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(3) Engineer Scriber
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(4) Super Lube + Injector
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(5) Isopropanol
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(6) 8mm y-Alignment Tool
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(7) 10mm y-Alignment Tool
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(2) 2x y-Rods 360mm
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(3) 3x LMU10 Linear Bushing
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(4) 3x y-Bearing Holder
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(5) y-Belt Holder
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(1) 8x M3 Black Washers
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(2) 3x M3 Nuts
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(3) 8x M3 Self-Securing Nuts
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In preparation for later, 3x LMU10 Bushings must be placed in isopropanol for 15min.
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To save time, you can now already prepare the 3x LUMW10 Bushings and the LMU10 Bushings. You will need these parts later for the construction of the x-axis.
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Insert 2x M3 Self-Securing Nuts into the sides of each y-bearing holder.
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While doing so, check the alignment through the hole on the top of the y-bearing holder.
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Pay attention to the alignment of the balls. The bushings should be inserted in such a way that the ball guide grooves are positioned at 45° to the vertical line.
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Take one of the LMU10 bushings you have previously soaked in isopropanol, and insert it into the y-bearing holder.
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Please note that the bushing can only be inserted from one side.
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Secure the bushing by inserting an M3 Self-Securing Nut (using an engineer scriber) into one side of the y-bearing holder.
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They are then lightly tightened with a M3x16mm Hexagon Socket Head Cap Screw.
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Now open the Super Lube tube and screw the injector onto it.
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Place the bushing inside the y-bearing holder on the injector. Distribute the Super Lube inside the bushing.
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The bearing is sufficiently greased when the grease oozes out of both ends of the bushing.
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Repeat these steps for the other two y-bearing holders.
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The three assembled bearing holders can now be placed in the holes in the y carriage.
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Here, you must pay attention to the alignment of the y-bearing brackets, since on the side on which two y-bearing holders are installed, the flattened sides must face outwards (see Fig. 2).
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Each y-bearing holder gets loosely attached to the y-carriage with 2x M3 Washers and 2x M3x14mm Hexagon Socket Head Cap Screws.
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The y-bearing holders should still be easily moveable.
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Insert 2x M3 Self-Securing Nuts, (using e.g. an engineer scriber), into the holes of the y-belt holder.
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Place the y-belt holder on the y-carriage as shown in Fig. 2.
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Make sure that the teeth for the belt point to the side with the single bushing.
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The y-belt holder is attached from the top with 2x M3 Washers and 2x M3x16mm Socket Head Cap Screws.
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Carefully slide the 2x y-rods through the three bushings and place them on the y-rod holders.
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Make sure that the side of the y carriage where the two bushings are located, is on the left side of the frame.
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When the y carriage is correctly aligned, press the rods into the four y-rod holders.
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Place the 10mm y-alignment tool at the bottom of the frame's left y-axis and press the rod against it.
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Then place the alignment tool on top of the left y-axis and press the rod against it here as well.
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Once you have correctly aligned the rod, fasten the 4x M6x12mm Socket Head Cap Screws inside the y-rodholder at (1) the left front and (2) the left rear.
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Then move the y carriage to the far front and fasten the 2x M6x12mm Socket Head Cap Screws in the y-rod holder on the right front.
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Move the y-carriage to the far rear and fasten the 2x M6x12mm Socket Head Cap Screws in the y-rod holder at the right rear.
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Move the y-carriage back and forth while gradually tightening the 6x M3x14mm Socket Head Cap Screws on the y-bearing holders.
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Do not fully fasten the screws immediately. Fasten each screw with only half a turn for the time being.
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Keep moving the carriage back and forth to make sure it can move freely.
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If the y-carriage runs a little out of round, both loosening and tightening the screws on the y-bearing holders several times and realigning the rods can help.
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The heat bed carriage for MK52 is now completely installed.
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Continue with instructions 04. Installing the y-Belt.
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