scooter
28th November 2004, 12:49 AM
Thought I'd share how I set up dust extraction on my scrollsaw.
Here's a link showing how the dust extraction kit on Hegner (H.) saws is set up :
http://www.slamnet.org.uk/designtech/Health%20&%20Safety/Jig%20Saw%20Dust%20Extraction%20April%202002.PDF
I cobbled up a system for my Delta 40-540 using the ideas in the link which works well.
I used an old radiator hose for the bottom hose, this had a sort of right angle bend at one end that I located under the bottom blade clamp, cut away a little of the hose to clear the end of the arm. It occured to me you could use PVC pipe and an elbow to achive this also, but the rad. hose can be pushed aside when changing the blade.
The rad. hose is secured to the top of my scrollsaw stand with a saddle a la the H. setup; the opposite end of the hose is adapted to suit the hose coming from my mini cyclone and vacuum cleaner.
The tube for the top hose is 10mm vinyl tubing from Bunnings, I bought a metre that is barely enough, it is only $1.43 odd p/m so would be best to get 1.5m. The end is cut into a elongated V per the H. piccy, and inserted into the radiator hose. The hole in the rad. hose was cut using a hole punch made from a sharpened bit of steel tubing, this gave the cleanest cut through the wall of the hose. I experimented with hole sizes so the vinyl tube would be a firm push fit.
The 10mm tube goes toward the back of the saw, then up and forward to the blade holddown.
On my Delta saw the small blower tube and holddown are secured to a sturdy steel pipe that runs forward from the back of the saw next to the upper arm. I took the holddown and blower off the saw, but used some of the bits plus a small saddle and a L shaped piece of steel rod to locate and secure the vinyl tubing near the end of the steel pipe, about 7" back from the blade up and to the right. The end of the vinyl tube basically sticks out from here to terminate at the back of the blade. This means that the tubing can just be pushed out of the way when feeding the blade through an inside cut, and doesn't get in the way as the holddown foot could in the H. setup in the link. This idea was copied from something similar seen on Neil Schultz's saws at the WW show. The position of the tubing can be altered by twisting it in the saddle or moving slightly the clamp on the steel tube.
The Hegner setup uses an opaque plastic tube that looks a little stiffer than the vinyl tubing, this would be better if you can get it but the vinyl tubing works well anyway. The important part is tubing that has a big enough ID without being too bulky, and that has some rigidity to support itself for the last 7" or so to the back of the blade.
I don't have a digital camera so can't post any pics yet, will do so if /when friends who are thus equipped come to visit :).
I'd encourage you to consider this setup or something similar, it beats getting the dust in your eyes and lungs.
Downside? About the only one is the noise of the vacuum running, not that significant but it means you have to turn the cricket up :p. I am still vegetating on an idea to use the belt drive blower and motor out of a clothes drier to provide the "suck", could run all day and would be quieter. Airflow would be no problem but not sure if it would suck hard enough, still worth a prototype I reckon for the potential benefits.
Sorry about the length of post and lack of piccies, fire away if anything needs clarifying.
Cheers.............Sean
Here's a link showing how the dust extraction kit on Hegner (H.) saws is set up :
http://www.slamnet.org.uk/designtech/Health%20&%20Safety/Jig%20Saw%20Dust%20Extraction%20April%202002.PDF
I cobbled up a system for my Delta 40-540 using the ideas in the link which works well.
I used an old radiator hose for the bottom hose, this had a sort of right angle bend at one end that I located under the bottom blade clamp, cut away a little of the hose to clear the end of the arm. It occured to me you could use PVC pipe and an elbow to achive this also, but the rad. hose can be pushed aside when changing the blade.
The rad. hose is secured to the top of my scrollsaw stand with a saddle a la the H. setup; the opposite end of the hose is adapted to suit the hose coming from my mini cyclone and vacuum cleaner.
The tube for the top hose is 10mm vinyl tubing from Bunnings, I bought a metre that is barely enough, it is only $1.43 odd p/m so would be best to get 1.5m. The end is cut into a elongated V per the H. piccy, and inserted into the radiator hose. The hole in the rad. hose was cut using a hole punch made from a sharpened bit of steel tubing, this gave the cleanest cut through the wall of the hose. I experimented with hole sizes so the vinyl tube would be a firm push fit.
The 10mm tube goes toward the back of the saw, then up and forward to the blade holddown.
On my Delta saw the small blower tube and holddown are secured to a sturdy steel pipe that runs forward from the back of the saw next to the upper arm. I took the holddown and blower off the saw, but used some of the bits plus a small saddle and a L shaped piece of steel rod to locate and secure the vinyl tubing near the end of the steel pipe, about 7" back from the blade up and to the right. The end of the vinyl tube basically sticks out from here to terminate at the back of the blade. This means that the tubing can just be pushed out of the way when feeding the blade through an inside cut, and doesn't get in the way as the holddown foot could in the H. setup in the link. This idea was copied from something similar seen on Neil Schultz's saws at the WW show. The position of the tubing can be altered by twisting it in the saddle or moving slightly the clamp on the steel tube.
The Hegner setup uses an opaque plastic tube that looks a little stiffer than the vinyl tubing, this would be better if you can get it but the vinyl tubing works well anyway. The important part is tubing that has a big enough ID without being too bulky, and that has some rigidity to support itself for the last 7" or so to the back of the blade.
I don't have a digital camera so can't post any pics yet, will do so if /when friends who are thus equipped come to visit :).
I'd encourage you to consider this setup or something similar, it beats getting the dust in your eyes and lungs.
Downside? About the only one is the noise of the vacuum running, not that significant but it means you have to turn the cricket up :p. I am still vegetating on an idea to use the belt drive blower and motor out of a clothes drier to provide the "suck", could run all day and would be quieter. Airflow would be no problem but not sure if it would suck hard enough, still worth a prototype I reckon for the potential benefits.
Sorry about the length of post and lack of piccies, fire away if anything needs clarifying.
Cheers.............Sean