rash_powder

I built a similar device! mine uses 3/4” pvc, and suction is provided by a surplus Amstel Lamb whole home vac motor. I’m really going to have to take pics to show you guys! i also left my joints all loose to have clean out ability, and it’s great for swinging the pick ups out of the way.

I have a Jet 1100cfm dust collector in the garage, but unfortunately run my scroll saw in the basement of the house. I have pondered how to run a duct into the house, but haven’t come up with a satisfactory method. So I built a dust collecor for my scroll saw. i believe I saw the pic here, so I cannot take credit for the parts that attach to the saw. It is just 3/4” pvc and loc line flexible pipe. The collector portion is a 1/2 gallon jar that I made an adapter flange on the large for a dust deputy. I used 1-1/2” pvc caps with *I think* 1-1/2” holes drilled through them to adapt the dust deputy to 1-1/4” vac hose. The vac is a 3 stage Amtek Lamb I got from the local surplus center. I do not plug this into 120VAC; instead I use a motor controller from a treadmill which outputs 0-90VDC. The motor runs much quieter on DC, and the variable output means I can dial suction in to what I want. I have found 30V provides ample suction and I cannot hear the vac motor over my Hegner. A HEPA filter could easily be fitted over the exhaust if I wanted. It works very, very well. I just need to make a small cart or board to mount it all too. i unfortunately do not have pics of it on my phone, but can post some if people wish to see it.

I was cutting 3/4” poplar with 10.5 tpi olsonnpgt blades. A test cut later with an Olson Mach speed 8 tpi ( I think, something less than ten anyway). I have a Hegner 21” variable speed saw at full speed. Not sure if it matters but dust is very minimal as I have a home made dust collector attached that sucks up most all the dust as I make it.

I was cutting a trivet last night, about 7 1/4" diameter, from 3/4" poplar and came across a puzzling sound. As I cut around my circle and the decorations within, I found that as I went across the grain - dead perpendicular - no unusual sounds. However, as soon as I started cutting even a little bit with the grain, the blade began to sing/shreak louder and louder, peaking when going dead with the grain. Several different blades of differing tooth counts/configurations did this. It doesn't appear that anything was binding or slipping while the shreak was happening, and holding a finger nail against the back of the blade did not seem to help. Has anyone else experienced this? Its not affecting performance, but I would love for it to not shreak. Its bad enough I should wear ear plugs. Thanks!