Re: [CAD_CAM_EDM_DRO] Yaskawa Servo Pack/Motor compatibility

$450 for three axis? I think it's impossible..

But for one axis there are several possibilities..
- There several seller in eBay that sells motors plus encoder at around $150
each with gecko drive the price is still bellow $300 / axis, the power
requirement might fit..
- Buy from Taiwanese company, they can offer motor + drive at arround $450.

Regards,
Hartono

----- Original Message -----
From: "bitnick78" <arvidpublic@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Tuesday, March 09, 2004 3:23 AM
Subject: [CAD_CAM_EDM_DRO] Yaskawa Servo Pack/Motor compatibility


> I'm building a CNC router (hopefully also for milling aluminum; it's
> got THK guides and ballscrews etc).
>
> I have bought an SGM-02A3 Servo motor and a SGDE-02AS Servo Pack
> (both 200W, both used). Now it turns out these don't work together
> (the servo pack being a budget version which expects 1024 P/R from
> the motors, while the motor encoder is 2048 P/R). (The # or pulses
> has to be correct between motor and servo pack for the commutation to
> work on these 3-ph motors.)
>
> So, what do I do now? If the motor encoder signal had been a normal
> quadrature signal I could have built a divider circuit, but the C
> phase is very strange, probably something to allow the Servo Pack to
> know where the rotor is without having to look for the C pulse for a
> whole turn. Anyone's got the specifics on this signal for the Yaskawa
> motors?
>
> I can also buy a 400W version of the correct Servo Packs, which could
> *probably* work if I lower the torque limit to 50% (but I would lose
> the peak torque ability of the motors). Anyone knows if this would
> work?
>
> Or perhaps go with a different system altogether? But it has to be
> cheap, not more than $450 + shipping for motors and drivers for three
> axes. And the motors should be around 200W each.
>
> Thanks,
> Arvid
>
>
>
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