g320's and a humming servo...

[h_2_o]

If someone can help me out with this it would be appreciated. I have the g320's hooked up correctly, however i am having a problem getting the motor to do anything at all. I get the flutter/humming thing going on but nothing else. I have the settings set at this
Tun DAMP and GAIN to the 10 'clock position (8 'oclock = fully CCW, 4 'oclock = fully CW). Turn LIMIT fully CW.

and still nothing but the fluttering/humming sound.

anyone have any idea what might be going on with this?

thanks

[mlaws1172]

Is the servo locking up so that you can't turn it with your fingers?
mike

[h_2_o]

correct, it seems to be fluttering between 2 encoder points creating the humming sound. at least that is what i think it is doing. anyway yes it is locking up.

[Al_The_Man]

Is the encoder phasing correct for correct direction? One way to check is to swap the A & /A if differential encoder or the A & B if single ended.
Al.

[h_2_o]

al i have a, a-, b, b-, z, z-, +5, and grd. I was guessing that the a, b connections should be used. are you saying that i should try the a-, and b- connections and if those do not work swap a,b connections to the drive to see if it works then?

thanks

[Al_The_Man]

If you have differential encoder, which you appear to have, a direction change can be done with a swap of A & /A, I am not familiar with Gecko they may have an alternative method, but this should work with all applications, where the direction phasing is wrong.
Al.

[ViperTX]

Al...you may hit the nail on the head....I don't believe that Gecko accepts Differential Inputs.....you have to have a Gecko adapter to convert the differential to single ended.

[Al_The_Man]

In most case the if a system only uses single ended, then with a differential encoder output, the A, B & Z can usually be used WRT to common and the Complements left un-connected.
In this case then the A & B would be swapped to reverse the phasing/direction.
Al.

[mlaws1172]

I would look at the computer and make sure you it is putting out a signal telling the motor to move. sounds like the gecko is working.

Seeing how you have differential encoders , i would add some recievers and use them.
mike

[Al_The_Man]

Originally Posted by mlaws1172 Seeing how you have differential encoders , i would add some recievers and use them. mike

According to the specs, don't gecko g320 take differential encoder?
Al.

[mlaws1172]

no they are set up for single ened. one thing to watch for with the encoder you are useing is what they draw for amps. Gecko is good for 50 ma.

but if the servo is locking up then it is seeing the encoder. for it to move it has to see a dir. and sterp signal
mike

[mlaws1172]

what brand of encoder are you using?
mike