Re: Tree Mill Help

[Enrique Sanchez Vela <enrique_sanchez_vela-at-yahoo.com>]

the Servo Info I have is the following...

GOULD
Permanent Magnet Servo Motor.
CAT 16-0143-04
BACK EMF Ke 34.2 V/KRPM  TACH 9.5 V/krpm
Torque Constant 2.88 LB-IN/AMP
Rated Current Ic Stalled 12.5 AMP.


> 
>       We (me) will need a little bit more information about your Tree
> Mill.
> 
> 1.  What is the volts per thousand of your tachometers?  That
> information
> is usually printed or engraved somewhere on the tachs.  The tachs may
> be
> integrated with the motors.
> 
> 2.  Do you presently have Encoder feedback or Resolver feedback?  If
> you
> can't tell, post the numbers here and you will receive an answer. 
> (Posting
> all numbers here will be helpful, no matter how distant they may
> seem.)  I
> am going to guess by the age of your machine (20 years old) that they
> are
> resolvers.  If they are resolvers, you will have to include Encoders
> in
> your limited budget.
> 
> 3.  What is the model number of the Tree Mill?  Does 2UVR-C appear
> anywhere?  On the back of the column on that little door?

I dont remember that number, I look for it.

> 
> 4.  How many Getty drive packages are there?  Two?  I believe your
> Spindle
> motor is one or two fixed speeds at the most and the Z-axis is not
> controlled by encoder or any position feedback.  If this Tree is
> anything
> like the ones I have seen it is a flat milling machine, with preset
> drilling  done by a depth-stop micrometer.  The quill comes down,
> hits a
> mechanical stop, and a clutch slips to hold it there.  I would have
> to go
> to our Tool Room to check this out.  (We have well over 150 CNC
> machines in
> our manufacturing facility, and I don't have them all in my head.) 
> Get all
> the numbers from the Spindle motor.

 there are two GETTYs, I'll take a look at which is which.

> 
>      I believe we could make this Tree Mill Retrofit a group effort. 
> I
> have a lot of experience repairing machine tool electronics and doing
> drive
> setups (Servos), but no experience and less knowledge with EMC.  I
> have
> been reading this list over a year and I recognize lots of expertise
> here.
> 
>      A number of assumptions have been made here.
> 
> 1.  You have Gettys N360, 3 phase, half wave controllers. (Might be
> called
> a RN136 somewhere.)


>      Note:  this has since been confirmed.
> 2.  You have a 2UVR-C Journeyman Tree Mill machine.
> 3.  The present controller has a keypad on the upper left of the
> pendent
> that looks like a touch telephone keypad.  If you want, I can send
> you a
> JPG picture of the one we tossed out when I retrofitted it to an
> Allen
> Bradley 8400 in the late 80's.
> 
>      If the above is true, I can send you spare manuals of all three
> items.  Item 3 would be the Operators manual.  (I am an unrepentant
> pack
> rat.)  Email your Snail mail address to me privately if you want any
> of
> this.  No cost.
> 
> Later,
> 
> Gene
> 
> 


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