White Board Magnetic Marble Lift

thingiverse

This thing is for a powered "screw" lift or auger for a companion White Board Marble Track that I have listed under a separate thing. Even though these two things are meant to work together, I separated them because this is complicated enough that it will be easier to not confuse the different pieces that it takes to build either of them. You can see the separate track pieces at; https://www.thingiverse.com/thing:4239477 4/27/2020:I will spend the next few days adding documentation, pics and STLs for this. There are actually three different parts to this lift. There is the powered motor drive that I built purely out of lego parts. There are the printed pieces that make up the outer case and the screw lifts and there is the printed lego style plate to mount the motor drive to the white board with magnets. I'm not going to go into too much detail on the motor drive. I think that there are several different ways to do this and it may simply depend on what parts you have on hand. The end result should yield a drive system that will turn the lift screw at about one revolution per second, at least that's what I am using. I use the lego 71427-002 9V motor with a 9:1 total gear reduction (two sets of 24 tooth and 8 tooth gears) and power it with a 9V battery pack. I have pictures of how I did it. The only important part is to end up with the standard lego axel shaft sticking out one end to go into the lift screw. Look closely at the Base Case to locate the three cross holes that fit the lego axel pieces help position the Base Case and keep it from twisting on the drive motor assembly. Probably the most important dimension is that the center of the drive shaft is 21.6mm from the white board. That is 1 and 2/3 of a regular lego piece thickness (thin pieces are 1/3 as thick as a regular piece) plus the 5.6mm that the center of a side hole is from the bottom of a regular 9.6mm thick piece. The 9.6mm thick motor drive base piece is printed to match my drive motor. Here is where you may have to get creative. The printed case and short screw pieces should be able to be printed without any support. I was able to do that on my Ender 3 with no problem. The 160mm screw pieces will need supports just to hold it up during the print. You should probably print the 160mm tall pieces and the screws on a raft. I had a few break loose from the bed during printing. To join and align the cases use the lego axel shafts with the "+" pattern. The same goes for joining the screws together. You can see what I am talking about by looking at the alignment and joining holes. There are plenty of holes for magnets. I only had to use about half of them to get the entire assembly to stay in one place on the white board. You may have different results depending on your white board and the type of magnets you use so I added plenty of magnet cut outs. Materials: (The links work today. I can't make any claims that they will work tomorrow and if I will be able to update them or verify replacement parts) Marbles: 14mm dia., https://www.amazon.com/gp/product/B07WP8JZSK/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1 Magnets: 15mm x 2 mm, https://www.amazon.com/gp/product/B07G48647D/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1