6. Electronics and MMU2S unit assembly

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MMU2S

Last updated a year ago

Difficulty

Difficult

Steps

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Step 1 Tools necessary for this chapter

⬢この章で準備するもの:

⬢M3 ネジ用の 2.5mm 六角レンチ

⬢ナットの調整用の 2mm 六角レンチ

⬢Needle-nose pliers for zip tie trimming

⬢Philips screw-driver for power cable assembly

⬢8mm wrench to tighten the QSM fittings

Older units may include a side wrench 8 mm.

Step 2 電装パーツの準備

⬢以下のステップに向けて、下記の部品を用意してください。

⬢mmu2-ele-cover (1x)

⬢M3x6 screw (3x)

⬢M3n nut (3x)

⬢MMU2 control board (1x)

Step 3 Electronics assembly

⬢Insert three M3n nuts in the ele-cover. Use a flat surface to push them in if necessary.

⬢Slide in the MMU2 control board. Make sure the three buttons are all the way through on the other side.

⬢Secure the board with three M3x6 screws. Tighten carefully.

Tip: If you can't press the nuts in, use a M3x6 screw to pull the nuts in before you slide in the board.

Step 4 ケーブルの準備

⬢以下のステップに向けて、下記の部品を用意してください。

⬢Power cable for the MK3 (1x)

⬢Power cable for the MK2.5 (1x)

Use the power cable depending on the type of your printer. In case the cable is missing in your kit, please contact our support.

⬢Signal cable (1x)

Note the signal cable has two different connectors! One is smooth without safety latch and the other one has a latch. Use the latch for the MMU2 board.

Step 5 Connecting the cables

⬢Prepare the MMU2 unit and the board assembly as in the picture. Follow the cables to connect them correctly.

⬢Signal cable (use side with safety latch)

⬢Power cable

⬢F.I.N.D.A. sensor cable

⬢Pulley motor cable

⬢Selector motor cable

⬢Idler motor cable

Step 6 ケーブルおまとめツールの準備

⬢以下のステップに向けて、下記の部品を用意してください。

⬢Textile sleeve (1x)

⬢Zip tie (4x)

⬢M3x18 screw (2x)

Step 7 ケーブルの整理 (パート 1)

⬢Prepare the MMU2 unit and the electronics assembly like in the picture. Position the side with two motors to the left and signal cable to the left as well.

⬢Place the electronics on the MMU2 unit. The connectors must be facing towards you.

⬢Secure the electronics assembly with two M3x18 screws.

Step 8 ケーブルの整理 (パート 2)

Make sure the selector with F.I.N.D.A. is all the way to the side as in the picture!

⬢We will start the cable management from the F.I.N.D.A. sensor and counter-clockwise. Note the arrows.

Tighten the cables firmly, but gently at the same time. You can damage (break) the wires.

⬢Carefully guide the cable from the F.I.N.D.A. sensor and couple it with the cable from the Selector motor. Use the first zip tie.

⬢Continue with the cable bundle and add the Pulley motor cable. Tighten these three cables using a second zip tie near the edge of the printed part (idler-body).

Step 9 ケーブルの整理 (パート 3)

⬢Take the signal and power cable (first two from the left). Bundle them together and wrap around 10 cm (3.94 inch) in the textile sleeve.

⬢Slide the sleeve towards the MMU2 unit as much as the cable allows.

⬢Take the bundle from the motors and F.I.N.D.A. add the textile sleeve above it and tighten it using the third zip tie.

⬢Finish wrapping the cables in the textile sleeve.

Step 10 ケーブルの整理 (パート 4)

⬢Now using the left hand take the cable from the Idler motor and pull it gently to the left.

⬢Using the right hand take the cable from F.I.N.D.A. sensor (black) and pull it gently to the right.

⬢Use the fourth zip tie and bundle all the cables together.

⬢Final cable management should be similar to the last picture.

Note: for the MK2.5 there will be different connectors at the end of the cable bundle.

Step 11 PTFEチューブの準備

⬢以下のステップに向けて、下記の部品を用意してください。

⬢mmu2-rear-PTFE-holder (1x)

⬢M3x18 screw (4x)

⬢M3n nut (4x)

⬢PTFEチューブ 4x2x650 (5本)

PTFEチューブは、損傷を避けるために、取り付けの最後のアイテムとしてあります。組み立ての際はご注意ください ;)

Step 12 PTFEチューブの組み付け(パート1)

⬢Carefully turn the entire MMU2 unit upside-down.

⬢Slide in the M3n nuts. Use a M3x18 screw to press them in. Use your hand, hammer shouldn't be necessary.

⬢The hole for each nut is slightly narrower on the other end, therefore the nut should have a snug fit.

Step 13 PTFEチューブの組み付け(パート2)

⬢最初のPTFEチューブを手に取り、MMU2Sユニット内にスライドさせます。5本のチューブは全て一方向に曲がっていますが、自由端が上向きになっていることを確認してください。

⬢各PTFEチューブのために円形の穴があり、穴の中に少なくとも0.5～1 mm (0.02～0.04 inch)のチューブを押し込むことができるはずです。

⬢続けて、残りの4本のPTFEチューブを押し込んでいきます。

Step 14 PTFEチューブの組み付け(パート3)

⬢リアPTFEホルダーをPTFEチューブの上部に配置します。プリントパーツの側面が厚い側が、外側を向いている必要があるりますのでご注意ください。

⬢Secure the rear-PTFE holder using four M3x18 screws. Tighten the screws fully only after you ensure proper alignment of the printed part! Otherwise, you risk squishing the tubes and future filament jams.

