Preliminary test measurements on my dust collection system

Alan Bienlein

Member
Messages
2,044
With all the discussion on dust collection systems lately I figured I would take John Lanciani up on his generous offer of borrowing his test equipment. He sent the following test equipment for me to take readings on my home built Pentz design cyclone.

Dwyer 471 hot wire anemometer, a UEI EM151 digital manometer, and a basic analog clamp-on ammeter but I substituted my Sperry digital clamp on amp meter.

My system is home built from plans on Bill Pentz's website. It is a 20" diameter cyclone with the Leeson 5 hp motor turning a 16" backward incline steel impeller. It has a 5" x 10" rectangular intake and exhaust into 2 seasoned Wynn 9L300 filters. I did not clean the filters before taking these measurements.

Here are a couple of photos of my setup. I put numbers on each drop to make it easy to follow exactly what part I am testing.

This picture shows where I connected the manometer and the hole circled in red is where I inserted the hot wire anemometer.
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Here are the pictures with the corresponding numbers for the test. All measurements were taken in the 8" duct and opening and closing the blast gates on the various branches. Talking with John he said to divide the FPM by 2.85 to get the cfm.

numbers.jpgmore numbers.jpg

Blastgate-----SP-----FPM------CFM------Amps---------Tool

All closed-----14.9"---700------245-------11.8---------None

All open-------3.6"---6250-----2192------18.5----------All

#1-----------10.9"---3400-----1192------16.5---------SCMS

#2-----------11.5"---3125-----1096------16.3--------8" jointer

#3-----------12.4"---2900 ----1017------15.6--------Ridgid TP1300 Planer

#4-----------6.21"---5600-----1964------17.9--------End of duct work

#5-----------10.2"---3600-----1263------16.9----------Table saw

#1 & #5------6.51"---5200-----1824------17.8--------Table saw & SCMS

#2 & #3-------8.3"---4300-----1508------17.4--------8" jointer & TP1300 Planer


These readings are with the machines connected like they are normally used. Number 4 is an end of duct run that I thought I might use one day to expand.


I do want to plot a graph of SP and CFM for my system but want to make sure I do it correctly so I don't waste my time repeating it so any help would be appreciated.
 

fred hargis

Member
Messages
789
Location
Wapakoneta, OH
There's nothing like having actual data to assess a system, and you have some impressive numbers! I hope to upgrade my POs Oneida to a CV someday. Did you install the air ramp in your shop built version?
 

Alan Bienlein

Member
Messages
2,044
There's nothing like having actual data to assess a system, and you have some impressive numbers! I hope to upgrade my POs Oneida to a CV someday. Did you install the air ramp in your shop built version?
I built it per his plans so yes it has the air ramp.
 
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