B and L look like an output from the drive and an input to the 
controller, but the description makes it sound like contacts that enable 
the drive.  I would recommend taking an open circuit voltage reading 
between B and L and putting a relay coil rated for that voltage.  It 
could be an output that shorting could damage.  Other than that I think 
you have it pretty much figured out.

Roger Neal


----- Original Message ----- 
From: "Kirk Wallace" <[EMAIL PROTECTED]>
To: "Enhanced Machine Controller (EMC)" 
<[email protected]>
Sent: Monday, March 03, 2008 3:43 PM
Subject: [Emc-users] Hardinge Lathe Spindle


>I am trying to interpret this drawing in relation to the DC spindle
> drive in the center of the drawing.
>
> http://www.janick.com/cnc/print3.jpg
>
> It seems clear that A and D are intended to be shorted to ground to
> enable the drive.
>
> A is labeled Inhibitdly, so I supposed there is some sort of delay
> feature involved. How is this intended to be used?
>
> B and L aren't labeled, I assume for testing these can be shorted? I
> wonder how this was intended to be used.
>
> Since there is an opamp symbol on H and J, I assume a plus or minus 10
> Volts on H relative to J will command a forward or reverse output?
>
> Does anyone have experience and advise on using this spindle drive 
> with
> EMC?
>
> Thanks.
> -- 
> Kirk Wallace (California, USA
> http://www.wallacecompany.com/machine_shop/
> Hardinge HNC lathe,
> Bridgeport mill conversion, doing XY now,
> Zubal lathe conversion pending)
>
>
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