Need Help!- Matter of great importance (to me=) Haas VMC Servo Replacement

[Asmordo]

Someone asked me if the attached servo motor, supposedly from a Haas VMC could be replaced with a SGM-08A312 Yasukawa servo that I own.

Since I'm unable to find any documents or explanations for the model number SGM-08U2HA12 on the Haas motor, I wonder if there is anyone here who know anything about this? It would mean a great deal if someone could help me.

It's just speculations based on what I have read on the zone, but I bet that this AC servo either may be a special make from Haas, or that Yasukawa since long has stopped pruduction of it. All the specs seem to match except for the model number and maybe the encoder. If the encoder is different it would not work with the old drive will it?

I have asked the person in question to check if he can find any driver model number, but as of yet he has not provided me with any. If he finds it I will post it here though.

I would be very glad if someone could even provide me with a meaning of the end of the modelnumber "******U2HA12"

Thanks!!!

[BobWarfield]

Which mill and which axis is it from?

Whether or not the other servo's encoders match, you should be able to swap in an encoder that would. If the Haas servo is dead, you can disassemble it to see what kind of encoder is back there and what it will cost to get another.

Cheers,

BW

[Asmordo]

Thanks for your help! I've read quite a lot of your informative posts. I really appreciate you taking the time answering my post.

I have not yet had the chance to ask him what Haas model it's on, and what axis would also be a good question. I'm still wating for him to reply on my last mail though.

I just don't want him to get a servo that he can't use. The possibility to change the encoder would exist for him, but I get the feeling he's not willing nor able to do so. If it were mine I would definetly concider it though. I will give him you advice, even if he already has bought the "replacement" from me. The funny thing is that he asked if it would work as a replacement after he paid for it...

It would be nice to know if there is any way it would work as a direct replacement or not. (I bet not though) To bad I can't find any info on the Servo he sent a picture on. (in the first post) If I know it will not work, then I can inform him, and both me and him will be able to sleep better. =)

I was actually going to use this servo for a homemade 4th axis since I have 2 compatible drivers, but since I got a nice offer on it I could not resist. But maybe it was not worth the trouble.

Thanks again for taking the time to help me! =)

[mcphill]

I am of the understanding that Yaskawa servos are somewhat "proprietary". While many other manufacturer servos and drivers are interchangeable with each other, Yaskawa normally must be a matched set of parts from Yaskawa on both sides. Now if Haas actually sourced their parts from Yaskawa and rebranded them, then you could have a good likelyhood of being in business with a Yaskawa branded servo. If not, though, I would hedge my bets and say you are not in a "like for like" replacement situation...

[Asmordo]

Thanks mcphill!
I was thinking a bit around those lines my selfe. I was not aware that Yasukawa was as strict with "like for like" as it seems Mitsubishi seems to be.

I'm more and more leaning towards advising him against buying the servo from me, and to try to find the same model, or as BobWarfield suggested; to try to repairing it. It would probably be cheapest to repair it if possible. At least if only the encoder broke. But maybe it died of physical breakdown. From the looks of it I find it quite likely
Not that that's a bad thing though. Machines should be loved to death, with work.

[PTS]

I had the Kitamura K1, I could not reset the alram #99, 101 P/S alarm.
please help!!!!!!!!!!

PTS

[mactec54]

Asmordo

You don't have to worry about the motor being rebranded, Haas uses Yaskawa motors
In your case the motor that you have the U is for the voltage the 2 is for the Encoder
which in your case is not the standard encoder the standard encoder is 2048 count I think the Haas machines are/were using 3000 count encoder, But may not be on the older machines, they may have the 2048 encoder on them

if the encoder is not dead on the servo you took off the machine then you could or get somebody to change them for you & you would be good to go

This encoder only needs to be changed if it is not the same as the other motor you have which has a 2048 encoder on it

What drives are on this machine if they are the Yaskawa drives then you can set the drive for different encoders this may work as well

[Asmordo]

mactec54, thank you for your reply! =)

This is actually not my motor we are talking about. My motor is the one with the standard 2048 encoder (SGM-08A312). The owner in question is telling me that:
"We use the 4 th axis in which the mentioned servo is fitted and the model no. is HRT 210 and work along with HAAS VMC model no. VF 1 and VF 2,"
If that helps anyone to know what driver is inside them. (I did actually ask him to check inside to see if he could see the model number on the driver. Maybe it was not possible to do so?)
I have asked him to take a look again, along with all the advice I got here.

So you are saying that even if the model number says SGM-08U2** it could still be a 2048 count encoder if it's old? Is there any clear date of manufaturing that you could go on to determine that maybe?

So the voltage part of the model number is the same it seems. But the encoder is not the same. HA12 could that then indicate the sort of shaft that is on the motor or so!?
I did find something about the U in the model number. It seems that those with U is UL-Approved, what ever that means. And mine is standard. Also the one with a V is TUV-Approved. Maybe this will help someone.

In any case, well see what he says in his next message.

Thanks again!

[Asmordo]

PTS
I'm afraid I can't help you with your question.
This forum is for things concerning Haas Mills.
As far as I can tell, Kitamura is not a Haas. You should probably rethink where to place your post. You will also get more answers if you do.

[Asmordo]

Ok, the buyer has said that the encoder is fine, and that he will attempt to switch encoder on my servo. I hope it works for him.

Thanks everyone who helped out on this. If he tells me how it goes, I'll be sure to forward it here.
=)

[mactec54]

Hi Asmordo

If this is for a the 4 axes then he could use it like it is, He would need to make changes in the machine control if he does not change it.

& no the # 2 means that it has a 8192 PPR incremental encoder #3 is a PPR 2048 incremental encoder

The only thing I see is this #2 8192 encoder was not on those motors as the norm for a SGM, they were on the SGMG, so that is the reason for not much information on that #2 encoder for that motor

[Asmordo]

Yes, both of them seem to have 4 axis drivers. I guess you have to adjust the parameters on both of them. I hope it works for him.
If they were not normaly used, then I guess it makes sense that they don't write it in manuals. Would have been nice to be able to just look in a SGM manual to find the information though. Thank you for your help, mactec54! =)