@Vaughn I moved this topic to tools and space category. The workshops category was made recently to organize classes. I realize now that the name is a bit ambigouse. We can rename that if needed. Hope you dont mind. Thanks!
Those estimates were based on a fairly heavy workload, and they may be a little overkill, but I think that the filter should probably be checked that often, and cleaned when necessary.
The lack of primary dust collection is a major gap, and will make that unit work much harder than it should. This is really something that it is urgent for us to address from a liability, and a health and safety perspective. The fact that we have educational activities going on in this shop, and have not addressed this basic shop safety requirement is a major issue.
The thermostat is in an awful place directly above the servers (this reminds me of a story where a company had their servers constantly overheating because nobody noticed the thermostat was below the outlet for the air conditioner) and it’s a pain to reach unless you drag the ladder out.
In the meantime FYI I have turned the heater off at the thermostat and switched the red circulation pump off at the switch below relay C in the boiler room.
@derpko had a look at it last night and we think the issue has been solved.
This does bring up the issue of if there’s a problem with one of the machines you work with PLEASE deal with it or tell someone
@kile lets dial you into the discussion about the Classroom reno, the Social Planning Grant requirements related to it, and the opportunity to do the Classroom AND the Kiln Room in the same window. We need to avoid middle May for reno’s, because of Kathleen Raven workshop and 100th Hack.
I demonstrated on my tiger wheel instead but I did show how to use the big wheel anyways, I just didn’t throw on it. No rush on working on it as I won’t be demonstrating on it for a while. But new people can use it to their liking.
@clarkwerk Absolutely. Aluminum in the presence of most strong acids reacts to produce hydrogen gas and heat. In large enough quantity you get fire or explosions. (When I was in high school, we used to fill garbage bags with H2 gas by taking a plastic conainer of H2S04 or HCl, dumping in crumbled balls of aluminum foil, and throwing the bag over… Don’t ask what we did with floating bags of explosive gas!) In small quantity, the acids will cause pitting of the surface of the aluminum, which increases the surface area of the pitted part, which then reacts more rapidly… Causes pinholes then crumbling.
We passivate stainless by soaking in strong acid until the iron at the surface is eaten away, leaving a chrome and carbide surface (which is mostly non-reactive to the acids)