Hello,
I have a 24V Brushless Planetary Gearbox Motor with an integrated controller. It has 5 lines: +|-|PWM|direction|FG]. The PWM control allows for 10%(0V)-100%(5V) Motor speed.
Now I am looking for a way to make the Motor a) disconnect to allow pushing my robot around and b) stop/brake. The only way to stop/brake the motor is by connecting the PWM line to the Motor GND line (-).
I am not very familiar with electronic switches. I believe a) can easily be solved with just a MOSFET switch like this one. But for b) I need something like an electrical switch which switches the PWM line between Arduino and GND based on another Arduino output line. Do I need a relay like this or what kind of part can I use for this task? I want it to react as quickly as possible and preferable have no internal resistance, so I can accurately transmit the PWM signal without voltage loss.
Best regards
Hi,
Can you post a picture showing your current setup ? Where is your PWM coming from ? Also, we assume that you are looking into a wireless switch to break the gearmotor since the robot would be in motion when you want to break ?
The PWM is generated with an Arduino. I made a photo of a simplified setup.
Yellow is FG (Pin 2), Blue is PWM (Pin 9), White is Direction (Pin 10), Red and Black are 24V +/-. When I connect the power source (red and black wires), the motor is always spinning (0V PWM is 10% Motor Speed, 5V is 100%). To brake with the motor, the blue line has to directly connect to the black line and disconnect from the Arduino. Now I am searching for an electronic switch which allows me to do that. I want to control it with the Arduino aswell, for example with Pin 11. I also want to be able to fully disconnect the motor from the power with another switch controlled by the Arduino, say Pin 12.
What kind of switches can I buy for this?
Best regards
From what we can see online:
Note that you need to have a common ground (which it does not appear to be the case), and they indicate 6 - PWM governor in addition to one foot must be connected to a separate power supply 0-5V + pole (whatever that means).
It’s not a motor we offer so can’t really provide much support. Perhaps someone from the community can offer additional insight.
We have a similar product, but note that the wiring may be different:
robotshop.com/en/12v-159rpm- … RB-Dfr-651
robotshop.com/media/files/im … xample.png
