PB. MK3 Top and doors assembly

Step 1 Mouting the top cross-beam

On this step we need :

PrusaBox top

Crossbeam

Position the top cross-beam as shown and fix the cross-beam to the roof with 5 M4 screws and 5 M4 nuts (screw heads on the outside)

If you plan to add LED lights, don’t screw now the two extremities screws.

Step 2 Preparation of corner pieces

Take the 4 top corners: all parts are different.

Insert M4 nut in each of the indicated slots

Don’t forget to insert M4 nut on top slot (top back corners only)

If you will install the LED option, insert the square nuts on the front corner pieces (2 nuts per corner piece)

Step 3 Fitting the corner pieces (1/3)

Please note: each corner piece is different and has its own location.

Front right corner

Front left corner

Back right corner

Back left corner

Step 4 Fitting of corner pieces (2/3)

Slide the front corner pieces into place.

A little pressure may be required.

Printed part and steel frame must be align.

Fix the front left corner with 4 M4 screws.

Fix the front right corner with 4 M4 screws.

Step 5 Fitting of corner pieces (3/3)

Slide the back corner pieces into place. 

Fix the back left corner with 4 M4 screws.

Fix the back right corner with 4 M4 screws.

Step 6 Placement of the logo plate

Logo plate: left part

Logo plate: right part

Fix the plate to the roof of the printer-box with 6 M3x6mm screws. There is no need for nuts: this part of the printer-box will not be subject to any pressure.

Double check that the logo plate it on the right position: middle thicker part have to be closed to holes for top door hinges.

It is now time to add some mods if you want them!

Step 7 Assemble the “quick top remove” corners

You can skip this step if you printed old version of corners

We are going to slightly bend this side of uprights. They all have this similar shape on one side.

Use the bending guide to make the shape. The metal frame must fit in bending guide’s notch.

This bending will create a spring effect, that will allow you to remove easily the top part of your enclosure.

You can follow these two videos :

• Metal bending
• Corners assembly

Slide the half corner in the bent upright like the picture.

Screw slightly, just to avoid loosing nuts.

Step 8 Installing uprights (1/3)

Left back uprights

Right back uprights

Turn the top of the printer-box over (outer side against the table).

Slide left rear upright from the top with printed corners inserted on the upright.

Then you can slide down the upright. 

You succeeded if left and right hooks are in place and there is no gap on the top.
If not, go back to (yellow arrow).

Fix left rear upright twith 4 M4 screws.

Fix right rear upright twith 4 M4 screws.

Depending on how the the corner pieces were printed, you may have to force a little.

Step 9 Installing uprights (2/3)

Place the roof on the back uprights that you assembled on the previous step.

Step 10 Installing uprights (3/3)

Front right upright

Front left upright

Position right upright in front of  corner piece as shown.

Slide right front upright so that it clips to the top of the printer-box.

Fix right front upright with 3 M4 screws.

Fix left front upright with 3 M4 screws.

Step 11 Fitting the fixed hinges (1/3)

Start by sorting the fixed hinges:

Hinges type A

Hinges type B

Insert M3 square nuts in all hinges

Insert 3mm pins in all hinges.

Hinges should be inserted as showned.

Step 12 Fitting the back left fixed hinges (2/3)

Fix hinges type B for the left door and, on the inside, the vertical cable mounts using 4 M3x12 screws.

Step 13 Fitting the other fixed hinges (3/3)

Assemble hinges type A for the front, top, back and right doors with 2 M3x6 screws by screwing from the inside.

You can already install the webcam rail on the front-right upright part if needed.

Step 14 Preparation of the Plexiglass sheets

Kit includes 5 plexiglass plates :

2pcs biggest size for side doors 

2pcs middle size for front and back doors

1pc small size for top door

Remove the protective films from the Plexiglas doors.

Step 15 Preparation of doors printed parts and doors handles

Hinge type B

Hinge type A

Top door handle

Lock

Insert M3 square nut into each slot.

Step 16 Mounting the left door

Take a side door.

Place the angled corner as showned.

Fix 2 type A hinge with 4 M3x6 screws. Double check to fix it with screw head against table.

Caution: do not overtighten the screws to avoid splitting the Plexiglas.

Fix lock with 3 M3x12 screws. Double check to fix it with screw head against table.

Tighten the bolts of the locks sufficiently so that there is a slight resistance but not too much so that the lock is not too hard to open.

Step 17 All doors

All asembled doors:

Left door, check hinge and lock side regarding angled corner position.

Top door, check hinge and handle side regarding asymetrical distance.

Right door, check hinge and lock side regarding angled corner position.

  Front and back doors are the same, check hinge and lock side regarding asymetrical distance.

You have successfully assembled top and doors