A project log for Antigravity Arm Floats

Wheelchair mounted orthoses to enable someone with very low muscle tone to move her arms without the encumbrances of gravity

mike-turveyMike Turvey 10/10/2016 at 09:550 Comments

I print just about everything using ABS. There are a couple reasons. For one, I live in a desert. It gets crazy hot, and I can't count on the thermal stability of PLA. But another, perhaps bigger reason is that ABS is such an easy material to work with. If you make a mistake or something breaks, you can usually fix it instead of having to print an entirely new part. Here's an example of a broken part I was able to fix fairly easily tonight.

Here, you can see where one of the plastic chain pieces has cracked.

Applying a small amount of acetone will "melt" the ABS around the crack.

And a quick clamp to keep everything held together.

The clamp can come off after a few hours, and after the acetone has a day or so to evaporate, the joint will be as good as new.