Could this be because you were editing the pad location instead of the
component location?

I have a couple of single (through hole) pad test point parts with which
that I have noticed this - double clicking the pad brings up the pad
location properties box not the component location properties box.

> -----Original Message-----
> From: Robert M. Wolfe [mailto:[EMAIL PROTECTED]
> Sent: Tuesday, 26 August 2003 22:09
> To: Protel EDA Forum
> Subject: Re: [PEDA] Geometric Center
> 
> 
> Brad,
> I noticed that parts go off center in 99SE also
> when changing a parts location by typing
> in the X,Y in properties menu.
> Especially single pin parts for some reason.
> The only way I saw to fix it was update footprint
> from library, any better suggestions?
> 
> Bob Wolfe
> 
> 
> ----- Original Message ----- 
> From: "Brad Velander" <[EMAIL PROTECTED]>
> To: "Protel EDA Forum" <[EMAIL PROTECTED]>
> Sent: Monday, August 25, 2003 2:27 PM
> Subject: Re: [PEDA] Geometric Center
> 
> 
> Tim,
> on your original question about the mid part calculation, I 
> thought that it
> was calculated from the center point of the pads within the 
> device. I am not
> absolutely sure on that but that is what I recall from 
> experiments that I
> did years ago. It seemed to ignore the silkscreen and other layers and
> seemed to only calculate using the pads. Try calculating it 
> yourself using
> the pad centres of the pads in the device, a device like a 
> TO263 should
> easily show where the centre is being calculated from.
> 
> On your statement below I would caution you that there is a 
> bug in P99SE
> that I discovered a year or more ago when placing parts. If 
> you are moving a
> part while pressing the spacebar to rotate it, you can have 
> the part centre
> shift off of your cursor location. This is most prevalent if I used a
> rotation angle of about 5 degrees. It was worst if you moved the part
> quickly while doing the rotation. Not sure that this could be 
> what you have
> seen but thought I should mention it.
> 
> Sincerely,
> Brad Velander.
> 
> Lead PCB Designer
> Norsat International Inc.
> Microwave Products
> Tel   (604) 292-9089 (direct line)
> Fax  (604) 292-9010
> email: [EMAIL PROTECTED]
> http://www.norsat.com
> 
> CONFIDENTIALITY: This e-mail and any attached files may 
> contain information
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> 
> 
> 
> > -----Original Message-----
> > From: Tim Fifield [mailto:[EMAIL PROTECTED]
> > Sent: Monday, August 25, 2003 10:06 AM
> > To: Protel EDA Forum
> > Subject: Re: [PEDA] Geometric Center
> >
> >
> > Thanks John,
> >
> > We had some hall sensors that were placed properly on the PCB
> > but when we
> > imported the Pick and place files into solid edge to create a
> > 3D model and
> > mechanical check the halls we not placed correctly.  It 
> turns out that
> > because of the part rotation on the PCB, protels calculated
> > generated mid
> > x,y was different than my ref x,y (which is the center of the part).
> >
> > Tim
> >
> 
> 
> 
> 
> 


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