10. Quick release PSU cable - MK4/3.9 Black PSU (add-on)

Relevant for:

Enclosure

Last updated 3 months ago

Difficulty

Moderate

Steps

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Step 1 Introduction

⬢This guide will take you through the installation of the Quick release PSU cable on the Original Prusa Enclosure.

This addon is compatible with Original Prusa MK4 and MK3.9.

This add-on is not compatible with the silver PSU.

Buy a compatible black PSU from our E-shop.

Step 2 Tools necessary for this chapter

Tools are not included in the add-on package.

⬢For this chapter, please prepare:

⬢2.5 mm Allen key

⬢Needle-nose or cutting pliers

⬢Phillips screwdriver PH2

⬢Dust cloth (for heatbed cover)

Step 3 Removing the xLCD

⬢Carefully cut the zip tie securing the xLCD cable bundle.

⬢Release two screws mounting the xLCD assembly.

Be gentle, the xLCD is still connected.

Step 4 Removing the xLCD cables

⬢xLCD PE cables are in two versions, unplug the PE cable:

⬢Version A: unplug the PE cable from the upper PE Faston.

⬢Version B: unplug the PE cable from the lower PE Faston.

⬢For both versions - gently unplug the xLCD cable.

⬢Take off the xLCD assembly and put it aside. We'll use it later.

⬢Push the xLCD cable bundle through the hole in the bottom panel into the enclosure.

Step 5 Removing the PTFE tube

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

⬢Press down the blue collet on the Fitting QSM-M5.

⬢Pull out the PTFE tube from the fitting.

Step 6 Removing the printer

⬢Open the door of the enclosure.

⬢Place the printer at an angle (as shown in the picture) in the enclosure behind the anti-slip dampers.

⬢"Unlock" all PSU-locks and grasp the PSU assembly by its handle and remove it from the back panel.

⬢Place the PSU on the heatbed protected with the cloth. Turn it with the PSU-handle facing upwards.

Step 7 Removing the printer

⬢Carefully remove the printer from the enclosure.

Avoid scratching the printer and enclosure.

⬢Place the enclosure aside. We will need it later on.

Step 8 Disconnecting the PSU

⬢On the PSU holder, cut off the zip tie securing the PSU cable.

⬢On the other side of the PSU assembly, loosen two screws mounting the PSU-cover and remove the cover from the PSU.

⬢Using a Phillips screwdriver, loosen all the screws on the PSU cables. No need to remove the screws.

⬢Remove all PSU cables from the terminals.

⬢Using a Phillips screwdriver, unscrew the screw holding the PE cable.

⬢Disconnect the power panic cable from the PSU.

⬢Place the disconnected PSU aside for now. We'll come back to that later.

Step 9 xLCD cable bunde sleeve

⬢Cut off the zip-tie holding the xLCD cable bundle.

⬢Take off the 450 mm sleeve from the xLCD cable bundle. Put the sleeve nearby, we´ll use it later.

Step 10 xBuddy box cover

⬢Cut off the zip tie merging the power cables.

⬢From the front of the xBuddy box, loosen four M3x6 screws to release the xBuddy cover using a 2,5 mm Allen key. Take off the cover.

⬢Using a 2,5 mm Allen key, loosen two M3x10 screws holding el-box-cover. Take off the cover.

Step 11 Disconnecting the PSU cables

⬢Using the Phillips screwdriver, loosen the screws securing the PSU cables. And remove all the cables from the terminals. Keep the screws for later!

⬢Disconnect the Power panic cable from the electronics board.

⬢Using a 2,5 mm Allen key, unscrew the M3x6 screw and remove the PE cable with a washer. Keep the washer and the screw for later!

⬢Cut the zip ties on both ends of the textile sleeve and remove the sleeve from the cable bundle. Keep the sleeve for later!

You will no longer need this cable bundle. However, we recommend not discarding it. Keep it as a spare.

⬢Keep the electronics box open.

Step 12 Installing the quick release cable: parts preparation

⬢For the following steps, please prepare:

⬢Quick Release cable - Printer Side (1x)

⬢Quick Release cable - Black PSU Side (1x)

Step 13 Quick release cable: power panic

⬢Take the Quick release cable - Printer side.

