Assembly step 12

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Revision as of 10:16, 11 April 2013 by Willadams (Talk | contribs) (Bill of Material: add Belt Anchors from Step 8)

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(click the picture to download the PDF file)

Bill of Material

sortable table
Item Qty. Part Num. Title
1 1 Front/Back Panel Front/Back Panel (see above diagram)
2 1 Assm 8 Assembly from Step 8
3 1 Assm 11 Assembly from Step 11
4 5 SM-H07 M5 x 10mm SHCS
5 5 SM-H03 M5 Flat Washer
6 1 SM-M05 Belt Anchor
7 1 SM-H11 Insertion Nut

Belt Anchors

The PDF instructions do not document the belt anchoring. I've seen it done a few different ways, but I guess it's not critical that it's perfect. Use the insertion nuts and belt anchor parts to mount the belt to your X-axis. You'll have to cut the supplied 940mm belt from Inventables in half and save the rest for the Y-axis! There is some discussion on alternate Belt_Anchors methods.

Here is a video of my X-axis moving during a test of the belt and motor:

An image of the belt anchors and dodgy alignment!

Belts 5.JPG

There are also other ways of doing the belt clamps, as documented here. It is also important to note that the belt needs to be tight. If the belts are not tight, then there will be significant slop in the machine. Tighten the belts so that when turning the pulley one step, the machine tracks perfectly.

  • Mount Belt (cut the full size belt in half)

User Submitted Notes

(This is the section to add your own notes pertaining to this sub-assembly) If you run into a problem or find yourself asking a question, please post the solution here to help the next person who has the same problem/question)


The following steps are assuming that the front plate is attached to the makerslide, screws still loose.

1. Slide the gantry back and fourth a couple of times to even out the rails and get everything roughly lined up. It may still feel stiff when sliding, but you can adjust that later.

2. Slide the gantry to the back plate. Both V-wheels should be touching or at least be the same distance from the back plate. Carefully snug up the four screws on the back plate.

3. Gently slide the gantry to the front plate. Both V-wheels should be touching or at least be the same distance from the front plate. Carefully snug up the four screws on the front plate.

4. Slide the gantry back and fourth a couple times to see if anything is askew. *Note: It may be tough to move your gantry, almost like it is binding, this is fine as you'll adjust that in the next set of steps.


1. Loosen the four V-Wheels that are mounted with the eccentric nuts. You should notice some slight play once loosened.

2. Slide the gantry back and fourth. It should feel like it is gliding freely and smoothly. Remember how this feels as this is what we are striving to reach.

3. Taking one V-Wheel at a time, adjust the eccentric nut and fully tighten it. Slide the gantry back and fourth, is it still how it felt from step 2? If yes, then move on to step 4. If no, then repeat this step until you achieve smooth, gliding motion.

4. Repeat step 3 until all V-Wheels are properly adjusted.

--PLHS54 17:23, 27 June 2012 (CDT)

  • Here's an easy way to get close to where the tension on the v-wheels should be. Loosen the adjustable wheel all the way. You should be able to easily turn the fixed wheel opposite it. Slowly tighten the adjustable wheel until the fixed wheel won't turn without moving the carriage, and the tension is set.

Next: Assembly step 13