Y-Axis Gantries

Last Update: 14 May 2020

 

Y-axis gantries (wheels)

 

Grab the Y-axis gantries (wrapped in paper) and you’ll see four holes on each steel plate in a square formation. Add the wheel sub-assemblies to these holes just like how you did before, with the eccentric nuts placed as pictures and the nylock nuts on the two lower holes; make sure that one is assembled as the mirror of the other. Use a size 4 Allen key and the included 8mm wrench to tighten everything down, but leave the eccentric nuts slightly loose for now.

If you have a hard time getting the eccentric nuts in, we recommend tapping the nuts in with the back of a screwdriver or other dull object. This will help clear the excess paint that might still remain in the hole.

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Install the eccentric nuts into the top two holes.
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V-wheel sets with a washer to keep the v-wheel spaced from the gantry plate.
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Fasten the wheels to the eccentric nuts, leave these slightly loose for now.
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Assemble the bottom two wheels with M5-nylock nuts and tighten all the way.
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Make sure you have both plates done, but with the wheels on opposite sides.

 

Y-axis gantries (anti-backlash)

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On the Y-axis plates, there are two holes for the anti-backlash assemblies to mount. Line up the plastic blocks and secure them to the plate using the same medium-sized bolts that were used for the wheels. The blocks should be mounted on the same side as the v-wheels, and have the tensioning screw facing outwards.

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The Delrin nuts go on the same side as the v-wheels do.
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Tighten until snug. Don’t overtighten!
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Both sides should be mirrored.

 

Mounting the X-axis motor to the left plate

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Make sure you have grabbed the correct gantry (pictured below).

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We will put a 608ZZ flange bearing into the hole.

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Get a motor, the M5 nylock nuts from before, and the bag of long bolts (M5-50) and aluminum spacers from the orange bag. You will also need a coupler and bearing for this assembly, found in the green bag. Note that your coupler may be solid or jaw type, but they both work the same way (jaw type shown below).

Start off by attaching the coupler to the motor shaft, making sure you have the smaller hole sliding onto the shaft and the larger hole facing up so that we can put the lead screw on later. Put the coupler down as far as it will go and loosely tighten the screw to secure it for now. We will adjust this later so there is no need to screw down too hard.

Then put the long M5 bolts onto the motor, followed by the spacers.

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Attach the coupler, spacers, and M5-50mm bolts to the motor.

Carefully line up the screws into the four holes in the Y-axis gantry. Drop the motor, bolts, and standoffs into place. Take note of the position of the white motor connector in terms of its rotation and what side of the plate you are mounting it onto (the side with the wheels).

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Attach motor using M5 nylock nuts.
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Take note of the direction of the motor connector.

Use the four M5-nylock nuts to secure the plate-side of the M5 bolts. This requires a size 4 Allen key and the 8mm wrench. If it’s easier, start by finger-tightening all four nuts to keep everything in place before using the pliers to finish tightening.

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Among the group of plastic parts you should find one that has a thin ‘wing-like’ shape, this is the plastic y-axis drag chain mount. Grab this and clip it onto the aluminum spacers in the orientation shown. We’ve found that it is easiest if you clip on one side first, then swivel the other side on afterwards.

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Once everything is finished getting put together, it should look like this:

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On to the next section!