¶ XY Motor
The XY motors are installed on the back of the printer and are used to drive the toolhead for movement in the X and Y directions. There is one motor on the left and one on the right. For easy identification, they are referred to as motor A and motor B based on their positions.
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The spare parts for the XY motor include the following:
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Motor * 1
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MK3x6 screw - used to fix the motor * 4
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M3x6 screw - used to fix the motor bearing bracket * 2
¶ When to use
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The motor is burnt out.
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Confirmed by Bambu Lab technical support that the motor needs to be replaced.
¶ Tools and Materials Needed
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New X/Y motor
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H2.0 Allen key
It is recommended to prepare a longer Allen key (length should be greater than 122 mm).
Screw Specifications and Quantities Involved in the Installation/Removal Process:
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BT3×8 screw - used to fix the rear panel × 12
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ST3×6 screw - used to fix the rear panel × 11
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ST3x12 screw - used to fix the spool holder bracket × 2
¶ Safety Warning
IMPORTANT!
It's crucial to power off the printer before conducting any maintenance work, including work on the printer's electronics and tool head wires. Performing tasks with the printer on can result in a short circuit, leading to electronic damage and safety hazards.
During maintenance or troubleshooting, you may need to disassemble parts, including the hotend. This exposes wires and electrical components that could short circuit if they contact each other, other metal, or electronic components while the printer is still on. This can result in damage to the printer's electronics and additional issues.
Therefore, it's crucial to turn off the printer and disconnect it from the power source before conducting any maintenance. This prevents short circuits or damage to the printer's electronics, ensuring safe and effective maintenance. For any concerns or questions about following this guide, we recommend submitting a technical ticket regarding your issue and we will do our best to respond promptly and provide the assistance you need.
¶ Replace the XY Motor (A)
¶ Remove the XY Motor (A)
¶ Step 1: Remove the rear panel and purge chute
You can refer to this Wiki to remove the printer's rear panel and purge chute:
¶ Step 2: Remove the XY belt tensioner
- Use an H2.0 Allen key to remove 2 tensioner pressure plate fixing screws (M3x6) and 2 tensioner bracket fixing screws (M3x6).
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- Push the XY belt tensioner out of its snap-fit with a firm force.
This step requires a bit of effort.
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¶ Step 3: Remove the XY motor (A)
To facilitate motor replacement, 2 small holes have been made on the top cover to allow the Allen key to pass through and remove the fixing screws for Motor A.
Note: Since the motor fixing screws are tight, it is recommended to use a sturdy Allen key for removal.
- Locate the 2 small holes on the top frame corresponding to the 2 inner fixing screws of motor A. Use the H2.0 Allen key to puncture the foam and remove the 2 inner fixing screws (MK3x6). Then, use the H2.0 Allen key to remove the other 2 fixing screws (MK3x6).
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- Use the H2.0 Allen key to remove 2 motor bearing bracket fixing screws (M3x6).
- First, use tweezers to remove the silicone from the motor connector, then disconnect the motor connector from the MC board and pull the motor connector out of the cable channel.
- Pull the motor bearing bracket out of the printer frame, remove the belt from the driving wheel, then tilt the motor and remove it from the frame.
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¶ Install the XY Motor (A)
¶ Step 1: Install the XY motor (A)
- Align the motor connector exit with the back of the printer, pass the motor connector through the grommet and frame hole, and pull out some of the cable. Tilt the motor through the frame hole, loop the belt onto the pulley of the XY motor (A), and insert the motor bearing bracket with its notch aligned to the frame pin.
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- Hold the motor in place and use the H2.0 Allen key to tighten the 2 motor bearing bracket fixing screws (M3x6). First, tighten the 2 front motor fixing screws (MK3x6), then use a longer H2.0 Allen key to tighten the 2 rear motor fixing screws (MK3x6).
- Secure the motor connector into the cable clip and connect it to the MC board.
¶ Step 2: Install the XY belt tensioner
- Insert the spring into the tensioner bracket shaft, then insert it vertically into the printer frame. Push the tensioner firmly to the left to snap it into place.
