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Fan to blow away milling chips - Help needed

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John Hill:

--- Quote from: DaveH on November 25, 2011, 05:59:31 AM ---David,

One of the best ways I have found  to get rid of the chips, is to use the air in a non continuous manner.

Such as Puff .................Puff .................Puff ..................Puff

Reminds me of that song Puff the magic dragon.
 :beer:
DaveH

--- End quote ---

Hmmmm, another use for the shaper,  pumping a bellows! :lol:

Springbok:
Hi
Absolutely new to this forum but got 50yrs of engineering behind me could I recomend that you never blow chips if MDF  Fibreboard or any wood chippings,  think of your eyes and lungs.  Have you a small area outside the workshop that you can create a very small shed insulated with say the material for roof insulation a pipe going into the workshop aimed at work you could have the switch inside the shop so no problems.

Bob
 :beer:

Lew_Merrick_PE:
David,

What I usually do when dealing with potentially packing swarf is place an air nozzle (loc-line type) pointing from an appropriate direction at the cutter (throttled to something like 40 psi) with a vacuum line (this is where that big triangular piece that never seems to have an application comes in handy) on the other side of the cutter.  The vacuum line picks up whatever the pressure line removes (and helps keep things moving in addition to the "blow").  My "trick" has been to mount my compressor and big shop vac (not having sprung for a real stationary vacuum cleaner) in an insulated cabinet (6 inches of fiberglass insulation seems to do the trick) that reduces the noise to an acceptable level.  ???

David Morrow:

--- Quote from: Lew_Merrick_PE on March 13, 2012, 12:22:37 PM ---David,

What I usually do when dealing with potentially packing swarf is place an air nozzle (loc-line type) pointing from an appropriate direction at the cutter (throttled to something like 40 psi) with a vacuum line (this is where that big triangular piece that never seems to have an application comes in handy) on the other side of the cutter.  The vacuum line picks up whatever the pressure line removes (and helps keep things moving in addition to the "blow").  My "trick" has been to mount my compressor and big shop vac (not having sprung for a real stationary vacuum cleaner) in an insulated cabinet (6 inches of fiberglass insulation seems to do the trick) that reduces the noise to an acceptable level.  ???

--- End quote ---

I'm doing some of that now with the compressor and my old Lok-line that was used for liquid coolant that I don't use anymore ( too messy ). What I've been thinking though is get a small shop vacuum for the next room and plumb in two lines - one for the suction port and one for the blowing port. That way I just use one machine. Which proves that old adage wrong - that you can't suck & blow at the same time.

Lew_Merrick_PE:

--- Quote from: David Morrow on March 13, 2012, 12:37:34 PM ---
--- Quote from: Lew_Merrick_PE on March 13, 2012, 12:22:37 PM ---David,

What I usually do when dealing with potentially packing swarf is place an air nozzle (loc-line type) pointing from an appropriate direction at the cutter (throttled to something like 40 psi) with a vacuum line (this is where that big triangular piece that never seems to have an application comes in handy) on the other side of the cutter.  The vacuum line picks up whatever the pressure line removes (and helps keep things moving in addition to the "blow").  My "trick" has been to mount my compressor and big shop vac (not having sprung for a real stationary vacuum cleaner) in an insulated cabinet (6 inches of fiberglass insulation seems to do the trick) that reduces the noise to an acceptable level.  ???

--- End quote ---

I'm doing some of that now with the compressor and my old Lok-line that was used for liquid coolant that I don't use anymore ( too messy ). What I've been thinking though is get a small shop vacuum for the next room and plumb in two lines - one for the suction port and one for the blowing port. That way I just use one machine. Which proves that old adage wrong - that you can't suck & blow at the same time.

--- End quote ---

The thing to remember is that, if the vacuum end of things starts to get plugged, you lose the air supply side of things -- or if the air supply side of things gets plugged, you lost the vacuum side of things.  In order for this to work, you will want (need) accumulators on both sides of the equation (this being the voice of experience).

Also, I have found that a length of 1/4 inch OD X 1/8 inch ID polyurethane tubing wound with 16 gauge copper wire (left over from a small job) with a nozzle (mine is aluminum) with a 1/64 inch orifice (only the last .020 or so is drilled at that size) works quite nicely for the "air supply" side of things.  The copper wire "overwind" lets me aim it wherever I wish.  I wound that as if it were a spring on a ø.230 mandrel at (about) a .200 (or so) pitch.

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