want to run the two servo motor using nrf52832

RE: want to run the two servo motor using nrf52832

haakonsh — Wed, 18 Mar 2020 16:16:21 GMT

So what kind of signal are you supposed to capture on the 4th wire?

RE: want to run the two servo motor using nrf52832

ps_anu — Wed, 18 Mar 2020 12:32:39 GMT

4 pins

RE: want to run the two servo motor using nrf52832

haakonsh — Wed, 18 Mar 2020 09:18:14 GMT

Those two links show pictures of two different devices with the same product name, which version do you have, 3-pin or 4-pin?

RE: want to run the two servo motor using nrf52832

ps_anu — Tue, 17 Mar 2020 05:26:00 GMT

Sure , it has encoder too .. No datasheet is available for this motor . Reference link

https://www.robotshop.com/en/fr5311m-digital-servo-standard-continuous-rotation.html

https://electronics.stackexchange.com/questions/477394/calibrating-feetech-fr5311m-digital-servo

RE: want to run the two servo motor using nrf52832

haakonsh — Mon, 16 Mar 2020 12:56:19 GMT

Is that a continuous rotation servo or not, you need an encoder to find the angle of any continuous servo/motor.

Can you share the datasheet of your motor?

RE: want to run the two servo motor using nrf52832

ps_anu — Mon, 16 Mar 2020 10:22:27 GMT

servo motor..FR5311M .

RE: want to run the two servo motor using nrf52832

haakonsh — Mon, 16 Mar 2020 10:20:46 GMT

What kind of motor are you using?

RE: want to run the two servo motor using nrf52832

ps_anu — Tue, 10 Mar 2020 06:56:26 GMT

can you share some post related to that..timer based pwm .. i am finding very difficult to control the angle of the motor

RE: want to run the two servo motor using nrf52832

haakonsh — Wed, 04 Mar 2020 14:48:05 GMT

A TIMER based PWM, by connecting a TIMER's COMPARE event to a GPIOTE's OUT task, you can create a PWM. You can search Devzone for implementation details as this question has been asked lots of times.

app_pwm_channel_duty_set, the channel number is linked to a specific pin, each app_pwm instance can serve multiple outputs, given they share the same period.

RE: want to run the two servo motor using nrf52832

ps_anu — Wed, 04 Mar 2020 12:47:15 GMT

Timer in the sense ? what do you mean ..can you explain me clearly .. and one more (app_pwm_channel_duty_set ) in this function what is meant by channel ? what is difference between giving channel as 0 or 1 ..

RE: want to run the two servo motor using nrf52832

haakonsh — Wed, 04 Mar 2020 08:23:57 GMT

How accurate?

Or did you mean higher resolution? If so you need to use the PWM peripheral, or create one with a TIMER and GPIOTE.

RE: want to run the two servo motor using nrf52832

ps_anu — Tue, 03 Mar 2020 17:17:48 GMT

Yes I understood but I need accurate angle..

RE: want to run the two servo motor using nrf52832

haakonsh — Tue, 03 Mar 2020 12:55:50 GMT

That Is how you set the angle, you need to continuously vary the angle in order to control the speed.

RE: want to run the two servo motor using nrf52832

ps_anu — Tue, 03 Mar 2020 12:26:37 GMT

look , pwm_library example , i am using this function APP_ERROR_CHECK(app_pwm_channel_duty_set(&PWM1, 1, value) to vary the speed . Now my question how to control the angle of the motor ? i need to set the motor at varies degree

RE: want to run the two servo motor using nrf52832

haakonsh — Tue, 03 Mar 2020 12:18:59 GMT

What do you mean by "i tried with pwm_library i can able to control the speed only and not the angle ."? What observations have you made? Does the output of the PWM library not match what you'd expect, if so show us how it differs?