In this guide we will explain how to replace the Y belt for the M3D PRO. You will need a 2.0mm hex screwdriver for the disassembly and you’ll want to be in a antistatic environment. Some electronics will be exposed during the disassembly and there is a chance you could damage them. We recommend not working on a carpeted area and to discharge before working. You can do this by touching something metal (Not the printer) for at least one second. Wearing an antistatic wrist-wrap would be good. Link for a wrist-wrap here https://www.amazon.com/Rosewill-Anti-Static-Components-RTK-002-Yellow/dp/B004N8ZQKY/ref=sr_1_1?ie=UTF8&qid=1494531998&sr=8-1-spons&keywords=anti+static+wrist+strap&psc=1 Although, it is highly recommended to use an antistatic wrist-wrap, if you do not have access to the antistatic wrist-wrap, you can do the repair process by having a metal contact to your body throughout the repair.
1. Remove the print bed as shown in the picture below:
2. Remove the four 2mm hex drive screws that holds the top of the base (fluff).
3. Pull the top of the base (fluff) up.
4. This is how the top of the base (fluff) should be raised.
5. Next, remove the 2mm hex drive screws that secure the front and rear cube plastic parts.
6. This is how the printer should look like after removing the cube front.
7. Now, remove the rear cube part as shown in the picture below.
8. If the print head is too low, twist the threaded rods in order to raise it up further.
9.Remove the two columns (left an right) as well as the gantries. Now in order to put a new Y belt, you would need to remove the old encoder wheels as they are glued onto the pulley. Refer to the following picture on how to remove the encoders on both the sides.
10.Once the encoders are removed, you would need to remove the two front Z rods (threaded rods). Refer to the following picture:
11.Once the encoders and threaded rods have been removed, twist the belt as shown in the picture below and slide it across the two Y pulleys as shown in the picture below:
12.When putting the belt across the pulley, slide the belt on the pulley and rotate it such that the belts sits on the pulley as shown in the picture below:
13. The picture below shows how the belt shoul be placed across the pulley:
14.When putting the Y belt on, the lower portion of the belt should be placed under the LED logo holder as shown in the picture below:
15.The upper portion of the belt should on the top of the LED logo holder as shown in the picture below:
16. Once the Y belt I placed, insert the two Z rods back on, as shown in the picture below:
Note: Make sure to insert the Z rods first before. putting the two encoder wheels that you receive in the package as if the encoders are placed first, then they will get damaged when you try to put the Z rod back on later.
17.After putting the Z rods on, slide the encoders on both the Y square rods all the way down into the pulley. Place a drop of super glue on the pulley to make sure the encoder sticks to pulley and is not loose. Refer to the following pictures:
18.Place the fluff (upper base on the printer and bring the gantries to the top to align them. The front left and right corners should be 2 mm lower than the rears.
19. Now, install the column left and right as shown in the picture:
20. Similarly, install the cube rear and cube front as shown in the pictures below.
21. Make sure the rear wire is adjusted as shown in the picture below:
22.Now, press down the top of the base (fluff), making sure not to pinch any wires. The internal tube grommet should slide into the slot of the fluff as the fluff is lowered.
23.Finally, install the four 2mm hex drive screw to secure the fluff and then install the print bed to finish the assembly.