EN
  • Čeština
  • Español
  • Italiano
  • Deutsch
  • Polski
  • Français
  • 日本語
Login
Menu

5. xLCD & PSU assembly

5. xLCD & PSU assembly
Relevant for:
Last updated 3 months ago
5. xLCD & PSU assembly
 Difficulty
Moderate
 Steps
49
 Available languages
CSPLDEESITFRJA
Tools necessary for this chapter
Tools necessary for this chapter
Tools necessary for this chapter
For the following steps, please prepare:
2.5mm Allen key
3.0mm Allen key for silver PSU version
Needle-nose pliers for tightening and cutting zip ties
Torx key T8/10
Phillips screwdriver
Installing the cable clips
Installing the cable clips
Installing the cable clips
Installing the cable clips
Turn the frame like in the picture and focus on the marked area.
Take one of the cable clips and hook the side with the clip into the inner groove of the lower longer extrusion. There is a hook on the part, see the detail.
Place the other end of the clip on the underside of the extrusion.
Use more force to push on the bottom side of the cable clip. It must fit into the groove and you must feel it "click" in.
Installing the cable clips
Installing the cable clips
Installing the cable clips
Install three clips to the long extrusion.
Install one clip to the short extrusion.
Turn the frame, install two clips to the second short extrusion.
Place the printer back on its feet.
xLCD assembly: parts preparation
xLCD assembly: parts preparation
For the following steps, please prepare:
xLCD (1x)
Remove the protective film from the xLCD screen.
xLCD-cover (1x)
xLCD-support-left (1x)
xLCD-support-right (1x)
xReflector sticker set (1x)
The list continues in the next step...
xLCD assembly: parts preparation (part 2)
xLCD assembly: parts preparation (part 2)
M3x8 screw (4x)
M3nS nut (4x)
PE Faston 6.3x0.8 (1x)
In some following steps, you may notice photos of the xLCD-cover with imprinted graphics (MK4 logo, reset button). This is because we have used the identical steps and photos from the MK4 assembly instructions.
Installing the xReflector sticker
Installing the xReflector sticker
Installing the xReflector sticker
Installing the xReflector sticker
Peel off one of the individual adhesive xReflector sticker.
If the sticker is damaged during peeling, there is an extra sticker in the SPARE package.
Position the xReflector sticker strip so that it lines up with one side and both the edges of the "gutter" in the xLCD-cover. Continue to lay down the xReflector sticker strip towards the other side of the gutter.
Press the xReflector sticker strip all the way into the gutter so it adheres to the xlcd-cover.
Assembling the xLCD-support-right
Assembling the xLCD-support-right
Assembling the xLCD-support-right
Assembling the xLCD-support-right
Place the xLCD-support-right onto the USB-connector-side of the xLCD board. Notice there is a small hook that goes around the circuit board.
Line up the hole in the plastic part with the hole in the xLCD board.
Ensure that the protective film is removed from the display.
Insert the xLCD with the xLCD-support-right still hooked on, into the xLCD-cover. Note the recess for the xLCD-support-right in the xLCD-cover. The support must perfectly fit into the recess.
Make sure the hook on the xLCD-support-right holds onto the xLCD now. Otherwise, you won't be able to attach it later.
Installing the PE Faston
Installing the PE Faston
Installing the PE Faston
Installing the PE Faston
Secure the xLCD-support-right and the xLCD board with the M3x8 screw.
Attach the PE Faston on the top left hole in the xLCD.
Orient PE Faston according to the picture. The bent part must point to the right - to the triangle symbol.
Maintain the position and secure the PE Faston with the M3x8 screw.
Assembling the xLCD-support-left
Assembling the xLCD-support-left
Assembling the xLCD-support-left
Attach the xLCD-support-left on the xLCD board and align it with two holes in the board.
Secure both parts together with two M3x8 screws.
xLCD cables: parts preparation
xLCD cables: parts preparation
xLCD cables: parts preparation
For the following steps, please prepare:
PE cable 460/420 mm (1x)
xLCD cable (1x)
xLCD-knob(1x)
M3x10 screw (4x)
M3x6 screw (1x)
M3w washer (1x)
Connecting the PE cable: xLCD
Connecting the PE cable: xLCD
Connecting the PE cable: xLCD
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 triangle symbol on the board.
Make sure the xLCD cable is connected in the same orientation as seen in the picture. Otherwise, your display won't work
Take the end of the PE cable with square connector. Slide the connector onto the PE Faston all the way down.
Attaching the knob
Attaching the knob
Attaching the knob
Attach and push the xLCD-knob onto the xLCD encoder pin.
Note that there is a flat part on the encoder shaft. There is a geometry on the inside of the knob that should align with the flat part to seat the knob properly.
Attaching the xLCD assembly
Attaching the xLCD assembly
Attaching the xLCD assembly
Attaching the xLCD assembly
There are four holes in the front plate of the printer's frame. Insert four M3x10 screws through each of them from the inner side.

