robottini/grbl-servo

Servo motor Arduino

SANTILIZER opened this issue · 8 comments

SANTILIZER commented

Hello every one I am new to Arduino and I am facing the following problem,
I have a problem with one of my servo motor (mg996R) it has the following Problems :
1- It is very shaky when I fix it to a certain angle for example if i tell it to go to angle 110 it will go there but it cant stand still
2- After a certain time around 10 to 20 second (not always fixed time it can be below or above) it neglects all orders and starts moving on its own trying to break it is limited movement . meaning that if the motor is set on 110 angle suddenly it will start spinning to reach 0 angle and keeps the spinning although it cant go beyond that ( even manually ) . Uploading a new Arduino code will not fix it nor cutting the power supply for the servos (it will start spinning once the power is back), it can only be fixed by cutting the supply for the servos then upload a new code to the Arduino.
I wish to know what is the cause if this issue because I cant find a solution to it any where ( and I did glue it to my intended part so simply changing it is quiet hard)

robottini commented

Hi, I don't know how you provide the power to the servo. You can't power the servo from the Arduino. You have to provide the power supply externally from the Arduino, Very important is wire the external power supply GND with the Arduino GND.

SANTILIZER commented

Hi thanks for replying , And yes the servos are powered externally by a 5v dc supply connected to the breadboard

robottini commented

Hi, usually the 90% of the problems with the erratic servo is a power supply problem. Can you post the specs of your power supply and a picture of the wiring between the power supply, the servo and the arduino?

overland41 commented

good morning I had already written but perhaps I didn't see the answer I built one of the plotters on thingiverse and I installed the GRBL robots downloaded here on Arduino Uno and CNC Shield V3, the axes move and the machine works but the servo motor doesn't move neither with a g code file nor by typing on ugs M3 S90 OR M5
TO GIVE AN ORDER TO LOWER OR RAISE, THE SERVO TENDS TO HEAT A LOT AND THEN IT'S AS IF IT NO LONGER WORKS THE SERVO IS AN SG90 AND IS FREE FROM OBSTACLES AND THE UGS 2.1.8 VERSION FOR 64 BIT, I try a lot I change the servo etc but nothing, I connect the servo with the red 5V wire, the brown GND and the yellow Z+, however it doesn't make any movement but it heats up a lot, perhaps GRBL is not compatible with Windows 11 64 bit, can you tell me if there is a solution, thanks
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overland41 commented

The whole machine is powered by a AC 100-240V 50-60Hz 0.3A output 2A power supply

robottini commented

Hi, It seems you power the servo in a correct way. Sorry, I can't help you

overland41 commented