Eezybotarm MK2 Extended

I was just wanting to extend the arms and make something that could use maybe as a fun thing to give a back massage. I was learning and using new techniques like the bending arms, dove tails, compression fit tolerances, gears and ratios and generally designing. The design works pretty good so far. Originally the arms were too long and the small motors would fail. Then I realized I needed a stronger power supply which helped but fully extended would still fail. Rather than buying more expensive motors, I decided to see if I could use gear ratios because I only need 90 degrees of the 180 the motors have so i built a way to use 1:2 gears. I used ideas but no parts from the MK2 Plus variation. The nice part about this is that it uses the same motors rather than the upgraded ones. After looking into it, the torque is actually strong on these little cheap motors so I wanted to see if it would work.

Just adding the length. Using the dovetail technique and a little super glue, I had both the horizontal and vertical arms at close to 12 inches each. I reduced the horizontal arm to about 8 inches to save some leverage on the motors. With the gears there is no problem no so I might try and use the 12in horizontal arm again. I didn't upload it because I have not tested it working yet.

I used all the same screws and bolts from the MK2 build. There were a few things I had to figure out and drill to adapt but it all worked without having to buy any extra things. Ideas like screwing the plate to the gear on the horizontal ones. I'll try and take some pictures. later to help if people are using this.

This is actually my first upload and I just got the printer like 3 months ago with no experience in design or anything. A lot of cool stuff on here so I wanted to share what I was doing.