Hi to everyone, i’m working in a project that consists in building a motion system, and it uses 6 linear actuators. So i bought 6 futaba s148 servos and the ems linear kit (to change the motion to linear), i’ve modified the servos and now i’m proving with the ssc-32. The thing is that when i use independently each servo works ok, but when i send group motion commands always there are 2 or more servos that buzz. First i tought that was a power supply problem, but i’m using a lab power source and the problem remains, please anyone can help me?
Remove the VS1 = VL jumper and install the 9vdc battery clip to power the logic separately from the servos. Even though you are using a lab power supply there is the possibility that the wires you are using are too small, or there are poor connections. If you make this change and it does not fix it, at least you can eliminate the power supply from the possibilities.
You say they are buzzing. Are they working otherwise? Moving to position etc?
Thanks for the reply, i’ve just tried this, i’m using the 9v battery for the Vl and the lab power supply for the servos, but still remains the problem. The only time that the group movement works fine is with the all 1500 command in the sequencer, any other way there is always buzzing servos.
The servos move in the way is expected, the problem is that when they reach the final position, some of them are buzzing.
Is the green LED on the SSC-32 out, and only blinking when you are sending commands?
Also, are you sure the liner kits were installed correctly? The SSC-32 is just sending simple pulses to the servos. It’s a real stretch to think it’s causing servo buzzing. If the linear kits were installed incorrectly you could be locking the output shafts.
It blinks when i send commands, but now i’ve seen that also blinks when i’m writing the commands in the lynx ssc32 terminal, it blinks every time i pulse a character in the keyboard, is it normal?
One other thing, the SSC-32 can position the servos output shaft beyond 180° of range. It’s possible the linear kits are not designed to move this much. Try to reduce the travel on the moves.
Yes. This is fine.
About the travel, i’m moving just from 1000 to 2000 microseconds, but the servos buzz sometimes when i move to 1100, or to 1800 or any other travel between this range.
this really just sounds like the servo is holding a load, or there is friction or binding in your slide mechanism preventing it from getting to the desired position smoothly. just a thought… you are saying “buzz” which suggests a low frequency angry kind of noise. Is this what you are hearing or is it more like a “whine” or “hum”… frequency being a few khz, dog looks at you funny, type noise? Also if you add or remove load to the servos when they are making the noise does it change in pitch or go away?
Actually i’m working without load, there is nothing connected to the servos, i’m just make them move to verify that will work right together.
And about the sound, is a low noise but when i hold the servo it has a little vibration.
This lab power supply AC or DC? lol I’m not sure what to tell you to try. Maybe a video would help.
It is a dc power supply, i’m working with 6v.
Check it with a scope for 60hz ripple.
Thanks for your help, finally it was a mechanical problem (the linear kit needed a little of lubricant).