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Author Topic: Gecko 320x  (Read 11671 times)

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Offline Robhi

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Gecko 320x
« on: May 08, 2013, 04:03:24 PM »
Hello every body,

I countered a problem as most of people on the web. I have wired my gecko 320x ( I guess correctly) as it mentioned in documents.
trimpot on 11 o'clock,  I have done all the steps and every thing was going fine, testing the encoder, is OK too, sending pulses is fine too, till I have wired the servo motor,

kl 34 180 72. the fault led remains red. I have a power supply of 72 volt, ( bought a kit ) with the encoders etc...so normally everything is compatible.

any help would be appreciated.

thanks in advance
Thanks Robhi
Re: Gecko 320x
« Reply #1 on: May 08, 2013, 04:59:04 PM »
Where do you have the current limit pot set?  One of the minor details Gecko has never bothered to document is that the current limit pot works backwards from the old G320, and normal convention - fully CCW is max current.  I set mine up like the previous G320s, and got nothing but faults.  Had to talk to two different people at Gecko before they told me that pot was bass-ackwards.

Regards,
Ray L.
Regards,
Ray L.

Offline Robhi

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Re: Gecko 320x
« Reply #2 on: May 08, 2013, 05:11:10 PM »
hi,
If you are talking about the limit trimpot, I have adjusted it as the P I D, at 11 o'clock, I tried at 10 o'clock but it is the same, always red fault red.
what do you mean by bass-ackwards? and how I could do the same as you?

thanks for your reply
Robhi
Re: Gecko 320x
« Reply #3 on: May 08, 2013, 09:14:33 PM »
Are Have you tried reversing the motor or encoder A/B wires?  If the motor is not in sync with the encoder, the Gecko will fault on power-up.  With all the pots at 10 o'clock, and no load on the motor, it should power up properly.  Do you have ERR/RES connected to ENC+?

Regards,
Ray L.
Regards,
Ray L.

Offline Robhi

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Re: Gecko 320x
« Reply #4 on: May 09, 2013, 12:36:22 AM »
hello,

yes I have tried to reversing A/B wires but not the motor as red wire of the motor goes to + and black one goes to G, am sure of that.
and the ERR/RES is always connected to ENC+.
I will try to put all the pots on 10 o'clock and let you know...
there is no load on the motor.

thanks a lot

Robhi
Re: Gecko 320x
« Reply #5 on: May 09, 2013, 12:46:06 AM »
What kind of encoders are you using?  G320X's don't really like USDigital Encoders - you must add pullup resistors on A/B, and disable encoder failure detection.  They work very well with CUI encoders.

Regards,
Ray L.
Regards,
Ray L.

Offline Robhi

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Re: Gecko 320x
« Reply #6 on: May 09, 2013, 02:51:47 AM »
hi,

yes it is, I use us digital, but what kind of resistor should I use? how many K?
thanks
Robhi
Re: Gecko 320x
« Reply #7 on: May 09, 2013, 03:28:38 AM »
Reverse the polarity on servo motors. Just try it. I fought that same problem for a week. You can't hurt anything by trying it.
Re: Gecko 320x
« Reply #8 on: May 09, 2013, 09:21:14 AM »
hi,

yes it is, I use us digital, but what kind of resistor should I use? how many K?
thanks
Robhi

I don't recall the details, but there is documentation on the Gecko site detailing exactly what's necessary to make USDigital encoders work with the G320X.  Personally I'd just ditch them, and get CUIs - they're under $30 each, and have selectable resolution.  Mounting is identical.

Regards,
Ray L.
Regards,
Ray L.
Re: Gecko 320x
« Reply #9 on: May 09, 2013, 09:33:41 AM »
hi,

yes it is, I use us digital, but what kind of resistor should I use? how many K?
thanks
Robhi

http://www.geckodrive.com/using-heds-encoders

Russ
 :)