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Author Topic: Vac-Sys w/ Vacuum Bag?  (Read 1402 times)

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Offline Ster1154

  • Posts: 124
    • WoodEyes Woodworks
Vac-Sys w/ Vacuum Bag?
« on: January 17, 2021, 08:42 AM »
I have a vac-sys and recently had a project that has a bit of veneer on it.  I've scoured the FOG and seen some varying opinions about using the vac-sys pump for vacuum pressing.

I know other vacs (from vacuumpress for instance) have an auto-shut off whereas the Vac-Sys is continuous.  Does this mean it's not ideal for vacuum pressing?  Will it overheat?  Do I just need to monitor the gauges?

I rarely use veneer so I'd like to not have to get another vacuum, but I also don't want to damage the Vac-Sys.

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Offline JD2720

  • Posts: 1199
Re: Vac-Sys w/ Vacuum Bag?
« Reply #1 on: January 17, 2021, 10:35 AM »
I have been wondering about this also.

Here is a youtube video that explains the veneering pump & clamping process using a different brand pump that has auto shutoff.
I would think that you would want auto shutoff, but there are continuous run pressing systems. There are a lot of other veneering videos on youtube.



 
   
« Last Edit: January 17, 2021, 10:41 AM by JD2720 »

Offline Cheese

  • Posts: 8385
Re: Vac-Sys w/ Vacuum Bag?
« Reply #2 on: January 17, 2021, 11:07 AM »
I guess it depends upon how long you intend to leave the object in the vacuum bag. I have no idea what the cure time is for the adhesives you're using but I'd imagine 2 hours or less.

I'd also think/hope that the Vac Sys pump could run continuously for a minimum of 4 hours without being damaged.


Offline Ster1154

  • Posts: 124
    • WoodEyes Woodworks
Re: Vac-Sys w/ Vacuum Bag?
« Reply #3 on: January 17, 2021, 11:39 AM »
That was kind of what I figured.  I wouldn't let it run overnight, but I don't think 2-3 hours would harm the machine considering it's a continuous pump.

Offline StanB

  • Posts: 559
  • I like building stuff with my hands.
Re: Vac-Sys w/ Vacuum Bag?
« Reply #4 on: January 18, 2021, 12:03 AM »
I use my vac Sys for vacuum pressing. Works well. I just used the ct to draw the bulk air out. Joe woodworker is a good site for info.

https://www.joewoodworker.com/docs/vacuumpresschart.pdf



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Offline JD2720

  • Posts: 1199
Re: Vac-Sys w/ Vacuum Bag?
« Reply #5 on: January 18, 2021, 08:22 AM »
Thank you Stan. That is great news. What is the connector you have connected to the pump. Does it connected to the OEM pump connector?  I am in the process of building a VAC SYS cart & wanting to add some quick connections.

Offline Don T

  • Posts: 2046
  • Phoenix, Az
Re: Vac-Sys w/ Vacuum Bag?
« Reply #6 on: January 18, 2021, 05:03 PM »
I asked this question to Festool when the Vacuum pump came out and they said it t was a continuous duty motor so there would be no problem. Although I have not actually tried it as yet.
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Offline JRD

  • Posts: 9
Re: Vac-Sys w/ Vacuum Bag?
« Reply #7 on: January 18, 2021, 06:48 PM »
Once you suck the air out of your bag and you if don't have any leaks you should be able to turn your vacuum off. You need a gauge to know that you have reached 26 Hg of vacuum for adequate pressure on you veneer.   

Offline Michael Kellough

  • Posts: 5149
Re: Vac-Sys w/ Vacuum Bag?
« Reply #8 on: January 18, 2021, 09:22 PM »
It should be okay but I don’t like the idea of running for hours when not needed. I wonder if you could plug the vac-sys into a timer so it runs a few minutes every half hour?

Offline PaulMarcel

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Re: Vac-Sys w/ Vacuum Bag?
« Reply #9 on: January 18, 2021, 09:56 PM »
It should be okay but I don’t like the idea of running for hours when not needed. I wonder if you could plug the vac-sys into a timer so it runs a few minutes every half hour?

That wouldn't be a bad idea. With my bags, the VacuPress will cycle about once an hour. If I were to use the Vac-Sys pump, having a 30-minute off, 2-minute on cycle would likely keep it pressed like the VacuPress.
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Offline StanB

  • Posts: 559
  • I like building stuff with my hands.
Re: Vac-Sys w/ Vacuum Bag?
« Reply #10 on: January 18, 2021, 10:25 PM »
When turned off the pump it held pressure fine. I had the pump going for about an hr here. Better bond veneer glue sets up pretty quick. Using Home Depot husky high flow air fitting for the pump end and veneersupplies.com quick connect fitting for the bag.
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Offline Cheese

  • Posts: 8385
Re: Vac-Sys w/ Vacuum Bag?
« Reply #11 on: January 18, 2021, 11:20 PM »
Just throw a check valve in-line with the vacuum pump. Put the pump on a timer that cycles every  30 minutes for 2 minutes. You’ll be golden.

If the leak down rate is faster than 30 minutes, then you need to address that situation.

Offline Michael Kellough

  • Posts: 5149
Re: Vac-Sys w/ Vacuum Bag?
« Reply #12 on: January 18, 2021, 11:37 PM »
Check valve. Good suggestion!

Offline JD2720

  • Posts: 1199
Re: Vac-Sys w/ Vacuum Bag?
« Reply #13 on: January 19, 2021, 07:13 AM »
I believe the Festool pump already has a check valve.

Offline StanB

  • Posts: 559
  • I like building stuff with my hands.
Re: Vac-Sys w/ Vacuum Bag?
« Reply #14 on: January 19, 2021, 01:17 PM »
OF1010 EQ Router | MFT/3 | DF500Q | Mafell P1CC | ETS EC 150/3 | CT 36 Auto Clean | TSC55 | LR32 | OF1400 EQ Router | ZOBO Metric Set | CXS Li 2.6 - 90 Limited Edition | Universal Cleaning Set | HKC55 | Centrotec CE-SORT | RO150 FEQ | DTS 400 | RO90 DX | CTSYS | C18 Drill | SysLite KALII | Syslite STL 450 | RAS 115 E | OF2200 EB | OSC 18 Vectoro | VAC SYS SYSTEM SET | MX 1200 E MIXER | DF700 XL | PDC 18 | TID 18