Republic Blower Noise

[Austin Shafer]

Hello everyone its been a while since I have been on here. We purchased a used Alpha as our second CNC and it came with a Republic blower for the vacuum hold down. Do you think we can hook it up right under the machine and still keep our ears in tact while it is operating or do we have do construct something to minimize the sound?

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[bleeth]

I put my blower near a garage door 18' or so from my bot so it blows the hot air out the door.
A piece of pipe extending the outflow helps a little, noisewise, and you can add a muffler but that just cuts down on suction power for a few DB's
It's loud but a bit hogging plywood is louder as are most dust collectors.

[Keith Larrett]

Mine is under my machine. Like Bleeth said, it's loud and it puts out some heat, but you get used to it. The bit cutting and the dust collector probably make more noise. You're not going to have a conversation without raising your voice, especially with the noise of the cutter and the dust collector in combination with the blower. I wear headphones when cutting.

[zeykr]

Mine is outside in an enclosed shed with exhaust plumbed to a 'switch box' on the inside wall so I can direct the heat inside in the winter and outside in the summer

[Austin Shafer]

Thanks guys. I feel pretty comfortable installing directly under the table now!

[Austin Shafer]

how bad does the distance the blower is to the table effect suction? would we be able to put it like 100 foot away?

[Austin Shafer]

They are having an electrician run the electric for the new CNC and vacuum and I guess we have almost maxed out the electric for this building so they are quoting A LOT to do the job. It could save us a lot if we could put the blower in our little building right beside our big one but it is quite far from where the CNC is located. Is there some sort of max distance we could go and still have good suction?

[bleeth]

Some distance can be a good thing as it helps with added volume of air, but I would imagine there are diminishing returns as you get too far.
Lot's of operators have them in an adjacent area but I don't know of anyone with their blower that far away. I would check with a true blower tech for the answer to that one.

[Austin Shafer]

Some distance can be a good thing as it helps with added volume of air, but I would imagine there are diminishing returns as you get too far.
Lot's of operators have them in an adjacent area but I don't know of anyone with their blower that far away. I would check with a true blower tech for the answer to that one.

Thank you sir. I will look into it.

[Austin Shafer]

I emailed republic and am awaiting a response. I measured right around 175 feet :eek:

[Austin Shafer]

Republic informed me that we would lose almost all suction at the distance that we were talking about. Figured I would share this chart with everyone here.

http://www.engineeringtoolbox.com/ductwork-friction-loss-d_1122.html

[knight_toolworks]

I emailed republic and am awaiting a response. I measured right around 175 feet :eek:
don't think that is going to work. I think it was brady who said the max distance.
here is one article. looks like the longer the pipe the more " you loose.
http://www.ptonline.com/articles/vacuum-blower-or-pump-problems-extend-it-fix-it-or-make-it-more-efficient

[knight_toolworks]

your solution is to just buy a much larger pump. 50ph should do it.

[bleeth]

"Almost maxed out" often refers to worse case heaviest usage as opposed to how much is really being used.
Most equipment draws are usually on start-up only and then consume much less under operation.

Another thought: If you are only maxed out in the main building can you run a line from the shed to the main to run the blower there without having to raise more power?
It's still a lot of cable but if it's only running the blower it shouldn't have to be that big a guage.
It will need a bit of oversizing due to distance. Electricity loses over transmission distance as well.

Also-Get more quotes from alternate electricians. Prices can vary widely.
Some actually determine materials and estimate time and others use an estimating guide which is usually generous for the supplier.

[jerry_stanek]

your solution is to just buy a much larger pump. 50ph should do it.

He has the option of under his table with upgraded electric that would be a lot cheaper

[knight_toolworks]

He has the option of under his table with upgraded electric that would be a lot cheaper


ya and it won't be as loud as a jet.