RUG/Pennsylvania/State College/Printers/PSU Unit B

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Revision as of 17:24, 15 September 2011 by Bjs5286 (talk | contribs) (Mendel Generation 3 Current Condition)
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On this page you will find the current status of the Unit B Mendel. Also, this is will be a staging area for our personal edits to the various instruction wikis on the RepRap site. Our Mendel Unit is a Techzone Gen 3 Laser-cut Mendel. So far, no major design components have been changed from what you get from Techzone.

Most of the information below will be incorporated in the LaserCut Mendel Assembly page.

Mendel Generation 3 Current Condition

Staging Area for Instructions

The information below will be where our group first posts instructions for the Mendel unit before moving it to LaserCut Mendel Assembly page. This information will most likely be incomplete and/or not in a logical order. If you are building a Laser-Cut Mendel, got to the link above for the instructions.

X Axis

The X-axis of the Mendel holds the extruder and allows it to move laterally left and right. The X-axis jig is also part of the Z-axis as the entire X-axis moves up and down along the Z-axis.


  1. Gather the laser cut parts shown in the picture to the right. Also, have the nuts, bolts and washers bag close at hand.
  2. First, assemble the “right hand side” (in reference to the picture in step 1). Be sure to start with the larger piece facing the way it is shown in this picture.
  3. Put washers on the screws (see note) and push screws through “side pieces” and through the base piece as shown.
    Note: You may want to put 3 washers on each of the outer screws if you are using the screws shown in the image(the picture only shows 1 on each). This is because the screws being used have an un-threaded portion that will not allow the pieces to tighten unless extra washers are used. It might be easier, however, to add the extra washers in step 6.
  4. Flip the piece over so that the threaded part of the screws point up. See here.
  5. Place large nut in receptacle and then put the wood cap over top. See here.
  6. Put washers and nuts on the screws. See here
    Note: As noted in step 3, you may need to add extra washers here in order for the nut to tighten properly.
    Note: Two of the washers may not fit all the way down onto the screw (See here). To rectify this, grind or cut one edge of the washer so that it will sit flush with the wooden base
  7. Now assemble 5 bearing bars as shown here. Only put one bearing on each of the bars for now. Also be sure that there is a washer on either side of the bearing so that it can move freely. This will be important for the rest of the build; if you have a bearing, it should always be sandwiched between 2 washers, unless noted otherwise.
  8. Take 2 of the bearing bars you just made and put them through the slot shown in this picture. Then assemble the bearing on the other side of the bar.
  9. Now assemble the 2 belt bearings and attach them as shown here.
  10. You should now have this: front, right, left, back.


Rather than use the TechZone electronics layout and use the two boards they gave us, we decided to re-drill one board, allowing us to have all of our electronics in one single location; the advantage? Less cables to run, a cleaner and more organized machine, and easy access to all of the boards for adjusting pots, accessing reset buttons, etc. Pictures and more detailed layouts along with models of the modified electronics mounting board to come soon.

State College RepRap Users Group
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