Open Hardware
Assembly Instructions

Flip the plate over;

Install the momentary switch into the Z mount switch toque to 3in*lbs

Correct the orientation of the two switch contacts to a perpendicular orientation to the cable pathway (seen to the right of the switch)

Loosely secure the Z switch mount to bed plate. Use one (1) stainless M3X16 FHCS towards the inside of the plate, one (1) M3X10 BHCS and one (1) M3 Black washer on the other side. These will be tightened later when the bed is installed.

Loosely secure the Y bearings to the assembly using sixteen (16) M3X8 BHCS and sixteen (16) M3 black washers

Install two (2) SPDT switches using two (2) M2x10 SHCS, secured to hand tight, and two (2) M2 washers onto each end of the Y belt mount with wiring terminals facing each other and the switch actuator away from the plate

Install the belt mount as shown using four (4) M3X8 BHCS, tightened to 3 in-lbs (~.35 N-m), and four (4) M3 Black washers making sure the long switch side is toward wiper mount side of the bed plate.

Place one (1) Left and one (1) Right Y Corner (bottom side of print out) into each of the Y table assembly jigs. The Y assembly jig is a 2 piece fixture that must be used together.

Insert aluminum extrusion into each of the Y corners in one of the Y assembly jigs. Attach these extrusions to the Y corners that are in the second Y assembly jig.

Position the extrusions so they are flush to the end of the Y corners.

Place one (1) T-nut in the left and right side slots on each end of the aluminum strut. (8 used)

Insert one (1) M5X10 BHCS through each hole hole on the sides of every Y corner;

Position a T-Nut in line with each hole and screw. Ensure the extrusion ends are still flush with the T-Nuts, tighten screws to 12in-lbs.

Install four (4) T-nuts into the top slot of each aluminum extrusion (8 total). Tighten to approximately 12 in-lbs.

Place the Y Axis Idler end assembly on one end of the Y table (Idler assembly must be oriented toward the second Y assembly jig), use four (4) M5X 10 BHCS and four (4) M5 Black washers to attach the Y axis Idler end assembly to the two extrusions. Make sure to leave this loose for now.

Place the Y Axis Motor End assembly on the other end of the Y table and use four (4) M5X10 BHCS and four (4) M5 Black washers to attach the assembly to the extrusions. Make sure to leave this loose for now.

Set the height of the pulley on the Y motor shaft to (3.4 mm) as shown with the pulley height jig. Tighten the two (2) set screws 8in-lbst.

Attach the motor to the Motor Mount using four (4) M3x12 BHCS and four (4) M3 Black Washers; tighten to 5in-lbs.

Install the Switch wire harness- Place a M3 star washer over the screw thread next to the Z switch mount, place the two (2) red wire, secure in place with an M3 Nyloc nut. Tighten the nut until the ring terminals are free of any movement. Make sure the M3 star washer is under the terminal rings at the end of the red wires.

A 2mm driver will likely be required to hold the Z min mount screw head (this serves as the ground post) as the Nyloc nut is secured. Both the Z min switch mount and the Nyloc must be well secured.

Put the blue and orange pairs of wires through the hole in the bed plate and push the spade connectors onto the limit switches (the middle blade of the limit switches should be empty.) The orange pair goes on the switch that is on the short side of the belt mount, and the blue pair goes on the switch that is on the long side of the belt mount.

Put the green ferruled wires into the screw terminals on the momentary switch. The switch should be clocked so that the screw terminal block is perpendicular to the close edge of the bed plate. Tighten the screw terminals finger tight.

Use a tie wrap to secure the harness. The wires should have a nice radius at each bend to prevent premature wear.