- After aligning the tensioner pressure plate with the screw holes, use an H2.0 Allen key to tighten the 2 pressure plate fixing screws (M3x6) and the 2 tensioner bracket fixing screws (M3x6).
¶ Step 3: Install the purge chute and rear panel
You can refer to this Wiki to install the purge chute and rear panel:
¶ Replace the XY Motor (B)
¶ Remove the XY Motor (B)
¶ Step 1: Remove the rear panel, purge chute, and AC board cover
You can refer to this Wiki to remove:
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Rear panel
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Purge chute
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AC board cover
Since replacing the X/Y Motor (B) does not involve disassembling the AC board, you can skip the steps related to the AC board:
Replace H2D AC Board/AC board Cover
¶ Step 2: Remove the XY belt tensioner
- Use an H2.0 Allen key to remove 2 tensioner pressure plate fixing screws (M3x6) and 2 tensioner bracket fixing screws (M3x6).
- Push the XY belt tensioner out of its snap-fit with a firm force.
This step requires a bit of effort.
¶ Step 3: Remove the 4pin interface board
To facilitate the installation of the XY motor (B), a small hole is reserved on the top of the left liner (behind the 4pin interface board), so you can remove the 4pin interface board first to facilitate the subsequent replacement of the XY motor (B).
Disconnect the cables from the 4pin interface board, use an H1.5 Allen key to remove 2 fixing screws (BT2x5), and then remove the 4pin interface board.
¶ Step 4: Remove the AP board cover and cable cover
- Use an H2.0 Allen key to remove one fixing screw (BT2.6x8), then remove the AP board cover from the side near the front door.
- Hold the right side of the cable protector, unlock its snap-fit, and remove the protector.
¶ Step 5: Remove the XY motor (B)
- Pass the H2.0 Allen key through the small hole at the top of the left inner liner and remove 4 motor fixing screws (MK3x6).
- Use the H2.0 Allen key to remove 2 motor bearing bracket fixing screws (M3x6).
- Use tweezers to remove the silicone from the motor connector, disconnect the motor connector from the MC board, and pull the motor connector out of the cable channel.
- Pull the motor bearing bracket out of the printer frame, remove the belt from the driving wheel, then tilt the motor and remove it from the frame.
¶ Install the XY Motor (B)
¶ Step 1: Install the XY motor (B)
- Pass the motor connector through the cable channel in the inner liner, align the cable exit with the channel, tilt the motor through the frame hole, loop the belt onto the pulley of the XY motor (B), and insert the motor bearing bracket with its notch aligned to the frame pin.
- Use the H2.0 Allen key to tighten the 2 motor bearing bracket fixing screws (M3x6).
- Pass the H2.0 Allen key through the small hole in the inner liner, place the motor fixing screw on the H2.0 Allen key, guide it to the screw hole, and tighten it. Repeat this method to tighten all 4 motor fixing screws (MK3x6).
- Secure the motor cable into the cable clip and connect it to the MC board.
¶ Step 2: Install the 4pin interface board
Reinstall the 4pin interface board, use an H1.5 Allen key to tighten 2 fixing screws (BT2x5), and reconnect the cables.
¶ Step 3: Install the XY belt tensioner
- Insert the spring into the tensioner bracket shaft, then insert it vertically into the printer frame. Push the tensioner firmly to the left to snap it into place.
- After aligning the tensioner pressure plate with the screw holes, use an H2.0 Allen key to tighten the 2 pressure plate fixing screws (M3x6) and the 2 tensioner bracket fixing screws (M3x6).
¶ Step 4: Install the AC board cover, purge chute, and rear panel
You can refer to this Wiki to install:
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AC board cover
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Purge chute
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Rear panel
Replace H2D AC Board/AC board Cover
¶ Verify the Functionality
Connect the power and turn on the printer. Initiate a print and check for any error messages.
¶ End Notes
We hope the detailed guide provided has been helpful and informative.
If this guide does not solve your problem, please submit a technical ticket, we will answer your questions and provide assistance.
If you have any suggestions or feedback on this Wiki, please leave a message in the comment area. Thank you for your support and attention!