Schaublin 125-CNC retrofit.

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22 Feb 2021 13:32 - 22 Feb 2021 13:33 #199704 by RotarySMP
Good questions thanks. The only information in the manuals is that they are permanent magnet servos. I find it difficult to beleive that a company like that would confuse resolvers for tachos or encoders. Especially as the same wiring diagram includes the Heidenhain encoder for the main spindle.


This is the view up under the lid of the Z axis motor.
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Last edit: 22 Feb 2021 13:33 by RotarySMP.

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22 Feb 2021 14:12 #199705 by db1981
Replied by db1981 on topic Schaublin 125-CNC retrofit.
that's an old kearfott singer resolver.....
then 1 wire is shared with one of the motor wires.

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22 Feb 2021 14:13 #199706 by Aciera
Replied by Aciera on topic Schaublin 125-CNC retrofit.
Judging from your photo I would say it's the same as these (Resolvers off of an ebay sale):

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22 Feb 2021 14:17 #199707 by db1981
Replied by db1981 on topic Schaublin 125-CNC retrofit.
take a look at the granity argon drives. they are able to control brushed and brushless dc with resolvers. And have the advantage of direct 230V AC Power input.
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22 Feb 2021 14:38 #199711 by RotarySMP
Hmmm, that is a tasty solution. Keep the motor and their cables, but only need two drivers the size of paperbacks powered by single phase AC. They are pretty pricey, at €500 including VAT, but would save me a bunch of time mucking around with mounting replacement motors. WIth a hobby, is time save = money a thing?
Mrk

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22 Feb 2021 14:55 #199714 by db1981
Replied by db1981 on topic Schaublin 125-CNC retrofit.
hmm, i'm not shure if this resolver will work with todays servo drives.
There is less information in the web about this types. in other boards is written that this old ones have 2 input coils and one output coil, and were driven with an sin and cos signal.

todays resolvers have only on input, and coils for sin/cos output.
don't know if they could be driven backwards, I'm not old enough for such electro/magnetics stuff :-)
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22 Feb 2021 15:09 - 22 Feb 2021 15:21 #199716 by Aciera
Replied by Aciera on topic Schaublin 125-CNC retrofit.
You might actually want to inquire whether the 7i49 can actually handle this kind of "3-phase" resolver.

[edit]
I guess the proper term is "synchro resolver" or just "synchro"
Last edit: 22 Feb 2021 15:21 by Aciera.

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22 Feb 2021 17:47 #199737 by tommylight
I have used Argon drives on a Hurco retrofit, but not sure they had resolver support. It is mentioned that they will in the future, although all that is a bit foggy by now since that was several years back.
They are nice drives, but do have a very irritating issue, namely they use RS485 at very high speeds to program the drives and that link fails as soon as you enable the drive, so use shielded RJ45/STP cable, otherwise ..... :)
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22 Feb 2021 20:34 #199763 by RotarySMP
They offer this widget to support resolvers.
store.granitedevices.com/argonaccessories/13-gdares.html
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23 Feb 2021 07:36 - 23 Feb 2021 07:52 #199800 by Aciera
Replied by Aciera on topic Schaublin 125-CNC retrofit.
Hm. But how are you going to connect your synchros to that?

[edit]
Maybe I'm barking up the wrong tree but your synchro seems to have 3phases at 120° and a "standard" resolver has 2 phases at 90°

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Last edit: 23 Feb 2021 07:52 by Aciera.
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