MK4 printers can have two versions of the Power panic cable (you disconnected it from the PSU). The type of Power panic cable impacts how to prepare the Quick release cable.

⬢Check what versions of the Power panic cable you have and follow the appropriate instructions:

⬢Single cable (black): the connecting plugs must remain disconnected.

⬢Dual-(black and white): connect both plugs.

⬢Keep the Quick release cable aside. We will need it later on.

Step 14 Installing the quick release cable

⬢Remove the plug from the PSU holder.

⬢Insert the Quick Release cable - Black PSU Side into the hole in the PSU holder.

⬢From the opposite side of the PSU holder check that the latches on the connector are engaged with the metal sheet.

Step 15 Connecting the PSU cables

⬢Loosen the screw on the PSU, and then attach the PE cable from the Quick release cable to the screw.

⬢Connect all PSU power cables. Use this method for all PSU cables and connect them in the following order:

⬢POSITIVE (red) wire

⬢NEGATIVE (black) wire

Check the connection again! The red wire is in the first slot and black in the third. Make sure that cables are properly tightened. Otherwise, there is a risk of damage to the printer!

⬢Connect the power panic cable to the PSU.

Step 16 Covering the PSU: parts preparation

⬢For the following steps, please prepare:

⬢PSU-cover (1x) you removed earlier

⬢M3x10 screw (2x) you removed earlier

Step 17 Covering the PSU

⬢Slide the cover on the cables from the top. Make sure the "PRUSA" logo is facing up.

⬢Secure the cover using two M3x10 screws. Note that the holes are quite deep.

Step 18 Connecting the PSU cables: parts preparation

⬢For the following steps, please prepare:

⬢M3x6 screw (1x)

⬢M3w washer (1x)

Step 19 Connecting the PSU cables

⬢Using a 2,5 mm Allen key, secure the PE cable with the M3x6 screw with a washer.

Note the correct orientation of the PE connector.

⬢Connect the Quick Release cable - Printer Side to the xBuddy board in the following order (from the left):

⬢POSITIVE (red) wire

⬢NEGATIVE (black, black) wire

⬢POSITIVE (red) wire

⬢NEGATIVE (black, black) wire

⬢Connect the power panic cable to the xBuddy board.

⬢Cut off the zip-tie holding the xLCD cable.

Check the cable connection according to the last picture.

Step 20 Covering the xBuddy box: parts preparation

⬢For the following steps, please prepare:

⬢xBuddybox-cover (1x)

⬢M3x6 screw (4x)

⬢El-box-cover (1x)

⬢M3x10 screw (2x)

Step 21 Covering the xBuddy box: bottom cover

Be careful, don't pinch any cable!

⬢Push two M3x10 screws through the el-box-cover.

⬢Put the power panic connector on the right side of the xBuddy box.

⬢Gently insert the el-box-cover in its position as described.

Step 22 Covering the xBuddy box: bottom cover tightening

⬢Using a 2,5 mm Allen key, tighten two M3x10 screws.

Step 23 xBuddy box cover

Be careful not to pinch cables!

⬢Close the xBuddy box.

⬢Insert four M3x6 screws and tighten them using a 2,5 mm Allen key.

Step 24 Covering the quick release cable: parts preparation

⬢For the following steps, please prepare:

⬢Textile sleeve 8 x 350 mm (1x) you removed earlier

⬢Zip tie (2x)

Step 25 Covering the quick release cable

⬢From the electronics, wrap the quick-release cable (including the black power panic cable) in the textile sleeve.

Do not over-tighten the zip tie! It can damage the cables.

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

⬢Secure the second end with the zip-tie.

Step 26 Covering the xLCD cables: parts preparation

⬢For the following steps, please prepare:

⬢Textile sleeve 13 x 400 mm (1x)

⬢Zip tie (1x)

Step 27 Covering the xLCD cable bundle

⬢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 28 Installing the PSU

⬢Now, prepare the enclosure on the work surface.

⬢Ensure the PSU-locks are still turned at the same position:

⬢On the bottom frame, turn the PSU-locks to the horizontal position.

⬢On the support, turn the PSU-lock to the vertical position.

⬢Push the PSU through the opening in the back panel.