Attach the xLCD assembly onto the front plate. The screws should fit into the corresponding openings in the xLCD assembly.

Guide the xLCD and PE cables under the front plate to the frame.
Tighten up all four screws.
Guiding the xLCD cable
Guiding the xLCD cable
Guide all cables through the cable clips on the inside of the frame.
Leave the end of the cable free for now.
Connecting the PE cable: xBuddy
Connecting the PE cable: xBuddy
Attach the PE cable connector (split end) to the right lower screw hole in the xBuddy box. Secure the cable with the M3w washer and the M3x6 screw. Tighten the screw firmly.
Note the correct orientation of the PE connector.
Guide the PE cable so that it does not interfere with the threaded hole under the xBuddy board.
PSU cables (black PSU): parts preparation
PSU cables (black PSU): parts preparation
PSU cables (black PSU): parts preparation
PSU cables (black PSU): parts preparation
The following steps are intended for the black PSU only.
For the following steps, please prepare:
PSU-cover (1x) you can retain the old one
M3x10 screw (2x)
xBuddy power cable (2x)
Power panic cable (1x)
Zip tie (3x)
Connecting the PSU (Black PSU): PE cable
Connecting the PSU (Black PSU): PE cable
Connecting the PSU (Black PSU): PE cable
Connecting the PSU (Black PSU): PE cable
Place the printer so that you have easy access to the bottom side of the PSU.
Remove the left screw on the PSU circuit board. Note there is a washer on the screw.  Do not throw the screw away, you will need it later.
Place the single end of the PE (not the forked end) cable into the same place you have removed the screw. Secure the cable by re-using the screw together with the washer.
Note the correct orientation of the PE cable connector.
Guide the PE cable so that it does not interfere with the threaded column under the PE connector.
Power cables info (Black PSU)
Power cables info (Black PSU)
Power cables info (Black PSU)
In the following steps, we will be connecting the power cables one by one. The terminal screws are installed on the PSU already. Loosen them but don't remove them completely so they don't get mixed up with the other type of screws used on the xBuddy board side of the cable. Each of the two power cables has two leads.
One has a prevailing red color = positive / + 
One has a prevailing black color = negative / -
Note that the power cables have different connectors on each end. For now, prepare the U-shaped connectors (crimping tube color may vary).
Note that the polarity of the terminals on the PSU is:
Positive (V+)
Positive (V+)
Negative (-)
Negative (-)
The red cable (positive) may have a black stripe on it. Similarly, the black cable (negative) can have a red stripe on it.
Do not connect any cables yet, wait until you have prompted.
Connecting the PSU (Black PSU)
Connecting the PSU (Black PSU)
Connecting the PSU (Black PSU)
Take two RED wires and slide the fork connectors all the way into the first two (positive) terminals from the left on the bottom of the PSU. Make sure the steel washer is above the "fork" connector.
Point the bent part of the fork upwards.
Tighten the terminal screw firmly.
Keep in mind some parts are made out of plastic. When tightening each of the terminal screws, proceed carefully.
Take the BLACK wires and slide them all the way into the last two (negative) terminals. Make sure the steel washer is above the "fork" connector.
Tighten the terminal screw firmly.
Check all the connections again! The red wire is in the first slot and black in the third. Make sure that cables are tightened properly. Otherwise, there is a risk of a damage to the printer and its surroundings!
Connecting the power panic (Black PSU)
Connecting the power panic (Black PSU)
Connecting the power panic (Black PSU)
Connecting the power panic (Black PSU)
Connect the power panic cable into the PSU. Use the side with the black connector at the end.
Check all the connections again! The red wire is in the second slot and black in the fourth. Make sure that all the cables are properly tightened. Otherwise, there is a risk of damage to the printer and its surroundings.
Place the psu cover over the power terminals. Make sure the "PRUSA" logo is facing upwards.

Attach the cover by using the two M3x10 screws through the marked openings. Note the openings are quite deep.

