David Gessel
Welding headers
Today I got to weld again, for the first time in about 8 years. I like TIG welding, it’s very satisfying, though I think I gave myself a bit of a tan – my skin has that “just welded” smell. The tubing is an exhaust header for the hovercraft motor. I also fabricated a nice metric broach to cut a keyway in the shaft adapter I designed (and Mark cut out on the Mori Seiki I fixed last week). Fun work… tired now…
Blooming Yard
The yard is flowering very nicely at the moment….
depearlized
Pearl parts
If you have a blackberry pearl and you work near metal dust or filings it will not last long.
I took mine to SRL yesterday and needed to use it with dirty hands. I wiped them off on my shirt, really, then used it a few times and noticed that the trackball had stopped running smoothly. The problem is not just the dirt (see the black streaks around the knurls on the little potato masher shafts), but metal flakes that stick to the magnets.
Turns out the blackberry’s trackball works with four little hall effect sensors on the mother board (you can see one of the black sensors in the top right of the cavity where the trackball was). The black ends of the four little (TINY) potato mashers are magnets and attracts dirt… and tools.. and make them endo and stick to things in very annoying ways as you try to reassemble the trackball. If you get a metal flake wedged between the sensor and the magnet cylinder as you roll the cylinder past it you draw nice metal residue rings around the black magnet, which do not come off easily (but fortunately do not affect operation).
Cleaning each bit carefully with rubbing alcohol, blowing out the cavity and the magnets, and particularly working on a strip of tacky paper (like painter’s masking tape) makes it possible to clean the parts and get the little metal bits off. The pearl itself is very likely to make a break for it across any gradient. It’s only 3.5mm in diameter; do not lose it.
These instructions helped. Basically pry the silver ring off gently from the front (under the 2/t/y key) and pop the trackball assembly out. Mine did not have the second metal retaining ring in it and seems to work fine without it.
All back together now, but it will not be accompanying me into environments with metal dust and chips as the sensor is perfectly designed to draw them into the workings and specifically right to where they will jam the rollers. It does seem fairly immune to finger grease and pocket lint though.
Yard flowers
image/jpeg
This was cut down a year ago by a gardener but grew back. The jasmine, which takes longer to grow, just suffered the same fate. Why, why do they hate the flowers so?
First try posting by email
This is an attempt to post to my blog via email. If it works, then one postie cron job does the trick, otherwise I’ll have to set up a postie cron for each blog on the system… let’s find out!
The trouble with twins: CARMICHAEL & SHANE (2006)
We saw this at Telluride: snorking funny.
https://vimeo.com/4690806