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6. xLCD assembly

6. xLCD assembly
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Last updated 9 days ago
6. xLCD assembly
 Difficulty
Moderate
 Steps
42
 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
Needle-nose pliers for tightening and cutting zip ties
Torx key T8/10
Phillips screwdriver
xLCD assembly: distinguish versions
xLCD assembly: distinguish versions
Before starting this chapter, check what version of xLCD you have and follow the appropriate instructions. 
The xLCD version can be recognized by the location of the PE Faston symbol on the back of the xLCD board:
Version A - the PE Faston symbol is located on the top left hole. For this version, follow step xLCD assembly (version A): parts preparation (part 1)
Version B - the PE Faston symbol is located on the bottom right hole. For this version, follow step xLCD assembly (version B): parts preparation (part 1)
Note: There is no functional difference between the xLCD boards. The only difference is the position of the PE mounting point and compatible printed parts.
xLCD assembly (version A): parts preparation (part 1)
xLCD assembly (version A): parts preparation (part 1)
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...
Installing the xReflector sticker (version A)
Installing the xReflector sticker (version A)
Installing the xReflector sticker (version A)
Installing the xReflector sticker (version A)
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 (version A)
Assembling the xLCD-support-right (version A)
Assembling the xLCD-support-right (version A)
Assembling the xLCD-support-right (version A)
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.
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 (version A)
Installing the PE Faston (version A)
Installing the PE Faston (version A)
Installing the PE Faston (version A)
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.
xLCD cables (version A): parts preparation
xLCD cables (version A): parts preparation
xLCD cables (version A): parts preparation
For the following steps, please prepare:
PE cable 460/420 mm (1x)
The xLCD package might display an image of the PE cable that has round connectors on each end, instead of a cable with a faston connector on one end. This will be fixed on new labels soon.
xLCD cable (1x)
xLCD-knob(1x)
M3x10 screw (4x)
Connecting the PE cable (version A)
Connecting the PE cable (version A)
Connecting the PE cable (version A)
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.
Now, go to step 21. Attaching the knob where the instructions are common for both versions of xLCD.  However, keep in mind that some of the parts may be visually different.
xLCD assembly (version B): parts preparation (part 1)
xLCD assembly (version B): parts preparation (part 1)
For the following steps, please prepare:
xLCD (1x)
Remove the protective film from the xLCD screen.
xLCD-cover (1x)
xLCD-support-right (1x)
xLCD-support-left (1x)
xReflector sticker set (1x)
The list continues in the next step...
Installing the xReflector sticker (version B)
Installing the xReflector sticker (version B)
Installing the xReflector sticker (version B)
Installing the xReflector sticker (version B)
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 (version B)
Assembling the xLCD (version B)
Assembling the xLCD (version B)
Assembling the xLCD (version B)
Insert the M3n nut into the corresponding opening in the xLCD-cover.
Tip: for better insertion of the nut, screw the nut onto the tip of one of the longer screws and push it into the hole. Then remove the screw.
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.
Assembling the xLCD-support-right (version B)
Assembling the xLCD-support-right (version B)
Assembling the xLCD-support-right (version B)
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.
Secure the xLCD-support-right and the xLCD board with two M3x8rT screws.
Assembling the xLCD-support-left (version B)
Assembling the xLCD-support-left (version B)
Assembling the xLCD-support-left (version B)
Attach the xLCD-support-left on the xLCD board and align it with three holes in the board.
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 three M3x8rT screws.
Avoid scratching the xLCD board while tightening the screws. 
xLCD cables (version B): parts preparation
xLCD cables (version B): parts preparation
xLCD cables (version B): parts preparation
For the following steps, please prepare:
PE cable 460/420 mm (1x)
The xLCD package might display an image of the PE cable that has round connectors on each end, instead of a cable with a faston connector on one end. This will be fixed on new labels soon.
xLCD cable (1x)
xLCD-knob(1x)
M3x10 screw (4x)
Connecting the PE cable (version B)
Connecting the PE cable (version B)
Connecting the PE cable (version B)
Connecting the PE cable (version B)
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.
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.
Bend the PE Faston down slightly so that it does not protrude too far from the back of the display. Curve the cable according to the drawing on the board.
The following steps are common for both xLCD versions. However, keep in mind that some of the parts may be visually different.
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.
Connecting the PSU: parts preparation
Connecting the PSU: parts preparation
Connecting the PSU: parts preparation
Connecting the PSU: parts preparation
For the following steps, please prepare:
PSU-cover (1x)
M3x10 screw (2x)
xBuddy power cable (2x)
Power panic cable (1x)
The latest versions of the Power panic cable have two wires - black and white. However, the procedure is the same for both versions.
Zip tie (4x)
Connecting the PSU: PE cable
Connecting the PSU: PE cable
Connecting the PSU: PE cable
Connecting the 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
Power cables info
Power cables info
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 (V-)
Negative (V-)
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 (part 1)
Connecting the PSU (part 1)
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 screws firmly.
Keep in mind some parts are made out of plastic. When tightening each of the terminal screws, proceed carefully.
Connecting the PSU (part 2)
Connecting the PSU (part 2)
Connecting the PSU (part 2)
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 screws firmly.
Check all the connections again!

The red (+) wires are connected into the two terminals on the left.

The black (-) wires are connected into the two terminals on the right.
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
Connecting the power panic
Connecting the power panic
Connecting the power panic
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.
Guiding the Z motor right cable
Guiding the Z motor right cable
Guiding the Z motor right cable
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
Guiding the power cable bundle
Guiding the power cable bundle
Continue downwards 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
Guiding the power cables
Guiding the power cables
Guiding the power cables

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.
Guide all cables from the PSU through the cable-clip. Leave the ends of the cables free for now.
Connecting the X and Y  motor cables
Connecting the X and Y  motor cables
Connecting the X and Y  motor cables
Connect the X motor cable to the first slot from the left on the top of the xBuddy.
Connect the Y motor cable to the second slot from the left on the top of the xBuddy. Guide the cable alongside the xBuddy box over the zip ties.
Connecting the PSU cables: PE cable
Connecting the PSU cables: PE cable
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:
Connecting the PSU cables:
Connecting the PSU cables:
Connect the power panic cable to the white connector on the bottom of the xBuddy board.
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)
Black power cable (negative)
Red power cable (positive)
Black power cable (negative)
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
Divide the cable bundle into two paths:
Guide the cables from the PE cables, PSU cables and Power Panic cable around the left cable clip from the right side
Guide the xLCD cable and motor cables in between the right cable clip and the frame
Secure all cable paths with the zip tie to the cable clip. See the detail showing how to push a zip tie through the cable clip.
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 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 all the cables guide through the zip ties in the xBuddy box, not under them.
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!
Connecting the extruder main cable
Connecting the extruder main cable
Connecting the extruder main cable
Connect the extruder main cable to the slot in the right side of the xBuddy.
Arrange the cable according to the picture. Tighten the cable bundle (extruder main cable and the motor cables) with the two upper zip ties. Do not overtighten the zip ties!
Time for energy delivery!
Time for energy delivery!
It was almost like rocket science, but you did it! Take six gummy bears.
Did you know that some gummy bear manufacturers offer sugar-free versions of the candy, which are sweetened with artificial sweeteners like maltitol or stevia.
Almost there!
Almost there!
Wasn't as hard, right? You are almost there!
Just compare the xLCD assembly and the cable management to the pictures.
Let's go the next chapter: 7. Y-carriage & Heatbed assembly
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