⬢Attach the PSU-holder on the all PSU-locks.

⬢Turn all PSU-lock 90° to lock the PSU assembly.

Step 29 Installing the printer

⬢To get the printer into the enclosure, insert its left side first.

Avoid scratching the side panels with the printer!

⬢Place the printer at an angle (as shown in the picture) in the enclosure behind the anti-slip dampers.

It's just a temporary position for the printer. We will adjust the correct position later.

Step 30 Connecting the quick release cable

⬢Grasp the quick release guiding from the printer, with the power panic cable on the left.

⬢Plug the connector to the quick release cable in the PSU holder.

The quick-release connector can be plugged in only in one orientation.

⬢Rearrange position of the printer like in the picture. Place it in the center of the enclosure and adjust the correct position.

Step 31 Mounting the xLCD: parts preparation

⬢For the following steps, please prepare:

⬢xLCD assembly (1x)

⬢M3x8 thumb screw (2x)

⬢Zip tie (2x)

Step 32 Version A: Mounting the xLCD

⬢Guide the xLCD cable through the cutout in the bottom panel.

⬢Secure the textile sleeve on the cable bundle with the zip tie. Do not over tighten the zip tie, it may cut the cables!

⬢Place the xLCD assembly close to the xLCD cables, like in the picture. Mind the same orientation of the xLCD as in the picture. See the xLCD-supports for better understanding.

⬢Connect the xLCD cable to the xLCD board. Note the safety latch on the xLCD cable connector. It must be plugged into the side of the xLCD slot marked with the orange triangle on the board.

⬢Take the end of the PE cable with square connector. Slide the connector onto the PE Faston all the way down.

⬢From the inside, push two M3x8 screws through the bottom profile.

⬢Slide the xLCD assembly onto the two M3x8 screws in the frame and tighten them.

Step 33 Version B: Mounting the xLCD

⬢Guide the xLCD cable through the cutout in the bottom panel.

⬢Secure the textile sleeve on the cable bundle with the zip tie. Do not over tighten the zip tie, it may cut the cables!

⬢Place the xLCD assembly close to the xLCD cables, like in the picture. Mind the same orientation of the xLCD as in the picture. See the xLCD-supports for better understanding.

⬢Connect the xLCD cable to the xLCD board. Note the safety latch on the xLCD cable connector. It must be plugged into the side of the xLCD slot marked with the orange triangle on the board.

⬢Take the end of the PE cable with square connector. Slide the connector onto the PE Faston all the way down.

10. Quick release PSU cable - MK4/3.9 Black PSU (add-on)

10. Quick release PSU cable - MK4/3.9 Black PSU (add-on)

Step 1 Introduction

Step 2 Tools necessary for this chapter

Step 3 Removing the xLCD

Step 4 Removing the xLCD cables

Step 5 Removing the PTFE tube

Step 6 Removing the printer

Step 7 Removing the printer

Step 8 Disconnecting the PSU

Step 9 xLCD cable bunde sleeve

Step 10 xBuddy box cover

Step 11 Disconnecting the PSU cables

Step 12 Installing the quick release cable: parts preparation

Step 13 Quick release cable: power panic

Step 14 Installing the quick release cable

Step 15 Connecting the PSU cables

Step 16 Covering the PSU: parts preparation

Step 17 Covering the PSU

Step 18 Connecting the PSU cables: parts preparation

Step 19 Connecting the PSU cables

Step 20 Covering the xBuddy box: parts preparation

Step 21 Covering the xBuddy box: bottom cover

Step 22 Covering the xBuddy box: bottom cover tightening

Step 23 xBuddy box cover

Step 24 Covering the quick release cable: parts preparation

Step 25 Covering the quick release cable

Step 26 Covering the xLCD cables: parts preparation

Step 27 Covering the xLCD cable bundle

Step 28 Installing the PSU

Step 29 Installing the printer

Step 30 Connecting the quick release cable

Step 31 Mounting the xLCD: parts preparation

Step 32 Version A: Mounting the xLCD

Step 33 Version B: Mounting the xLCD

Step 34 Mounting the xLCD

Step 35 Securing the xLCD cable

Step 36 Connecting the PTFE tube

Step 37 Well done!

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