I
Ignoramus8946
- Jan 1, 1970
- 0
I have an SCR firing board controlled with 0-5V potentiometer input
and separately a microcontroller. This microcontroller can output
0-5v.
I have a dilemma. I can either:
1) Let the pots control SCR firing board output, and let the
microcontroller simply turn it on and off
2) Let the PWM outputs (filtered to DC) control the SCR firing board.
Which is best? In the long run, 2 is more versatile and could allow me
to do fun stuff like TIG pulsing, "Lift Arc" starts without high
frequency, etc, with just some BASIC programming.
On the other hand, it is a little more dangerous if I make a mistake
in code (which sometimes happens .
A common sense approach would be to wire the board so that I have two
sets of outputs, PWM and pots, and connect SCR firing board to pots
first. When I get some tig welds done, etc, I could experiment further
with PWM control of the board.
What am I afraid of? That I make a mistake and programming and somehow
the welder would go very crazy.
Is what I am saying, making any sense? Any words of wisdom?
i
and separately a microcontroller. This microcontroller can output
0-5v.
I have a dilemma. I can either:
1) Let the pots control SCR firing board output, and let the
microcontroller simply turn it on and off
2) Let the PWM outputs (filtered to DC) control the SCR firing board.
Which is best? In the long run, 2 is more versatile and could allow me
to do fun stuff like TIG pulsing, "Lift Arc" starts without high
frequency, etc, with just some BASIC programming.
On the other hand, it is a little more dangerous if I make a mistake
in code (which sometimes happens .
A common sense approach would be to wire the board so that I have two
sets of outputs, PWM and pots, and connect SCR firing board to pots
first. When I get some tig welds done, etc, I could experiment further
with PWM control of the board.
What am I afraid of? That I make a mistake and programming and somehow
the welder would go very crazy.
Is what I am saying, making any sense? Any words of wisdom?
i