Make sure the cover is seated properly and no cable is being pinched underneath.
Take a look from the bottom of the PSU and guide all the PSU cables through the cable clips according to the picture.
Do not guide the Z motor through the cable clips.
Guiding the power cable bundle (Black PSU)
Guiding the power cable bundle (Black PSU)
Guiding the power cable bundle (Black PSU)
Slide the zip tie through the circular holes in the frame to create a loop on both sides of the frame so that the cable goes through both loops.
Start tightening the zip tie so it is snug and holds the wires on both sides.
Be careful not to over-tighten the zip tie as it could damage the wires. 
Cut off the remaining part of the zip tie very carefully.
Guiding the power cable bundle (Black PSU)
Guiding the power cable bundle (Black PSU)
Guiding the power cable bundle (Black PSU)
Continue guiding the cables toward the xBuddy. Include the Y motor cable into the bundle.
Secure it with another zip tie to the frame.
Carefully guide and fold the xLCD cable under the cable bundle. Do not include the xLCD cable in the cable bundle. Guide it under the cable bundle and leave it free for now.
Guide the PE cable from the xLCD through the cutout in the frame and include it in the cable bundle.
Secure the cable bundle with the zip tie.
Connecting the PSU cables (Black PSU): PE cable
Connecting the PSU cables (Black PSU): PE cable
Connecting the PSU cables (Black PSU): PE cable
Connect the PSU cables into the xBuddy board in this order (starting from the left with the first pair of the PSU cables):
Red power cable (positive) or just the red stripe on the black cable
Black power cable (negative)
Red power cable (positive) or just the red stripe on the black cable
Black power cable (negative)
Secure all power cable connectors with the terminal screws. Tighten the screws gently but firmly.
Connect the power panic cable to the white connector on the bottom of the xBuddy board.
Verify the correct placement of the cables comparing it to the picture. This is crucial! Incorrect wiring may cause damage to your printer!
Now, skip to Securing the PSU cables.
PSU - PE cable (Silver PSU): parts preparation
PSU - PE cable (Silver PSU): parts preparation
PSU - PE cable (Silver PSU): parts preparation
PSU - PE cable (Silver PSU): parts preparation
The following steps are intended for the silver PSU only.
For the following steps, please prepare:
PE cable extension (1x)
M3w washer (1x)
M3x6 screw (1x)
M4x5 screw (1x)
M3nEs nut (1x)
Zip tie (5x)
Inserting M3nEs nut (Silver PSU)
Inserting M3nEs nut (Silver PSU)
Inserting M3nEs nut (Silver PSU)
The following steps are taken from another printer upgrade guide. Therefore, parts such as the Y-carriage are missing. However, this does not have any effect on the silver PSU connection process.
From the inner PSU side of the short extrusion, insert the M3nEs nut between two cable clips.
The exact position of the nut doesn't matter.
Guiding the PE cable (Silver PSU)
Guiding the PE cable (Silver PSU)
Guiding the PE cable (Silver PSU)
Carefully turn the printer on the PSU side.
Take the single end of the PE (not the forked end) cable that is already installed on the printer. Guide the cable through the right cable clip.
Connecting the PE cables (Silver PSU)
Connecting the PE cables (Silver PSU)
Connecting the PE cables (Silver PSU)
Connecting the PE cables (Silver PSU)
Take the free end of the PE cable guiding from the printer and line up the connector with on of the connector of the extended PE cable.
Push the M3x6 screw and the M3w washer through the both connectors.
Attach the joint of cables to the M3nEs nut in the extrusion profile and secure it by fully tightening the M3x6 screw.
The free extended PE cable must be in the left position and lead freely outside the printer.
Connecting the extended PE cable (Silver PSU)
Connecting the extended PE cable (Silver PSU)
Connecting the extended PE cable (Silver PSU)
Connecting the extended PE cable (Silver PSU)
Merge both PE cables and attach them with the zip tie to the left cable clip.
Note two threaded screw holes in the silver power supply unit (PSU). Secure the extended ground connector to the "upper" hole using the M4x5 screw.
Guide all PSU cables through the right cable clip.
Guiding the Z motor right cable (Silver PSU)
Guiding the Z motor right cable (Silver PSU)
Guiding the Z motor right cable (Silver PSU)
Slide the zip tie through the circular holes in the frame to create a loop on both sides of the frame so that the cable goes through both the loops.
Start tightening the zip tie so it is snug and holds the wires on both sides. Be careful not to over-tighten the zip tie as it could damage the wires. Cut off the remaining part of the zip tie very carefully.
Guiding the power cable bundle (Silver PSU)
Guiding the power cable bundle (Silver PSU)
Guiding the power cable bundle (Silver PSU)
Continue upwards and using another zip tie create the next loop.
Guide the Z-axis cable and all cables from the PSU through the zip tie.
Place the PE and power cables at the bottom of the 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.
Guiding the power cables (Silver PSU)
Guiding the power cables (Silver PSU)
Guiding the power cables (Silver PSU)
