06-09-2023, 08:28 AM
Leaving it alone is difficult when it can be fixed or improved.
The shopvac had the cup in side the filter, so that if if was picking up wet stuff, and tilled on its side, the cuo gets sucked into intake and prevents ingestion into motor.
But i never expect to use it to lpck up wet. Without this cup, there is no need for cup to seal around opening to centrifugal impeller, which spins at 20k rpm. So i drilled a bunch of holes around the perimeter of where it once would seal in case of tipover
There was also this 'finger grill' guard just below impeller. With it spinning, placing my finger 1 inch from opening and motor started making a different noise and exhaust flow significantly attenuated.
I cut out one row of guards, and tapered leading and trailing edges of the remaining and the repeated test was way quieter, flowed way more air, but fingers near intake still caused attenuation of flow.
The exhaust port, i like to hook a hose to it and direct the exhaust, but this adds restriction, and i dont have a bunch of extra 1.25" id hose. I do have tons 1.5" id hose from the pool cleaner, but it did not fit he shop vac exhaust.
Now it does.
Previously hooking a 1.25" hose to exhaust, while running, changed the tempo of motor. NOw, with 1.5" exhaust hose installed in exhaust port while running, tempo stays the same but motor noise is attenuated.
The efficacy of my modifications exceeded my expectations.
Usually tiny improvements fall into unmeasurable placebo possibility, but there is no doubt the shopvac is now quieter and has significantly more suction, at all speeds.
I often run it on a router speed controller when i dont need Nuclear grade suction, and or want to reduce noise generate or want to prevent tripping a breaker when using it to collect tablesaw dust.
And im going to be making huge quantities of dust soon. But tablesaw needs some improvement as to where it pulls the dust from.
Online purveyors are getting 1200$ for a 40x 60" bahama/bermuda shutter, before freight charges.
My tablesaw louver jig prototype, is in version 2.
Fractions of MM's matter.
The shopvac had the cup in side the filter, so that if if was picking up wet stuff, and tilled on its side, the cuo gets sucked into intake and prevents ingestion into motor.
But i never expect to use it to lpck up wet. Without this cup, there is no need for cup to seal around opening to centrifugal impeller, which spins at 20k rpm. So i drilled a bunch of holes around the perimeter of where it once would seal in case of tipover
There was also this 'finger grill' guard just below impeller. With it spinning, placing my finger 1 inch from opening and motor started making a different noise and exhaust flow significantly attenuated.
I cut out one row of guards, and tapered leading and trailing edges of the remaining and the repeated test was way quieter, flowed way more air, but fingers near intake still caused attenuation of flow.
The exhaust port, i like to hook a hose to it and direct the exhaust, but this adds restriction, and i dont have a bunch of extra 1.25" id hose. I do have tons 1.5" id hose from the pool cleaner, but it did not fit he shop vac exhaust.
Now it does.
Previously hooking a 1.25" hose to exhaust, while running, changed the tempo of motor. NOw, with 1.5" exhaust hose installed in exhaust port while running, tempo stays the same but motor noise is attenuated.
The efficacy of my modifications exceeded my expectations.
Usually tiny improvements fall into unmeasurable placebo possibility, but there is no doubt the shopvac is now quieter and has significantly more suction, at all speeds.
I often run it on a router speed controller when i dont need Nuclear grade suction, and or want to reduce noise generate or want to prevent tripping a breaker when using it to collect tablesaw dust.
And im going to be making huge quantities of dust soon. But tablesaw needs some improvement as to where it pulls the dust from.
Online purveyors are getting 1200$ for a 40x 60" bahama/bermuda shutter, before freight charges.
My tablesaw louver jig prototype, is in version 2.
Fractions of MM's matter.
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