David Giles
12-24-2007, 4:24 PM
Rather than buy a cyclone, I decided to tackle the most daunting project first, increasing the DC port on the Sawstop to 6". It would have been straightforward to add a metal takeoff plenum, but since the remaining duct is all 6" PVC, it made sense just to stay PVC all the way.
One key is to rout a template hole of the 6" pipe using a flushtrim bit and a pipe cap. The template should tightly fit over the pipe. Then make a couple of sacrificial templates from the first template to use as guides in cutting a hole in the saw wall. Grind or cut off the 4" port that is tacked welded to the wall. The top of the 6.2" diameter hole is the same as the 4" port in order for the 6" fittings to lay on the floor of the saw.
The hole was cut undersized with a jigsaw and ground smooth with a Dremel (which is a slightly underpowered tool for this job, but it can be done). The template was crucial in making a perfect hole diameter.
A 5.75" long pipe was inserted in the hole and sandwiched between the internal and external fitting. It doesn't matter if it leaks a little into the saw.
Inside the saw is a 6x6x4 tee with a pipe cap end. The 4" stub connects to the shroud around the saw blade with thin, flexible hose. The pipe cap has a hole cut in it to increase the total air flow. The tee and pipe cap have to be shortened or the motor will contact it when lowered.
I didn't put a blast gate at the saw. There is plenty of air flow at the end of the run for a future router table collection system.'
After changing all of the ports and ductwork to 6", the little 1.5HP Jet motor pulls plenty of air! I think I'll turn that plastic shed into a knockout dust collection bin and forgo the cyclone for now!
dcoverall.jpg (http://www.sawmillcreek.org/attachment.php?attachmentid=77862&stc=1&d=1198531125) dcbench.jpg (http://www.sawmillcreek.org/attachment.php?attachmentid=77858&stc=1&d=1198531125) dcbench2.jpg (http://www.sawmillcreek.org/attachment.php?attachmentid=77857&stc=1&d=1198531125) dcosjet.jpg (http://www.sawmillcreek.org/attachment.php?attachmentid=77861&stc=1&d=1198531125) dcsawstop.jpg (http://www.sawmillcreek.org/attachment.php?attachmentid=77863&stc=1&d=1198531125)
One key is to rout a template hole of the 6" pipe using a flushtrim bit and a pipe cap. The template should tightly fit over the pipe. Then make a couple of sacrificial templates from the first template to use as guides in cutting a hole in the saw wall. Grind or cut off the 4" port that is tacked welded to the wall. The top of the 6.2" diameter hole is the same as the 4" port in order for the 6" fittings to lay on the floor of the saw.
The hole was cut undersized with a jigsaw and ground smooth with a Dremel (which is a slightly underpowered tool for this job, but it can be done). The template was crucial in making a perfect hole diameter.
A 5.75" long pipe was inserted in the hole and sandwiched between the internal and external fitting. It doesn't matter if it leaks a little into the saw.
Inside the saw is a 6x6x4 tee with a pipe cap end. The 4" stub connects to the shroud around the saw blade with thin, flexible hose. The pipe cap has a hole cut in it to increase the total air flow. The tee and pipe cap have to be shortened or the motor will contact it when lowered.
I didn't put a blast gate at the saw. There is plenty of air flow at the end of the run for a future router table collection system.'
After changing all of the ports and ductwork to 6", the little 1.5HP Jet motor pulls plenty of air! I think I'll turn that plastic shed into a knockout dust collection bin and forgo the cyclone for now!
dcoverall.jpg (http://www.sawmillcreek.org/attachment.php?attachmentid=77862&stc=1&d=1198531125) dcbench.jpg (http://www.sawmillcreek.org/attachment.php?attachmentid=77858&stc=1&d=1198531125) dcbench2.jpg (http://www.sawmillcreek.org/attachment.php?attachmentid=77857&stc=1&d=1198531125) dcosjet.jpg (http://www.sawmillcreek.org/attachment.php?attachmentid=77861&stc=1&d=1198531125) dcsawstop.jpg (http://www.sawmillcreek.org/attachment.php?attachmentid=77863&stc=1&d=1198531125)