Continue guiding the cables toward the xBuddy. Include the Y motor cable into the bundle.
Secure it with another zip tie to the frame.
Carefully guide and fold the xLCD cable under the cable bundle. Do not include the xLCD cable in the cable bundle. Leave it free for now.
Guide the PE cable from the xLCD through the cutout in the frame and include it in the cable bundle.
Secure the cable bundle with the zip tie.
Extending the power panic cable (Silver PSU)
Extending the power panic cable (Silver PSU)
Extending the power panic cable (Silver PSU)
Extending the power panic cable (Silver PSU)
Using the 3/32 PT screw, attach the power panic extended cable connector to the last (right) power terminal slot. Do not completely tighten the terminal screw! A few turns are enough for now, we will fully tighten the screw later.
The cable must be free to move.
Connect the white connector of the power panic extended cable to the slot labeled PWR PAN. on the xBuddy board.
Leave the black connector of the power panic extended cable free for now.
Note that most of the following steps are taken with a black PSU and without power panic extended cable. However, specific instructions will be provided if there are differences for the silver PSU.
Pre-screw three 3/32 PT screws into the terminals on the xBuddy board. Do not tighten the screws completely, 3-5 turns will be sufficient.
Connecting the PE cable (Silver PSU)
Connecting the PE cable (Silver PSU)
Attach the PE cable connector to the right lower screw hole in the xBuddy box. Secure the cable with the M3w washer and the M3x6 screw. Tighten the screw firmly.
Note the correct orientation of the PE connector.
Guide the PE cable so that it does not interfere with the threaded hole under the xBuddy board.
Connecting the PSU cables (Silver PSU)
Connecting the PSU cables (Silver PSU)
Connecting the PSU cables (Silver PSU)
Plug the power cables under the pre-screwed terminals screws on the xBuddy board in this order (starting from the left with the first pair of the PSU cables). :
Red power cable (positive)
Black power cable (negative)
Red power cable (positive)
Black power cable (negative) - connect together with the extended power panic cable. The extended power panic cable must be underneath.
Secure all power cable connectors with the terminal screws. Tighten the screws firmly.
Verify the correct placement of the cables comparing it to the picture. This is crucial! Incorrect wiring may cause damage to your printer!
Securing the PSU cables
Securing the PSU cables
Securing the PSU cables
Divide the cable bundle into two paths:
Insert the zip tie through the bottom hole in the cable clip.
See the detail showing an example how to guide a zip tie through the cable clip.
Guide the cables from the PE cables, PSU cables and Power Panic cable around the left side of the cable clip.
Guide the xLCD cable and motor cables around the right side of the cable clip.
Very gently tighten the cables with the zip tie. Cut off the remaining zip tie.
Guiding the Z motor left cable
Guiding the Z motor left cable
Guiding the Z motor left cable
Push the zip tie through the frame under the Z motor left.
Guide the Z motor left cable through the cutout in the frame to the xBuddy box.
Carefully tighten the zip tie. Cut off the excess of the zip tie.
Do not overtighten the zip tie, it may fatally damage the cable.
Connecting the motor cable adapters
Connecting the motor cable adapters
Guide all motor cables (labeled Y, Z, Z) out of the printer.
Plug each motor cable into the motor cable adapter. You will feel a slight click when the connector is properly plugged in.
Connecting the motor cables
Connecting the motor cables
Connecting the motor cables
Connecting the motor cables
Connect the Y motor to the second slot from the left. Guide the cable along the right side of the xBuddy box and behind the edge of the xBuddy board.
Connect the Z motor cables to the third and fourth slots. The order of wiring does not matter.
Leave space around the first slot for plugging in another cable which will be connected later on.
Connecting the xLCD cables
Connecting the xLCD cables
Connecting the xLCD cables
Connecting the xLCD cables
Connect the xLCD to the slot on the right side of the xBuddy. Note the safety latch on the xLCD cable connector. The latch must fit into the upper side of the connector.
Make sure that all the cable guiding over the zip ties in the xBuddy box, not under the zip ties.
Arrange the xLCD cable like in the picture. The xLCD must covering the cable bundle. Tighten the cable bundle with the first two zip ties in the bottom of the xBuddy box. Do not overtighten the zip ties!
Haribo
Haribo
Eat eight gummy bears.
Did you know that the original gummy bears were inspired by the dancing bears of Europe, and Riegel named them "Gummibärchen," which means "little rubber bears" in German.
That's it
That's it
The xLCD assembly and PSU cables are just in place.
Let's continue to the next chapter 6. Heatbed upgrade
Was this guide helpful?

Comments

Still have questions?

Still have questions?

If you have a question about something that isn't covered here, check out our additional resources.
And if that doesn't do the trick, you can send an inquiry to [email protected] or through the button below.

Contact us