Servo motor~~~~ problem~.....shaking problem!!!!! - Electronic Circuits Projects Diagrams Free

Gundam82 · 2nd October 2004, 07:34 PM

hey.... i doing five axis robotic arm.. i using 5 servo motor to control each of the axis ... to control all the 5 servo motor.. i using only one microcontroller. to control it...... as well...... my program can move the angle of the motor that i want then fixed there.....

my problem is... why while controlling.. the servo motor.... my servo motor sometimes will keep shaking.. there.... and .... sound like triggering..pth cases..... why ya??

pls pls pls help me.........!!!!!!

williB · 2nd October 2004, 08:26 PM

i would like very much to see it.
could you post a picture of it?

Gundam82 · 3rd October 2004, 02:56 AM

sure.. wiliB...... u know why the servo motor is keep shaking there and sometimes got sounds ~~ noise..... in the servo motor.. seems like triggering there..!!!!! is that possible becos of the period of the servo motor is sent?? cos i sending each pulse btween 7 to 8 ms only... !!!!!

williB · 3rd October 2004, 04:14 AM

cool ,,is that a vaccuum on there?

Gundam82 · 3rd October 2004, 04:20 AM

yayaya a vacuum place there..... wiliB .. u know why servo motor will keep shaking thr?? and keep triggering thr????

williB · 3rd October 2004, 04:27 AM

is that a cell phone on the table under there??
what is the robot supposed to do ?

williB · 3rd October 2004, 04:33 AM

Quote:

Originally Posted by Gundam82

yayaya a vacuum place there..... wiliB .. u know why servo motor will keep shaking thr?? and keep triggering thr????

i can only suggest that maybe the ( physical) load on the servo is too much..

Gundam82 · 3rd October 2004, 04:44 AM

hahaha..... yayay its a cell phone there...!!!!!
overload?? but.... it its not very heavy..... i sure it not overload!!!!! is it possible program problem??

bloody-orc · 3rd October 2004, 01:03 PM

how hewy is the arm? It might not be hewy for you but for the robot i could... i suggerst to use more powerfull servos (i think you use the most common ones(3kg\1cm) ) use like half stronger(6kg\1cm) this migt help. acctually change 2 or 3 servos closest to the robot.

Gundam82 · 4th October 2004, 10:38 AM

hey... erm... act my robotic arm not so heavy...!!! not more than 1kg.....
yaya i used the cheap one.. for the servo motor....1!! erm..~~other than change to (6kg/cm).. is that other solution??

erm.. one thing i want to ask is.... my servo controller.. i wrtie the program myself... then.. i write the program each time the pulse is around 9 -11 second..... for the period.... but from the information that i get all is 15- 20 second for each pulse/.... so any different???

bmcculla · 4th October 2004, 07:11 PM

I'd take the servo off the arm. If it still shakes its a software problem. Otherwise, as mentioned before, its probably the weight of the load that is causing it to shake and you'll need either stronger servoes or better control. Try using a trapaziodal tradjectory. This will speed up and slow down the servo in a more predictable way. You should be able to get info on trapazoidal tradjectories on Google.

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2nd October 2004, 07:34 PM	(permalink)
Gundam82	Servo motor~~~~ problem~.....shaking problem!!!!! hey.... i doing five axis robotic arm.. i using 5 servo motor to control each of the axis ... to control all the 5 servo motor.. i using only one microcontroller. to control it...... as well...... my program can move the angle of the motor that i want then fixed there..... my problem is... why while controlling.. the servo motor.... my servo motor sometimes will keep shaking.. there.... and .... sound like triggering..pth cases..... why ya?? pls pls pls help me.........!!!!!!

2nd October 2004, 08:26 PM	(permalink)
williB	i would like very much to see it. could you post a picture of it?

3rd October 2004, 04:14 AM	(permalink)
williB	cool ,,is that a vaccuum on there?

3rd October 2004, 04:20 AM	(permalink)
Gundam82	yayaya a vacuum place there..... wiliB .. u know why servo motor will keep shaking thr?? and keep triggering thr????

3rd October 2004, 04:27 AM	(permalink)
williB	is that a cell phone on the table under there?? what is the robot supposed to do ?

3rd October 2004, 04:44 AM	(permalink)
Gundam82	hahaha..... yayay its a cell phone there...!!!!! overload?? but.... it its not very heavy..... i sure it not overload!!!!! is it possible program problem??

3rd October 2004, 01:03 PM	(permalink)
bloody-orc	how hewy is the arm? It might not be hewy for you but for the robot i could... i suggerst to use more powerfull servos (i think you use the most common ones(3kg\1cm) ) use like half stronger(6kg\1cm) this migt help. acctually change 2 or 3 servos closest to the robot.

4th October 2004, 10:38 AM	(permalink)
Gundam82	hey... erm... act my robotic arm not so heavy...!!! not more than 1kg..... yaya i used the cheap one.. for the servo motor....1!! erm..~~other than change to (6kg/cm).. is that other solution?? erm.. one thing i want to ask is.... my servo controller.. i wrtie the program myself... then.. i write the program each time the pulse is around 9 -11 second..... for the period.... but from the information that i get all is 15- 20 second for each pulse/.... so any different???

4th October 2004, 07:11 PM	(permalink)
bmcculla	I'd take the servo off the arm. If it still shakes its a software problem. Otherwise, as mentioned before, its probably the weight of the load that is causing it to shake and you'll need either stronger servoes or better control. Try using a trapaziodal tradjectory. This will speed up and slow down the servo in a more predictable way. You should be able to get info on trapazoidal tradjectories on Google.