Im converting a Pfaff 130 Sewing Machine for sewing leather and heavy fabric.
I want to use a Makita drill for that.
I sorted out most of the mechanical problems - but I have questions about controlling the motor.
My idea is to keep the drill as a functional tool and connect a foot-pedal with a small connector and an arduino in between.
I added the datasheet of the drill-switch below.
No my questions:
I was expecting some kind of PWM-Signal from the switch.
It seems to me from the datasheet that I can use a potentiometer in my pedal to output 0,3 to 4,8 V - is that right?
I would like to use an arduino for better and adjustable control of of the pedal.
The data sheet would indicate that the output from the switch is an analog voltage not PWM.
It seems to me from the datasheet that I can use a potentiometer in my pedal to output 0,3 to 4,8 V - is that right?
I think you are correct.
I would like to use an arduino for better and adjustable control of of the pedal
You will need to use either an RC filter to convert the Arduino 0-5v pwm output to an analog voltage else use a DAC like the MCP4725 to output the voltage. The MCP4745 is a 12 bit i2c dac with good Arduino library support if needed.
Thanks for you answer and suggestions. I found additional information with this other forum:
The drill i have is equipped with a slightly differtent switch, more similar to the one in the forum above. The potentiometer seemed doable for me, but all the handshake fuzz seems like a mess to me and not worth the risk of bricking a battery.
This is my plan for now: Using a Makita Battery as powersource, but not the drill.
I will use a BL motor and a BL Motor Controller with a pedal-poti and the suggested MCP4725.
