2A. Preparing the printer (MK4/S & 3.9/S)

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Last updated a month ago

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Steps

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Step 1 Tools necessary for this chapter

⬢For the following steps, please prepare:

⬢2.5mm Allen key

⬢T10 Torx key

⬢Needle-nose pliers for cutting zip ties

⬢Piece of cloth or fabric (at least 15x15 cm) for covering the heatbed

Step 2 Preparing the printer

Before we start with partial disassembling of the printer, proceed with the following steps:

⬢Unload the filament from the extruder.

⬢Turn the printer off and unplug the power cable.

⬢Remove the steel sheet from the heatbed.

⬢Remove the USB flash disk.

⬢Take off the filament spool from the spool holder and remove the spool holder from the printer.

Step 3 Disconnecting the xLCD cables

⬢Carefully turn the printer on its side (on the PSU).

⬢Disconnect the PE cable.

⬢Disconnect the xLCD cable.

You may have another version of the connected PE cable. Disconnect the PE and continue as instructed.

Step 4 Removing the xLCD cable clips

⬢Pry out the cable clips using a 2,5mm Allen key.

⬢Pry out and release all cable clips.

⬢Carefully remove the xLCD cables and the PE cable from the cable clips.

Step 5 Removing the xLCD cables

⬢Using the needle-nose pliers, cut the zip tie near the PSU. Be careful not to cut the cables!

⬢Follow the cable bundle up. Cut two zip ties securing the cable bundle over the xLCD cables.

⬢Cut remaining zip ties on the cable bundle. Their number may vary at this location.

Step 6 Removing the xLCD cables

⬢Remove the xLCD cable and PE cable from the cable bundle.

⬢Put the printer back on its feet and leave the xLCD cable and PE cable free next to the printer.

Avoid placing the printer on xLCD and PE cables!

Step 7 Removing the xLCD

⬢Move the heatbed away from the xLCD.

⬢Release all four screws holding the xLCD in the front plate. Remove the xLCD from the printer.

Put the xLCD in a safe place for now. You'll need it again soon.

Step 8 Releasing the PSU

⬢Release two screws holding the PSU-cover and remove the cover from the PSU.

⬢Loosen two screws holding the PSU on the aluminum extrusion. Do not remove them completely! Keep them in place.

⬢Release two round head screws from the front side of the frame securing the PSU. Do not throw them away!

If one of the screws is hidden behind the X-end, manually rotate both threaded rods at the same time to move the X-axis up or down.

Step 9 Removing the PSU

⬢Slightly lift the PSU until it can be completely released from the printer.

⬢Remove the PSU from the printer and place it behind the back of the printer on the piece of cloth, like in the picture.

You will need to slightly lift the printer to guide the cables out of the frame.

⬢Carefully turn the printer on the "electronics" side.

Avoid putting the printer on the LCD cables!

Step 10 Guiding the cables: parts preparation

⬢For the following steps, please prepare:

⬢Zip tie (3x)

Step 11 Guiding the cables

In the upcoming steps, please tighten all zip ties carefully, as you might pinch/break the cables.

⬢Locate the circular holes in the frame near the Z-axis right motor.

⬢Slide the zip tie through the circular holes in the frame to create a loop.

⬢Guide the motor cable in the zip tie and tighten it. Be careful not to over tighten the tie as it can cut the wires. Cut the remaining part.

Step 12 Guiding the cables

⬢Continue downwards and using another zip tie create the next loop.

⬢Insert Y-axis motor cable to the current bundle.

⬢Push the cable gently in the zip tie and tighten it so it is snug and holding the wires. Be careful not to over tighten the tie as it can cut the wires . Cut the remaining part.

⬢Following the cables and secure the bundle with the zip tie in the next couple of holes.

Step 13 Mounting the printer frame support: part preparation

⬢For the following steps, please prepare:

⬢Printer frame support (1x)

⬢M4x10r screw (2x) previously removed from the PSU

Step 14 Mounting the printer frame support

⬢Slide the printer frame support on the screws in the aluminum extrusions (instead of the PSU).

⬢Move the printer frame support to the frame.

⬢Secure the printer frame support to the frame with two M4x10r screws.

Step 15 Mounting the printer frame support

⬢Fully tighten the screws on the printer frame support.

Step 16 Covering the PSU cables: parts preparation

⬢For the following steps, please prepare:

There are two textile sleeves in your kit with different lengths and diameters.

⬢Textile sleeve 8 x 350 mm (1x)

⬢Zip tie (2x)

Step 17 Covering the PSU cables

⬢From the electronics, wrap the PSU cable (including the black&white power panic cable and the green&yellow PE cable) in the textile sleeve.

⬢Leave 2-5 cm from the electronics uncovered. Secure the end of the sleeve with the zip tie.

⬢Wrap the entire length of the bundle and slightly twist the sleeve, not the cables.

