Mini Desktop Escalator

thingiverse

# Overview A mini, working model of an escalator. Turns via a knob on the right side. Motorized version available at https://www.thingiverse.com/thing:5375662. Latest Fusion file: https://a360.co/3JnNqV1 Video: https://youtu.be/95yZLk6EauM Update 4/20/22: Tweaked the end plates to reduce potential cracking and increase step clearance # Non-printed parts - 13 M3x12mm bolts - 12 M3 nuts # Printed parts Print 64 chain links, 32 steps, and 2 end plates. Print 1 of each of the other parts. It is critical that your printer is well-calibrated precisely leveled before printing these parts. The steps in particular are very sensitive to bed leveling/adhesion. You'll want the first layer to squish only as much as is required to prevent warping; any overextrusion or elephant's foot will prevent the steps from running smoothly. I recommend applying some elephant foot compensation in your slicer to make sure the first layer is the same width as the others. ## Assembly This is pretty tricky. I assembled in the following order: 1. Starting with the right side, lay the right outer guide down onto your work surface. 2. Secure the right track guide to the right outer guide with 2 bolts and nuts. 3. Place the right handrail mid guide on top of the right outer guide. The right track guide should be in the middle, so that they form a double path for the steps to ride on. At this point I attached the handrail guide to the outer guide by bolting each of the 4 corners, in order to make assembly easier. Note that these bolts will have to be removed when putting on the end plates. 4. With the right side pieces assembled, there should be 2 channels visible. Insert the steps so that the longer pin sits inside the outer channel and the shorter pin sits inside the inner channel. When done, the upper and lower sides should already look like a staircase. 5. Now, take the left side track guide and place it on top of the loop of steps (the non-flat side should be facing the steps). Make sure the inner (shorter) pins slot correctly into the inner channel on the left track guide. You may have to push inward on each of the steps to get the track guide to go down all the way. 6. Place the left handrail guide on top of the loop of steps. The outer (longer) pins of the steps should now be sandwiched between the track guide and the handrail guide. 7. Start placing chain links on the pins, following an alternating pattern. First join pairs of steps together with the chain links (making 16 pairs of steps), and then join the pairs together. All of the steps should now be connected by the links. 8. Once all the left side chain links are installed, place the non-drive side sprocket onto its spot in the top left, with the flat side of it facing away from the steps. 9. Place the left outer guide on top of the existing assembly, making sure that the longer pins on the steps go into the slotted track on the left outer guide. 10. Attach the left outer guide to the left track guide with 2 bolts and nuts. 11. Carefully flip the entire assembly over so that the right side is facing up. 12. Undo the bolts on the right side and remove the right side outer track guide. 13. Now install all the chain links on this side, the same way as you did in step 7. 14. Install the drive side sprocket. Make sure that it's rotated such that the flats on the shaft hole are lined up with the sprocket on the other side. 15. Put the right outer guide back on, and bolt it to the right side track guide. 16. Turn the entire thing upright and place an end plate between the handrail plates, and bolt them together with 4 bolts+nuts. Do the same for the other end plate. 17. Stick the sprocket shaft through the sprockets from the right side. Make sure it goes all the way through to fit inside the non drive sprocket on the top left. Secure this with a bolt on the left side. If I have time I'll post more detailed instructions with pictures on how to assemble this.