Using DAC on smoothieboard

hariantos_SW · February 5, 2015, 6:53am

Hi everyone,

From what I’ve understood so far, there’s only one DAC pin on the Smoothieboard (LPC1769). I’ve seen people making a laser_dac branch, so I am more or less aware of the people working with the DAC.

However, what if I want to use the DAC function for something else? I want to configure the DAC values as well of course, but where can I find this in the firmware?

I’d appreciate all the comments/helps! Thanks a lot in advance.

Cheers!

Imported from wikidot

hariantos_SW · February 5, 2015, 7:10am

By the way, I want to use pin 0.26 AOUT, not the PWM analog output from P2.0-P2.5.

Thanks again!

Arthur_Wolf · February 5, 2015, 4:34pm

Hey.

What do you want to use the DAC for exactly ?

Cheers

hariantos_SW · February 9, 2015, 10:55am

Hi arthurwolf,

Thanks for replying! I want to use the DAC to control a laser driver/PSU that only takes analog signal 0-5V (not PWM). The amplitude of the voltage will be translated into intensity of the laser.

PS: The laser will not be used for laser cutting, but for 3D printing.

Cheers

Arthur_Wolf · June 21, 2015, 2:27pm

Hey.

If you want to use the DAC for 3D printing, it still sounds like you want to use the laser module.
Did you try the laser_dac branch ?

Cheers.