Step 15 フレームホルダーの準備

⬢以下のステップに向けて、下記の部品を用意してください。

⬢mmu2-frame-holder (2x)

⬢M3x12 screw (4x)

Be extra careful with the holders from now on. If you break them, you won't be able to mount the MMU2 unit on the frame.

Step 16 Frame holder assembly

While the MMU2 unit is turned upside down, be EXTRA careful with the F.I.N.D.A. cable, which can get broken, if you tilt the unit on the F.I.N.D.A. sensor.

⬢Turn the MMU2 unit upside down like in the first picture. Locate the four holes for the M3 screws. Make sure there are nuts in them.

⬢両方のフレームホルダーパーツをMMU2S本体にセットします。傾斜の長い方がPTFEチューブの方向となります。

⬢Ensure once again the correct orientation of the frame holders.

⬢Secure the holders using four M3x12 screws.

Step 17 MMU2S unit is finished!

⬢Great job, the MMU2 unit is finished!

⬢Compare the picture to your assembly.

DO NOT ASSEMBLE the MMU2 unit on the FRAME!!! Wait for the instructions.

Step 18 PTFEチューブの準備

⬢以下のステップに向けて、下記の部品を用意してください。

⬢PTFEチューブ 4x2x360 (1本)

⬢Fitting QSM-M5 (2x)

Note this tube, can be also white. The dimensions and properties are the same.

Step 19 PTFEチューブの組み付け

⬢QSM-M5フィッティングを1つ取り、PTFEチューブを中に滑り込ませます。チューブがカチッとはまる感触があるはずです。

⬢Repeat this procedure on the other end.

As an alternative, you can first screw the fittings in the printer and then slide the tube in.

Step 20 MMU2Sユニットの組立て（パート1）

⬢以下のステップに向けて、下記の部品を用意してください。

⬢Original Prusa i3 MK3S/MK2.5S printer

⬢MMU2S unit

⬢PTFEチューブ

⬢8mm wrench

Before you plug in the MMU2S unit to the printer, please make sure the printer is TURNED OFF!

Step 21 MMU2Sユニットの組立て（パート2）

The MMU2S unit should be placed in the middle on the top part of the aluminium frame (next to the Prusa logo).

⬢Place the unit on the frame, do not try to fix it for now.

⬢Look from behind the printer, there are "clamps" on the MMU2S unit, which must be snapped (locked) to the frame. Don't do it now, wait for the next step!

Step 22 MMU2Sユニットの組立て（パート3）

⬢Make sure once more the unit is in the middle of the frame, once we engage the clamps, you won't be able to move it!

⬢Using both hands, apply equal pressure along the top part of the MMU2S unit. Press downwards and slightly towards the frame. Press until the clamps lock to the frame.

⬢Check on the front side of the frame, both clamps of the holder are fully engaged.

That's it for the MMU2S unit ;)

Step 23 エクストルーダーとMMU2Sユニットの接続

⬢先ほど用意したPTFEチューブを取り出し、エクストルーダーに接続します。チューブの両端は同じものです。指でネジを締めます。

⬢Take the second end of the tube and connect it to the MMU2S unit. Tighten the fitting using fingers.

⬢Check both fittings on the tube are perpendicular to the surface of the extruder and the MMU2S unit. Make sure the tube is not distorted or twisted.

⬢Tighten both fittings using the 8mm side of the wrench, be very careful when tightening, don't use an excessive force!

Step 24 Connecting the electronics

WARNING: we need to cut part of the plastic. Make sure you wear protective eyewear!

⬢上部ヒンジのM3x10ネジを緩めて取り外します。次に、ヒンジとドアを取り外します。

⬢Using pliers carefully cut the corner of the door. We need to create a space for the MMU2S unit cable bundle.

⬢Comparison between the trimmed door (left) and the original shape (right).

Step 25 Connecting the electronics

⬢Place the door back.

⬢Insert back the hinge.

⬢Tighten the M3x10 screw.

⬢Insert the cable bundle from the MMU2S unit.

⬢Place back the clip and tighten it.

⬢Attach the extruder cable bundle to the hooks on the inside of the Einsy-base by using two zip-ties.

⬢Now, let's connect the cables to the board. Select the next steps based on the printer that you have.

Step 26 エクストルーダーの接続 MK3S/+ (オプション)

Connections differ depending on the printer you have. For the MK3S/+, please use this step. For the MK2.5S please skip to the following one.

⬢Follow the diagram in case you need to reconnect the extruder cables into the Einsy Rambo board.

⬢In case you upgraded from the MK3 printer, you have to reconnect the entire extruder cable bundle.

Step 27 Connecting the electronics MK3S/+

Connecting MMU2S unit to the printer differs depending on the printer you have. For the MK3S, please use this step. For the MK2.5S please skip to the next.

⬢Signal cable (upper row of the pins, brown wire in the connector facing left)

⬢IR-sensor cable (white wire facing to the left)

Make sure the signal cable is connected to all pins!

⬢Power cable (add it to the first two clamps from the left, leave the PSU cables connected). Red wire is positive and in the first slot, black wire is negative and in the second.

⬢The power cable connector "fork" has bended ends, make sure they point up, see the picture.

Make sure the power cables are tightened firmly!

Use the Philips screw-driver to release the screws on the EINSY.