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Post by fsperring on Jun 9, 2019 12:17:18 GMT -5
I got my AR8 PRO in its new location and am now going to run ductwork for my dust collection system and a flexible hose to the shoe. In other parts of my shop I have the blast gates 88" off the floor (I'm 6' 5" so I can reach that just fine and when disconnected I dont hit my head.) I am doing a ceiling drop with a 5" pipe to a blast-gate and then a 4" reducer. From the reducer to the duct shoe will be flexible hose.
My questions for the group are:
1.) How high off the router should I stop the metal pipe work?
2.) How much 4" flexible hose for the point is optimal?
3.) Is there an optimal spot to have the pipe drop to - dead-center of table , corner or some other location?
Thank you for your consideration of my questions.
Foy
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Post by redwood on Jun 9, 2019 12:35:43 GMT -5
Generally speaking, the drop should be to the center of the table and length should comfortably reach to all corners.
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cyh
New Member
Posts: 11
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Post by cyh on Jun 9, 2019 17:34:39 GMT -5
As Redwood said, shoot for the center and as high as possible, works well for me. I placed a 4" gate at the end of the horizontal run, then a sweep 90 degree fitting with a 4" plastic swivel (Rockler) attached to the 90 fitting. 4" flex was installed from the swivel to the dust boot port. Install a 14 or 12 gauge jumper wire from the 90 degree fitting to the reinforcement wire in the flex tubing to eliminate static electric. This is assuming metal dust pipe is used on your system. I had to attach a piece of 1/4" x 4" x 15" baltic birch plywood to the spindle mount to support and align the flex pipe vertically. At the top of the plywood a hose clamp secured the flex hose.
For gate opening and closing, get creative. I attached a pivot on the ceiling with a 3/4" x 1 1/2" x 20" stick connected to the pivot and then a 1/4" all thread from the gate to the stick. The stick length is determined by ease of reach and out of the way. This has worked well for 2 1/2 years, no issues.
Hope this helps, Cy
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Post by fsperring on Jun 9, 2019 19:08:55 GMT -5
As Redwood said, shoot for the center and as high as possible, works well for me. I placed a 4" gate at the end of the horizontal run, then a sweep 90 degree fitting with a 4" plastic swivel (Rockler) attached to the 90 fitting. 4" flex was installed from the swivel to the dust boot port. Install a 14 or 12 gauge jumper wire from the 90 degree fitting to the reinforcement wire in the flex tubing to eliminate static electric. This is assuming metal dust pipe is used on your system. I had to attach a piece of 1/4" x 4" x 15" baltic birch plywood to the spindle mount to support and align the flex pipe vertically. At the top of the plywood a hose clamp secured the flex hose. For gate opening and closing, get creative. I attached a pivot on the ceiling with a 3/4" x 1 1/2" x 20" stick connected to the pivot and then a 1/4" all thread from the gate to the stick. The stick length is determined by ease of reach and out of the way. This has worked well for 2 1/2 years, no issues. Hope this helps, Cy Thank you very much for your insight Cy, You really have me rethinking were I place the blast gate and how I run the metal ductwork. Moving the blast gate closer to the main branch will improve the overall system static pressure when not in use. I have seen the ball joint fittings in metal, very expense ($199) but I will look into the plastic ones from Rockler. In addition, having the flexable hose stiffer until it clears the top of the spindle motor housing is key too!
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cyh
New Member
Posts: 11
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Post by cyh on Jun 9, 2019 20:43:29 GMT -5
I was wrong with Rockler on the purchase of the 4" plastic ball joint, it was Woodcraft for around $13.
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johnb
Full Member
New owner @ March 2019, AR16 Elite, Aspire, 4th Axis & Laser
Posts: 326
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Post by johnb on Jun 10, 2019 7:16:59 GMT -5
If you were to...say...mimic the design of the Axiom overarm collector...there would be no swivel in the hose. I don't think that it's theoretically possible for the spindle (fixed to the gantry) to "tie the hose in a knot". Your distance above the table (on which your fixed duct would be centered) is a factor of the maximum travel of the spindle away from that midpoint. The higher you go, the more weight (of the hose) the machine is dragging around, but you don't want it to be so short that is stressing (or tensioning) the hose at the point of maximum distance. www.axiomprecision.com/accessories/dust-shoes/axiom-overarm-dust-system.html
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Post by fsperring on Jun 10, 2019 7:36:54 GMT -5
If you were to...say...mimic the design of the Axiom overarm collector...there would be no swivel in the hose. I don't think that it's theoretically possible for the spindle (fixed to the gantry) to "tie the hose in a knot". Your distance above the table (on which your fixed duct would be centered) is a factor of the maximum travel of the spindle away from that midpoint. The higher you go, the more weight (of the hose) the machine is dragging around, but you don't want it to be so short that is stressing (or tensioning) the hose at the point of maximum distance. www.axiomprecision.com/accessories/dust-shoes/axiom-overarm-dust-system.htmlI agree John B, It's going to be a little trial and error on the height of the fixed pipe to the length of the flexible hose. I have looked at the Axiom overarm collector and was hoping it had dimensions but none are listed. I going to start closer to the table center with the fixed pipe and then shorten it to find the right weight to drag ratio. Thank you for you response.
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