Making a fume extractor for ABS fumes for my RepRap

I made myself sick on accident from ABS fumes. I had set up a 120CFM computer case fan to blow the fumes out the window through a cardboard tube. I had changed my fan from 12v to 5v trying to stabilize the PSU voltage and shut that noisy fan up!

This backfired. As it now didn't vent enough and allowed ABS fumes to accumulate in the house.

So I made a better extractor that uses multiple fans running at 5v. This works quite well. I may re-make it yet, but time will tell.

In album

I am really hoping that the two pieces on the right are the same size. If I did my math right, the are.

I like how this is turning out! The left 2 are the same size and the right one is 3 inches shorter than the other two.

I was right! The two outside bits are the same size and the middle one is 3 inches shorter.

Fans go in the taller, narrower end and the far side, the short wide end gets jammed into the window.

A few of these ought to move some air.

It pulls air from around the printer to draw the ABS fumes out of the house.

The center bit is simply to keep the box from caving it. It’s made out of 1/16th inch plexi which would want to sag badly.

Gentle pulling of air around the parts.

Dang my work space is messy!

I think the new extractor looks a bit better than the old one did.


Plastic for my 3d printer, and how long it lasts.

The 3d printer kit I ordered can print several types of plastic. The 2 that are currently frequently used are ABS and PLA. PLA is a biodegradable plastic made from corn starch ( ABS is a plastic that is food safe and ok to use in aquariums and such. PLA is also food safe but being biodegradable I am unsure about its suitability in an aquarium.

Being that I have the laBOREtory I think it’s only suiting that I do an experiment. I’m going to test ABS and PLA with the liquids in the list below. I am unsure if I want to do this by printing small cups or by placing pieces of filaments in glass jars. Either way I’m going to test each of the following for compatibility with plastic and see how long it takes to dissolve.

  • coke
  • Mountain Dew
  • hot water
  • aceetone
  • isopropyl
  • salt water
  • sugar water
  • baking soda
  • bleach
  • lye
  • wd-40
  • milk
  • drain cleaner
  • gasoline
  • testors glue
  • lemon juice
  • Hydrogen Peroxide


I could just look up the solve the solvent had ability but that would be too easy.

What am I missing?.

3d printer ideas for custom aquaponics fittings

I am seriously excited about getting my 3d printer. It’s been a week since I ordered it, so 1-2 more weeks according to the confirmation email I got.

The printer can print in ABS. This can be a stinky plastic to print, but I’ve plans for making a fume hood for the printer that vents outside through the basement window. ABS is considered a food safe plastic, which means it should be safe to use in my aquariums.

I could do things like print out custom aquarium decorations, which I am likely to do. However, I am really excited about the prospects of printing out custom aquaponics fittings.

There are a couple of ‘fiddly¬†bits’ in aquaponics, such as the bell siphon. When they work, they work great, but they can be a serious PITA to get that stage. There are people who have done a lot of original research on how to make the siphons start and stop easier such as Affnan. However, he has access to parts I can’t get locally. Now I will be able to print them out for myself!

Another item I would be able to print would be a tipper. It’s best explained in the video here.

I can print out a tipper that is shaped exactly to the space that is needed to fit into the grow bed. If I need a long, narrow unit, I can print that, a short squat one, I can do that too.

I can print out meshed safety cages to keep baby fishes out of the siphons at will. No more needing to attack PVC with a drill to poor effect!

I am terribly excited about all of this..