smittex wrote:Everyone keep your nut material away from metis.
... and me as well.
I've never had problems with a specific species of wood being turned/sanded, but I built the air cleaner for just that reason. If folks would turn on the air cleaner whenever they are cutting, turning, sanding or otherwise making wood dust, I don't suspect I'd have a problem. I do not have a contact allergy to any wood species I know of.
As for the nut dust, I'm in the same bucket with metis. If the airborne shell or nut material makes it to my lungs, I'm going to have an asthma attack at the minimum. I know I said earlier that using it near an air cleaner would be best, but I've reconsidered. I know we're not the only ones with nut allergies and there are some more sensitive than I. Overall, it would be safest to return the walnut material and pick up some pumice or non-organic abrasive. I do not think that people would be 100% effective at removing all the walnut particles from something they've blasted (along with their clothing) outside before bringing it into the shop. There's just too great a risk.
Also, I don't foresee people actually dragging the blasting setup outside (in the snow?) when they need to use it - even with lots of posted warnings, etc, it just won't happen. An alternative would be an updraft hood or other airflow system that exhausted through a cyclone and then to outside (away from the parking/dock area, please!) - this should be investigated even with non-organics in use, because silicosis is both un-fun and irreversible. The welding area needs a good hood anyway and there's a window that could be removed for the purpose - it even has a sign suggesting a hood be put there, so I know someone agrees with me.