1.4 Prep the Print Bed
-While the Y axis assembly is free, it is a good time to prepare the print bed which you will attach later.
+While the Y axis assembly is free, it is a good time to prepare the print
+bed which you will attach later.
Gather the following materials
mount with a line that is approx 10mm from the back edge of the bed.
* Mark all the holes for the bearing holders with a pencil.
* Remove the wood print bed and drill all the holes you marked with a 5mm
- drill bit. (You want the holes a little over-sized so that there is some
- room for the screws to "float" when you attach the bed).
-* Attach the linear bearing holders to the Y axis linear bearings with zip ties.
+ drill bit. (You want the holes a little over-sized so that there is
+ some room for the screws to "float" when you attach the bed).
+* Attach the linear bearing holders to the Y axis linear bearings with
+ zip ties.
Set the prepared wood print bed aside.
end until the threaded rods rest against the Z axis motor shafts.
* Tighten the z axis couplers.
-7. Mount X and Y motors
+7. Completing the Frame Assembly
-7.1 In addition to the frame from the previous step, you will need:
+7.1 Mount X and Y motors
+
+* In addition to the frame from the previous step, gather the following:
a. Two NEMA17 stepper motors
b. Two belt pulleys
c. The two idler bearings and mounts
d. Three M3 x 10mm screws
e. Three M3 x 14mm screws
- f. Two screws with lock nuts for mounting the belt idlers (probably M3 x 25mm)
+ f. Two screws with lock nuts for mounting the belt idlers (probably
+ M3 x 25mm)
+
+* Mount the motors to the X and Y axis motor mounts using three screws
+ each.
+* Fit a pulley on each motor shaft and tighten the grub screws to keep
+ them secure.
+* Snap an idler bearing into each pair of plastic bearing guides, then
+ attach the idlers to the opposite ends of the X and Y axis from where
+ you attached the motors. Don't overtighten the screws that hold on
+ the idlers.
+
+7.2 Attach print bed
-* Mount the motors, the pulleys, the idlers.
-* Mount the print bed you prepared earlier to the Y axis bearing holders
- using Eight M3 x 14mm screws and an equal number of M3 nuts and washers.
- The washer should go on the screw first, which should go downward
- through the wood print bed and bearing holder, and secured with a nut.
- Attach each screw only loosely first, then check that the bed slides
- smoothly back and forth along the Y axis. Tighten the nuts a little at
- a time until secure.
+* You will need:
-7.2 Attach the X carriage.
+ a. The print bed you prepared earlier.
+ b. Eight M3 x 14mm screws and an equal number of M3 nuts and washers.
-You will need:
+* Mount the print bed to the Y axis bearing holders. The washer should
+ go on the screw first, which should go downward through the wood print
+ bed and bearing holder, and secured with a nut. Attach each screw only
+ loosely first, then check that the bed slides smoothly back and forth
+ along the Y axis. Tighten the nuts a little at a time until secure.
+
+7.3 Attach the X carriage.
+
+* You will need:
a. The printed X carriage
b. Eight miniature zip ties
+* Attach the X carriage with the belt guide "up" and with the flat
+ surface (where you will attach the extruder) toward the front of the
+ printer (the Y idler end).
+
+8. Attach Belts
+
+* You will need:
+
+ a. The X axis drive belt.
+ b. The Y axis drive belt.
+ c. The Y belt holder.
+ d. Two M3 x 14mm screws and nuts.
+ e. 8 Miniature zip ties.
+
+* Thread the X axis belt into place and secure with four zip ties (two
+ on each side of the extruder, trimmed short after tight).
+* Turn the printer over or have a friend hold it upside down, being
+ careful not to lift by or put pressure on the X axis rods.
+* Thread the Y axis belt into place. Hold the belt tight and use as a
+ guide for placing the Y belt holder. The leading edge of the belt
+ holder should be approximately in the middle of the wood print bed.
+* Mark the holes for the Y belt holder, then set the holder and belt
+ aside and drill the two holes with a 4-5mm hand drill.
+
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