Circuit Printing Project

[jimustanguitar]

I got some pictures of the machine from the Structure 3D guys. It's quite simple. 

It's a NEMA17 stepper (you can kind of see the wires for it in the shadow behind the syringe) with a gear reduction box. On the printer end, they used "EDF" heads, which I think are disposable laboratory pipette tips...

You could build one for $40.

[BeeAmaker]

Yeah, but this will have to have the syringe on the platform. Imagine if that Nutella was silver nano paste. That would be a lot of wasted past left in that tube. You could store the entire tube and syringe to keep it from drying, but unless you used it all the time I think the tube would dry out quickly.

[jimustanguitar]

There'd be a lot less resistance to flowing if you took out the 2 foot tube in the middle. Plus, silver paste ought to be easier to push than Nutella. It took both of the guys at the booth all of the strength they had to depress the plunger enough to fit it in their machine.

[jimustanguitar]

Here's a solder paste extruder that's making the rounds in the online blogs...

3dprint.com/53642/solder-paste-extruder/

Still not effector mounted, though.

[BeeAmaker]

Still too big. I don't think they realize how much paste a syringe holds. The last time I used solder paste the Syringe was smaller than my pinky and I never used it all before it dried up.

[bvandiepenbos]

I have a machine to dispense paint for paint filling engraved letters. It is made by EFD. It uses a syringe and air/vac to control the flow. I will give you one of the syringes, piston and tip to play around with.
I can bring the machine next week if you want to see how it works.
It is a older model of this...
www.nordson.com/en-us/divisions/efd/solutions/electronics/pages/default.aspx

[jimustanguitar]

That's what the EFD heads are! I was scratching my head because I wasn't finding what I was looking for...

Cool!

[bvandiepenbos]

this is the unit I have
www.ebay.com/itm/EFD-Model-800V-Fluid-Dispenser-Vacuum-Model-/191545852804?pt=LH_DefaultDomain_0&hash=item2c9905c384