Problem afm2 2001-06-28 17:51:00: pin broken on head

Kelvin Liu kliu at
Thu Jun 28 22:21:31 PDT 2001

Last night the pins were bent but all four were still intact.  This evening
one of the pins was broken off already when I got there.

Kelvin Liu
Staff Engineer
Molecular Reflections
6330 Nancy Ridge Drive Suite 107
San Diego, CA 92121
Ph: (858) 623-0259
Fax: (858) 623-0331
kliu at

-----Original Message-----
From: Peter Griffin [mailto:griffin at plumb.Stanford.EDU]
Sent: Thursday, June 28, 2001 6:12 PM
To: kjliu at
Cc: afm2-pcs at
Subject: Re: Problem afm2 2001-06-28 17:51:00: pin broken on head

This is because people "lever" the tip holder off the column.

It causes more problems than just a break, it first bends the pins
so that there is not a solid connection between the tip holder and
the column, ruining the resolution for weeks before the pin eventually
gets broken off.

Push the tip holder straight on and ease it straight off - don't
lever or rock it to get it off.

Peter Griffin

On 28 Jun 2001 kjliu at wrote:

> one of the pins on the head is broken off

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