Not trying to dispute this, Bohdan, but I don't understand why the motor seems to increase in pitch and sound more like a jet plane taking off when it gets blocked (if that's the same as what you meant by being starved).
Regards Adam
Printable View
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.
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.
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
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
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.
Attachment 467272
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.
Attachment 467267
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! :o
Attachment 467264Attachment 467265Attachment 467271
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.
Attachment 467269
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
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.
Thanks Bohdan
I wasn't even sure what a drum recycler was :doh:
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
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.
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.
Anyone in southern Tassie got any 20l paint tins with the rings locks they'd like to sell to me? :wink:
(asked a few paint shops/painters...no luck so far)