New Jarduino build gets started

reefme · #1 06-09-2013, 10:37 PM

Ya, but you have to look into the sketch to make sure it's assign to that pin.

daplatapus · #2 06-09-2013, 11:08 PM

Oh, that, lol, ya I did. I have a feeling it's not a sketch related problem.
The lines I found in the sketch that I think do what I'm wanting are:
const int HoodFansPWM = 44; //PWM Hood Heatsink Fan (code added so frequency = 25kHz)
const int HoodFansTranzPin = 47; //Hood Heatsink Fan on/off

This would leave me believe the arduino pins would be 44 and 47, not 45 and 48 as per the diagram previously referred to.

I have a feeling it's a wiring issue. That's why I was hoping to figure out if I should be able to read certain V's at specific places to be able to troubleshoot the circuit.

daplatapus · #3 06-11-2013, 03:04 AM

Woohoo, got the fans working!

StirCrazy · #4 06-11-2013, 04:43 AM

get some potting compound (clear) and fill in the holl around your heat sensor

Steve

daplatapus · #5 06-12-2013, 09:10 PM

Cool, thanks for the suggestion.
I've fired everything up and leaving it go for the day. I tried adjusting the fan on temps and the fans shut off even though the heatsink was warmer than the set temp. Turned the set temp back down and they come on again. They also seem to be going fairly slow.. not sure if there's a setting in the sketch that can speed them up or what?

daplatapus · #6 06-13-2013, 12:21 AM

Hmmm, unplugged the PWM fan wire and the fans ramped up to where I think they should be. Anyone hazard a guess what might be wrong? Where I should start looking?

ScubaSteve · #7 06-13-2013, 12:37 AM

Quote:

Originally Posted by daplatapus

Hmmm, unplugged the PWM fan wire and the fans ramped up to where I think they should be. Anyone hazard a guess what might be wrong? Where I should start looking?

I'd start by poking around with your multimeter. Check the PWM pin to see what the output is and make sure you haven't accidentally reversed the ground and PWM wires, then start checking each part of your fan circuit. If I remember that crazy-assed circuit correctly, there is a chance the transistors aren't saturated and thus aren't acting like switches as they were intended to.

Also, check the programming to see what the minimum and maximum PWM outputs are. Most fans will struggle to operate properly once the PWM drops below a certain duty%.

Finally, make sure your controller and fan circuit are sharing the same ground (not just plugged into the same circuit but literally have their ground planes connected). If they aren't I can almost guarantee that's the problem.