[Adrian Stoness]

ipa as in beer?

On Sat, Jan 27, 2018 at 12:17 PM, Carl Claunch via cctech <
cctech at classiccmp.org> wrote:

> The IPA is heated to 60C before the ultrasound is able to remove the oxide
> remnants, FWIW.
>
> While we can often get the entire smooth surface of the head clean with
> swabs and IPA, it is very difficult to clean all the material that forms in
> the cruciform trench recessed into the head (where the read/write and erase
> coil poles are visible).
>
> Heads can seem clean to the naked eye, but a good stereo microscope will
> insure that you have a clean and smooth surface.
>
> Regards,
>    Carl
>
> Date: Fri, 26 Jan 2018 12:15:34 -0800
> > From: Fritz Mueller <fritzm at fritzm.org>
> > To: "General Discussion: On-Topic and Off-Topic Posts"
> >         <cctalk at classiccmp.org>
> > Subject: ultrasonic cleaning for disk heads
> > Message-ID: <9F2C2AC7-1B35-46F5-BD92-CC3DFD29FBFA at fritzm.org>
> > Content-Type: text/plain;       charset=utf-8
> >
> > I watched with great interest one of curiousmarc?s recent Alto videos,
> > wherein they clean a Diablo drive head ultrasonically.  I?ve been
> > struggling a bit with my restored RK05 drives to completely clean the
> heads
> > after minor head crashes.  Not being able to get them really sparkling
> > clean makes me always worried about running the drives for more than a
> few
> > minutes at a time, and a little nervous every time I spin them up?.
> > Scrubbing and scrubbing and scrubbing with IPA and kimwipes just doesn?t
> > seem to get all the crud off.
> >
> > I do have an alignment pack that I could use to re-align the heads after
> > removing them for a proper cleaning this way.  Decent ultrasonic cleaners
> > aren?t terribly expensive and might be nice to have around the shop
> anyway
> > (I could also do all my eyeglasses :-)
> >
> > In the video, the heads are submerged in IPA in a glass cylinder, which
> is
> > then placed in the ultrasonic bath.
> >
> > Has anybody on the list here done this and have tips/advice beyond what
> > can be seen in the video?  It looked very effective!  I?m also having a
> > little trouble sourcing the squat form glass graduated cylinder online.
> >
> >         cheers,
> >            ?FritzM.
> >
> >
>