ToM Transistor based Extruder “Relay Fixâ€
by merlinjim, published
Description
Recent Comments
view all
Finally were able to finish this board and it's ugly as hell :)
Initial tests show it works, although when the control current is 0V the output current reads 2-3V.
I haven't installed this yet but I'm guessing the extruder motor doesn't care.
Of course. I don't have the parts yet and I'm little short on time but this is on my to-do list.
let me (and M_G) know if it works - neither of us has tried it out yet!
Makes
Remixed From
Tags
License
Give a Shout Out
Instructions
Comments
You must be logged in to post a comment.
I bought a thingomatic early on and I don't know what this is for. Could you explain what problem this fixes? Do I need it if my printer prints fine?
It gets rid of the relays. Among other things, this will give you more precise temperature control on your heated build plate. If you're using a relay to power the heated nozzle, you can switch to this too for the same results. It will potentially protect your extruder controller - I've had one burn out the heater pins from a short. The best part, though, is your makerbot will stop clicking like an oven lol.
What ohm values do the resistors have?
Finally were able to finish this board and it's ugly as hell :)
Initial tests show it works, although when the control current is 0V the output current reads 2-3V.
I haven't installed this yet but I'm guessing the extruder motor doesn't care.
Doesn't really matter... the input pin on the transistor is high bias, meaning it takes very little current to turn it on. I'd start around 1k and see how that works.