|Forum topic by ,||posted 09-11-2014 01:13 AM||912 views||0 times favorited||14 replies|
09-11-2014 01:13 AM
Just more thinking out loud here. Maybe someone might have some great insightful information or advice on my thoughts. We added a CNC and now I see a DC upgrade in the future.
What we currently run is a 5 hp Leeson (19 or 20 amps) with a 14” impeller. It is made by Delta. It is a Cyclone. Our old shop was smaller with shorter runs and 6” duct and the suction was so strong it would hold the weight of my arm in place in the duct.
Since moving to our new shop which is 40*80’ long, we now have longer runs of pipe. My main trunk that feeds everything is 8”. I noticed since getting up and running the suction is not strong enough to hold my arm anymore.
Then adding the CNC, I had to run another main trunk to the CNC, this time I used 6” pipe. But this run is 55-60’. Now my pipe going to the CNC is always clogging with small sliver rip off from dado cuts on the CNC. The run has just one 90 elbow then runs straight 50 or so ft to the CNC, then one more 90 elbow aimed down to gantry. The suction is very minimal at the CNC.
A couple thoughts. I can add more elbows everywhere I have a 90 degree, making more of a sweeping curve. The only 90 degree elbows I have in the design is on the drops where I aim down towards the machine. Mostly I am using Wye branches.
I have taped all the joints so I am not leaking suction that I am aware of.
I don’t really want to start over with a new model Cyclone. I don’t think other comparable 5 hp models will be that much upgrade, as I feel it is the length of runs that I am working against.
I am wondering if just upgrading to a 16” impeller would give me much upgrade???
Then I think maybe I could get a 7.5 hp motor to go along with an 18” impeller, that seems as it would be an upgrade. I could fabricate a new impeller housing and likely keep using the same cyclone. This seems as it would be a more affordable route just buying a new motor and a new impeller. And going with 7.5 hp allows me to stay with single phase. I could go 10 hp single phase but we are already pushing our upper power limitations with running our CNC, RPC and Becker Pump.
One more thing to add, not sure that this really makes any difference. But the Cyclone is outside, and I don’t have a barral or any filter to catch any of the shavings or dust. It all just flies into the air. I stopped using a barrel under the cyclone because it got full to quickly. Not sure though if this is causing me to loose any suction power???