PWM Fuel labs Prodigy questions
Posted: Mon Apr 03, 2017 12:24 am
I had a couple of easy questions for the pros.
Current set up
Scal 2.15.9
Firmware 174.2
S6 with exp I/O
I have installed a Prodigy Pump and would like to run PWM to control the pump for prime and ramp up with rpm and boost, still running a return reg.
Manual for the pump states
500hz-1500hz
PWM pull to ground
0-20% duty pump is off
20-90% pump is variable speed min-max
90%-100% is maximum
My settings
Fuel12 output wired to PWM signal of pump
Relay to turn on pump with key
Prime time 5s
PWM control Enabled
Output drive type = Low side
PWM frequency = 500hz
Off duty= 89% ( pump turns off after prime time, at 90% it cycles every 1 second)
Priming duty=80% (pump does prime at lower speed)
Run duty=50% ( starting car the pump does turn on but low speed, kinda high pitch sound)
My question is This seems backwards from the manual. I tried to set the off duty to 20 but the pump speeds up. It appears it is reverse of the manual.
Am I missing something really simple?
Current set up
Scal 2.15.9
Firmware 174.2
S6 with exp I/O
I have installed a Prodigy Pump and would like to run PWM to control the pump for prime and ramp up with rpm and boost, still running a return reg.
Manual for the pump states
500hz-1500hz
PWM pull to ground
0-20% duty pump is off
20-90% pump is variable speed min-max
90%-100% is maximum
My settings
Fuel12 output wired to PWM signal of pump
Relay to turn on pump with key
Prime time 5s
PWM control Enabled
Output drive type = Low side
PWM frequency = 500hz
Off duty= 89% ( pump turns off after prime time, at 90% it cycles every 1 second)
Priming duty=80% (pump does prime at lower speed)
Run duty=50% ( starting car the pump does turn on but low speed, kinda high pitch sound)
My question is This seems backwards from the manual. I tried to set the off duty to 20 but the pump speeds up. It appears it is reverse of the manual.
Am I missing something really simple?