So I settled on using a AC air pump for my air assist. Anyone have recommendations on a switch I can can attach to the C3D board to toggle a AC component via gcode and how one would go about setting it up? Thanks much.

“Kelly S”

Ray Kholodovsky (Cohesion3D) December 20, 2016 17:33

Use an AC SSR and use the “extruder” MOSFET to control it. (The rightmost pair of the green terminals)

Antonio Garcia December 20, 2016 18:47

+Kelly S has to take some pictures of that machine, when you finish all your upgrades!!! I´m still waiting for my C3D, so i hope after Christmas i can start with those kind of upgrades :)

Kelly S December 20, 2016 19:04

+Antonio Garcia oh I will. :D

Ray Kholodovsky (Cohesion3D) December 20, 2016 19:05

FedEx came a bit earlier than expected. Only the 2 samples :) testing now. images/50a8c279ea07c661ce1752a0118ee06e.jpeg

Kelly S December 20, 2016 19:11

Awesome +Ray Kholodovskyay, look forward to your results so I can duplicate them in my build.

Don Kleinschnitz Jr. December 20, 2016 19:24

An SSR is the best choice but some AC devices will not work with a SSR. For example, my vacuum blower will not and I have no idea why but it will not run full speed with an SCR.

So I went with a 4x relay board with optically isolated inputs, electrically more noisy but I know it will work with all devices AC or DC.

An open collector/drain input to these boards allows multiple sources to turn on the relays at the same time such as smoothie and a control panel switch.

Check out my

http://donsthings.blogspot.com/2016/11/the-k40-total-conversion.html

…….for schematics and details.

amazon.com - Amazon.com: SainSmart 4-Channel Relay Module: Cell Phones & Accessories

Kelly S December 20, 2016 20:12

I looked but did not see exactly how you implemented the 4-Channel Relay Module

 am I blind?  :P +Don Kleinschnitz

Don Kleinschnitz Jr. December 21, 2016 01:30

+Kelly S its here in the schematics:

look at the “power Control” tab:

http://www.digikey.com/schemeit/project/k40-s-21-8SM4SO8200E0/

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