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Thread: Cyclone for shop vac issue
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15th January 2020, 03:05 PM #16
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15th January 2020 03:05 PM # ADSGoogle Adsense Advertisement
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15th January 2020, 03:14 PM #17GOLD MEMBER
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Because it is moving less air it has less load and it speeds up and what you hear is the siren effect of the fan.
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15th January 2020, 03:19 PM #18GOLD MEMBER
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That would create the blocking effect, whenever the nozzle is flat on the ground.
On my system I use 50 mm PVC pipe between the cyclone and vac and the either 38 or 50 mm hose to feed the cyclone. I do get blockages when vacuuming up sawdust and that is when my previous drum collapsed.
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15th January 2020, 03:20 PM #19
Ah thanks Bohdan, I assumed speeding up sound was the motor actually working harder. But it's just the sound of the fan. Thanks!
Regards Adam
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15th January 2020, 03:25 PM #20
Oh it's never flat on the floor, but thinking about it now, often large shavings from hand planes were getting trapped/stuck at the very end of the nozzle, I'd push them in and then they'd get sucked up. But that would still create the blocking effect.
So... I'll try you suggestion of 50mm PVC from the cyclone to the vac.
Thanks again, Bohdan.
Regards Adam
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15th January 2020, 05:44 PM #21SENIOR MEMBER
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16th January 2020, 11:49 AM #22
The dust bucket has kicked the bucket
Well, that was an interesting exercise. Think I'll get that metal bucket!
I've attached some photos of the setup. It was only temporary as I'm still playing around with hoses, fittings etc. (and will get 50mm PVC pipe for the cyclone/vac connections) but it was most definitely air tight.
11.jpg
Running the vac with either the single bucket or double was fine when there was no restriction on air flow, vacuumed up fine.
With the single bucket, as soon as any restriction occurred, it collapsed.
4.jpg
With the double buckets, it seemed a bit more sturdy, but I could still see flex when partially restricted. But once it was fully restricted (like putting my hand over the end of the hose)... disaster!
1.jpg2.jpg10.jpg
Interestingly, these buckets I have are definitely not even in thickness around the sides. If I placed my two hands on opposite sides and press together, then one side of the bucket would deform, but not the other. It was easy to feel the reduced stiffness in certain parts of the bucket. So crappy buckets only adding to the issue.
7.jpg
Off to source a metal tin/bucket... or maybe even a cheapie shop vac off Gumtree. I've seen a few before with stainless steel bins for $20 or less.
Thanks everyone for your assistance, suggestions and other ideas!
Regards Adam
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16th January 2020, 11:56 AM #23GOLD MEMBER
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I got my buckets from a drum recycler for only a couple of dollars. You have to make sure that both buckets are exactly the same.
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16th January 2020, 12:07 PM #24
Thanks Bohdan
I wasn't even sure what a drum recycler was
Had to Google it.
The two buckets I have are both the same, but clearly not sturdy enough. I'll look at a few of these local drum recyclers.
Regards Adam
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16th January 2020, 05:32 PM #25SENIOR MEMBER
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Looking at your pics the internal bucket looks to be sitting far higher than the external, it need s to be pushed down as tightly as possible. Rims touching.
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16th January 2020, 06:23 PM #26
Yeah it's as far down as it goes. There are ribs around the top sections of each bucket. But they were connecting/touching before they were sucked in. It pushed the inside bucket up higher after that. Pretty standard design for these types. They're just not suitable for this I'm guessing.
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16th January 2020, 06:32 PM #27
Anyone in southern Tassie got any 20l paint tins with the rings locks they'd like to sell to me?
(asked a few paint shops/painters...no luck so far)
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