⬢Secure the end of the sleeve with the zip tie.

Step 18 Covering the xLCD cables: parts preparation

⬢For the following steps, please prepare:

⬢Textile sleeve 13 x 400 mm (1x)

⬢Zip tie (1x)

Step 19 Covering the xLCD cables

⬢From the electronics, wrap the xLCD and PE cables in the textile sleeve.

⬢Push the textile sleeve near to the electronics box.

⬢Wrap the entire length of the xLCD cable bundle.

⬢Using the zip tie, create a loop through the circle holes in the frame around the motor cables and xLCD cable bundle.

Do not forget to include the Z-axis left motor cable on the front side of the frame! See the detail.

Step 20 QSM fitting: parts preparation

⬢For the following steps, please prepare:

⬢Fitting QSM-M5 (1x)

Starting from September 2024, you may receive a new black Fitting M5-4. The assembly and functionality remain identical to the blue one.

Step 21 Installing the QSM fitting

⬢Insert and screw the Fitting QSM-M5 directly into the threaded filament hole in the extruder.

Step 22 MK4S xLCD: parts preparation

Your MK4S or MK3.9S may have a printed or injection molded xLCD cover. The following steps are for the injection molded version. If you have the printed cover, go toVersion A: Disassembling the xLCD

⬢For the next steps, please prepare:

⬢xLCD assembly (1x)

⬢xLCD-adapter_L (1x)

⬢xLCD-adapter_R (1x)

⬢3x12sT screw (4x) removed in previous steps

⬢M3nS nut (2x)

Step 23 MK4S xLCD adapters preparation

⬢Insert one M3nS nut into xLCD-adapter_R.

⬢Insert one M3nS nut into xLCD-adapter_L.

⬢Insert four 3x12sT screws into the adapters and tighten them with a few turns.

Step 24 MK4S adapters securing

⬢Attach the xLCD-adapter_R and secure two 3x12sT screw using a T10 Torx key.

⬢Attach the xLCD-adapter_L and secure two 3x12sT screws using a T10 Torx key.

⬢Good job, the MK4S xLCD assembly is prepared.

Step 25 Version A: Disassembling the xLCD

⬢Remove the xLCD-knob and keep it for later use.

⬢Release four M3x8 screws securing the xLCD board.

⬢Take off the xLCD-support-left.

⬢Take off the PE Faston 6.3x0.8 and keep it for later.

Step 26 Version B: Disassembling the xLCD

⬢Remove the xLCD-knob and keep it for later use.

⬢Release five M3x8rT screws securing the xLCD board.

⬢Take off the xLCD-support-left.

⬢Take off the PE Faston 6.3x0.8 and keep it for later.

⬢xLCD-cover (1x) old part

⬢xLCD screen (1x) old part

⬢xLCD-knob (1x) old part

⬢xLCD-support-L-MK4 (1x)

⬢xLCD-support-R-MK4 (1x)

The list continues in the next step...

Step 30 Version A: Preparing the xLCD: parts preparation

⬢M3nS nut (2x)

⬢M3x8 screw (4x) previously removed

⬢PE Faston 6.3x0.8 (1x) old part

Step 31 Version B: Preparing the xLCD: parts preparation

⬢M3nS nut (2x)

⬢M3x8rT screw (5x) previously removed

⬢PE Faston 6.3x0.8 (1x) old part

Step 32 Preparing the xLCD

⬢Insert all the way of the M3nS nut into each xLCD-support.

You may use a 2.5 mm Allen key to push the nuts into the xLCD supports.

During handling, be careful that the nuts do not fall out of the parts.

Step 33 Version A: Preparing the xLCD

⬢Insert the xLCD-support-right on an xLCD.

⬢Notice there is a small hook that goes around the circuit board.

⬢Insert the xLCD screen with the support all the way in the xLCD-cover.

⬢Attach the xLCD-support-left on the xLCD board and align it with two holes in the board.

⬢Secure the xLCD support with three M3x8 screws.

Step 34 Version B: Preparing the xLCD

⬢Insert the xLCD-support-right on an xLCD.

⬢Notice there is a small hook that goes around the circuit board.

⬢Insert the xLCD screen with the support all the way in the xLCD-cover.

⬢Attach the xLCD-support-left on the xLCD board and align it with three holes in the board.

⬢Secure the xLCD support with three M3x8rT screws.

Step 35 Version A: Installing the PE Faston

⬢Locate the PE hole on the xLCD next to the xLCD-support-right.

⬢Insert the M3x8 and PE faston and secure it with a 2.5mm Allen key.

Step 36 Version B: Installing the PE Faston

⬢Insert the M3x8rT screw into the PE hole and secure it.

⬢Insert the PE Faston between the xLCD-support-left and the xLCD board. Align it with the hole and point the PE Faston slightly diagonally as you see in the picture.

⬢Secure all parts together with one M3x8rT screw.