6. Determine the Location of the New Cable

Don’t remove the adhesive backing yet! Determine the location first!

The top of the cable should be about 1/8 inch below the black paint on the lid glass.

Determine the Location of the New Cable
 
7. Locate the Flat Notch on the Lid

Locate the flat notch in the metal case. The black cable should cross at that point, slightly more left than right of center.

Locate the Notch in the Lid
 
Correct Placement in Lid Notch
 
8. Remove Long Adhesive Strip from New Cable

Take your time. Once you're confident on placement: proceed by removing the long strip of backing (but leave the small square on for now).

Remove the Long Strip of Adhesive Backing
 
9. Apply the New Cable to the Lid

Holding on the edges, carefully apply the cable into the position you just planned, remembering that the top of the cable should be about 1/8 inch below the black paint on the lid glass.

Start by sticking the cable down where the vertical part of the cable is positioned across the flat notch, and then smooth outwards to the right and left.

Apply the Cable to the Lid
 
10. Connect the Left End of the Cable

Carefully connect the connector on the left side. Take your time to avoid damage to your Glowforge or the cable.

Insert the end of the cable into the slot as straight as possible. Do not insert the end in at an angle.

Insert the End of the Cable Straight into the Connector
 
Insert the End of the Cable Straight into the Slot 2
 
11. Check For Correct Installation of Left Side

Make sure the small black tabs fit into their groove in the connector.

Check End of Cable
 
12. Secure the End of the Cable

Close the connector gently, like a hinge.

Repeat steps 10-12 for the connector on the right side.

Close the Clip like a Hinge
 
13. Secure the Middle Connection

Once both sides are connected, clip in the middle connector, but still leave the adhesive backing on.

Leave the Adhesive Backing On
 
Secure the Middle Connection
 
14. Remove Small Adhesive Strip

Once the clip is connected, carefully reach in, and remove the backing. Tweezers make this easier, as shown.

Press and rub just above the clip, as indicated by the green arrows.

Remove Small Adhesive Strip
 
Press in Cable
 
15. Check the Installation

Check your work: Look again at each clip to be sure they match the photos of properly closed clips. Make any necessary adjustments.

When everything looks correct: Plug in your Glowforge and turn it on.

Notice -- do the LED strips light up along both sides of the lid? If either side fails to light up: Turn off and unplug your Glowforge. Then unclip, adjust, and reclip the connections on both sides.

When both LED strips light up, login to the app, and print something!

If you run into any trouble, reach out at support@glowforge.com. Please include a detailed description of what happened, we're happy to help!