GD Servo Drive user experiences

[pacosoide]

So what is the price is US dollars for the drive, plus shipping?
Thanks, Joe.

[Xerxes]

Originally Posted by pacosoide So what is the price is US dollars for the drive, plus shipping? Thanks, Joe.

The intro price is 150 EUR, few drives are left for that price. Price after introduction is still undetermined (first we need a new quote from our contract manucacturer).

Shipping cost to US is typically 40 EUR as insured priority package.

[BALLSCREWPRO]

Hi, Xerxes,
I received my drives a couple of months back and have yet to hook it up.
Have some high Horse Power Emerson AC servo motor ranging from 600W to 3000W.
Going to use one of the model DXM340WB 1060W, 240V 3Krpm, continuous curent 6A, Peak 14A But it comes with brushless resolver.
Any way of converting the resolver signals to incremental signals or remove the resolver and install incremental encorder.
Regards

[Xerxes]

There are some resolver-to-encoder IC chips if you want to build a converter circuit. However,it might be easier to replace the resolver with an encoder. Encoder is also more accurate.

[BALLSCREWPRO]

Originally Posted by Xerxes There are some resolver-to-encoder IC chips if you want to build a converter circuit. However,it might be easier to replace the resolver with an encoder. Encoder is also more accurate.

Hi, Xerxes thanks for the reply, Can you recommend some IC chips for making the circuit converter. Thanks

[Xerxes]

Hi,
At least Analog Devices makes such chips. See the chips with encoder simulation:
http://www.analog.com/en/subCat/0,28...0%255F,00.html

I haven't tried any of them though.

[mjs79]

i got my 3 drives , breakout board and servo yesterday .the drives look very well built , also well packaged .i have to say that granite devices has top level customer service , hats off to you .
i will let everyone know how everything works out for me in the coming weeks .
thanks again tero for everything .

cheers
mike

[Oleks]

Hi Tero
Not sure if here right thread for this questions but anyway..:

1. New tuning soft has 15A peak & 12 A cont. current limits. Will that work with my Rev.1 drivers too?

2. I plan to use motors with gears. Backlash in "encoder to linear (gantry)move" mechanics can cause unstable state. Did you ever try to tune the driver with "backlashed load" and may be can suggest what max backlash for gearbox is still OK? For my application hope 25 arcminits. backlash will be not too bad accuracy (about 0,1mm). I've dug lots of sites with gears. Only now I realized how high price low backlash has...

3. You have nice motors for sale now. May be your motors supplier can also find matched gearboxes say 1:7, 1:10, one stage, good price? I think many applications (your customers) require motor's speed reduction. Or may be th supplier have low speed motors as well and 1:3,6 (biggest practically available with1 stage) beltdrive can be used?
After hours spent on eBay learned that it's not good place for someone who several same motors needs. May be anybody else here know a place with nice Chinese gearboxes?

[Xerxes]

Oleks,

1. Yes, same current ratings apply for Rev1 and 2.

2. Some backlash is tolerable in transmission from motor to load (the less backlash, the better performance you get). However, encoder should be mounted directly to motor shaft and must not have any backlash to get good stability.

3. The motor supplier seems to offer also small DC-motors with gearboxes, but those are not servomotors.

[iyerks]

Dear Tero

We bought 2 drives about 10 months back - but we could not get the drives working with 2 different motors types we had with us - since we were looking at a quick plug-n-play solution which did not happen, we did not take this further and condemned it as a failed experiment.

Seeing the posts here gives me confidence that we should take another crack at this - Tero, maybe you should be in touch with Vaidi ( vaidigermany@gmail.com ) again on this.

[Xerxes]

Originally Posted by iyerks Dear Tero We bought 2 drives about 10 months back - but we could not get the drives working with 2 different motors types we had with us - since we were looking at a quick plug-n-play solution which did not happen, we did not take this further and condemned it as a failed experiment. Seeing the posts here gives me confidence that we should take another crack at this - Tero, maybe you should be in touch with Vaidi ( vaidigermany@gmail.com ) again on this.

Please describe your observations/attempts in more detail so I can help you. Our best interest is to have 100% working drives on every customer.