Hello Eric and Georges,

I've thought that this is not a problem. It's just supposed to be so.

No matter how far the bellow is shrunk, it will be stretched out until
the display goes zero when you pressed "reset". For example, let's say
the bellow was set at 1000. If you re-start the software with this
bellow position, the display will show the bellow at 0 although it
hasn't changed. However, by re-setting the bellow the software will
recognize the full expansion which is the reference position as zero.
The number of bellow setting is just a matter of precision of bellow
adjustment, I guess. It seems to me a bit of burden on the motor
though...

Let me know if you think this is wrong.

Cheers, Satoshi

*****************************************************
Stable Isotope Research Laboratory
1L123 Thompson Bldg., Environment Canada
4905 Dufferin St., Toronto, Ontario, M3H 5T4 
Canada


-----Original Message-----
From: Stable Isotope Geochemistry [mailto:[log in to unmask]] On
Behalf Of Georges L. Paradis
Sent: February 27, 2006 7:58 PM
To: [log in to unmask]
Subject: Re: [ISOGEOCHEM] bellows settings on isoprime


Hi Eric,

I know that queasy feeling when the bellows stepper motor just keeps on 
pushing after the bellows is fully squeezed! I'm not aware of the
stepper 
motors pulling too far in the expand direction.  To fix the 'squeeze too

hard' problem, try double clicking the reference bellows and click
setup. 
At the bottom of the list there is a parameter called 'maximum travel'. 
4000 is a good setting for our machine.  I think 4600 is the default,
which 
is terribly high.  We also have the 'electrical stop' button selected.
The 
sample bellows default of 3500 seems to be ok and hasn't needed
adjustment.

This setting does affect the bellows cycling at the beginning of each 
analysis when looking for min/max ref beam.

Good luck,
Georges


----- Original Message ----- 
From: "QRC Isotope Lab" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, February 27, 2006 3:15 PM
Subject: [ISOGEOCHEM] bellows settings on isoprime


> Does anyone know how to set the bellows max/min on MassLynx4, for
> Isoprime?
>
> There is a setting in the "inlet editor" but this is ignored by the
> scripts.  The bellows are getting pulled and stretched much farther
than 
> they should be, and we have not been able to figure out how to stop
this.
>
> Does anyone know how to set this up correctly?
>
> Thanks
>
> Eric Steig
>