Air Assist - Compressor Size?

If you have made Upgrades and/or Modifications to your machine, let us know about them here.
Post Reply
Eric Adams
Posts: 36
Joined: Mon Feb 11, 2019 9:00 am
Location: Decatur, TX
Country: United States
Nickname: Eric
Laser Machine Make or Type: BESCUTTER VERSA
Laser Power: 150W
Laser Bed Size: 52" X 36"
Home Position: TR
Control Software: RDWORKS
RDWorks Version: v8.01.40
Ruida Controller: Other
Windows Version: 10
Contact:

Air Assist - Compressor Size?

Post by Eric Adams »

Hello all - I'm about to upgrade the air assist on my laser and wanted to see what the minimum compressor tank size should be. Right now I'm leaning towards the little vertical 8 gallon "Super-Quiet" NorthStar oil free compressor from Northern Tool. Or perhaps the California Air Tools 8 gallon horizontal aluminum tank on Amazon.

Are these tanks suitable enough in size to power the laser during cutting operations?

Beyond the needs for the laser, I don't run a lot of air-powered tools. My current and only compressor (for my shop) is a 1 gallon Senco PC1010.
Pete Cyr
Posts: 1938
Joined: Sun Nov 27, 2016 5:16 pm
Location: Suffolk Virginia
Country: United States
Laser Machine Make or Type: Boss 1630
Laser Power: 100w
Laser Bed Size: 16"x30"
Home Position: TR
Control Software: RDWORKS
RDWorks Version: v8.01.18
Ruida Controller: RDC6442
Accessories: roller rotary attachment
Windows Version: Win 10

Re: Air Assist - Compressor Size?

Post by Pete Cyr »

Tank size will determine how frequently the compressor cycles/runs.
The CFM rating of the compressor will determine if the compressor can keep up with your use.
5psi supply to you laser head will typically result is 2.5-4 SCFM use of air.
The compressor you listed will generate 4 cfm according to the specs - You could probably run for 1-2 hours before you lost pressure below 5psi at the laser - your compressor would probably run continuously though.
Location - VA
Equipment - Boss Laser 1630
Power - 100W
Laser Bed Size - 16" x 30"
Home Position - TR
Full RDWorks Version - v8.01.18
First name - Pete
Eric Adams
Posts: 36
Joined: Mon Feb 11, 2019 9:00 am
Location: Decatur, TX
Country: United States
Nickname: Eric
Laser Machine Make or Type: BESCUTTER VERSA
Laser Power: 150W
Laser Bed Size: 52" X 36"
Home Position: TR
Control Software: RDWORKS
RDWorks Version: v8.01.40
Ruida Controller: Other
Windows Version: 10
Contact:

Re: Air Assist - Compressor Size?

Post by Eric Adams »

Thank you Pete. Can you elaborate on your "5psi supply will result in 2.5-4 SCFM use of air" comment?

The NorthStar description says it will deliver 4 CFM @ 90 PSI and 5.4 CFM @ 40 PSI. The CFM rating increases as PSI decreases. I'm confused on how only 5 PSI of airflow will max out the compressor's output. They only have a 70% duty cycle for these 'quiet' motors on this style compressor, so running continuously won't be ideal.

Do you have a recommendation for a suitable compressor or pump?
User avatar
Gene Uselman
Posts: 2144
Joined: Thu Jul 07, 2016 3:18 pm
Location: Suburban Minneapolis, Minnesota, US
Country: USA
Nickname: Gene
Laser Machine Make or Type: AKL1318-2
Laser Power: 130W & 80W Reci
Laser Bed Size: 51 x 71
Home Position: TR
Control Software: LIGHTBURN
RDWorks Version: RDw .19 & Lightburn
Ruida Controller: RDC6445
Accessories: I have a combining lenses, pin tables [homebuilt], honeycomb tables , wireless remote, Modifed Ultimate Air Assist, home built non-powered rotary device, Prusa i3 MK3S and Mini Prusa printers.
Windows Version: Win 10 Pro

Re: Air Assist - Compressor Size?

Post by Gene Uselman »

I have been using the Calif Air 4710 [4.7 gal, 1 hp] for a year and have flow gauge as my hearing is impaired, and it works a treat, quiet and enough air to blow off debris when needed .
If the Help and advice you received here was of VALUE...
Please consider making a donation to maintain the RDWORKSLAB Forum.

BT48 Alpha Shopbot and 1300x1800 130W Laser

The days that I keep my gratitude higher than
my expectations, Well, I have really good days.

Ray Wylie Hubbard
Pete Cyr
Posts: 1938
Joined: Sun Nov 27, 2016 5:16 pm
Location: Suffolk Virginia
Country: United States
Laser Machine Make or Type: Boss 1630
Laser Power: 100w
Laser Bed Size: 16"x30"
Home Position: TR
Control Software: RDWORKS
RDWorks Version: v8.01.18
Ruida Controller: RDC6442
Accessories: roller rotary attachment
Windows Version: Win 10

Re: Air Assist - Compressor Size?

Post by Pete Cyr »

LOL . What a rookie error. You are correct. I failed to account to the change in capacity with a lower line pressure. I locked in on a 4 cm flow rate and did not pay attention to 90psi.

The flow through an oriface at 5 psi with a pressure drop to 1psi assuming an oriface size approx 0.2 will be about 3.5 -4 scfm
Location - VA
Equipment - Boss Laser 1630
Power - 100W
Laser Bed Size - 16" x 30"
Home Position - TR
Full RDWorks Version - v8.01.18
First name - Pete
Brian Book
Posts: 59
Joined: Sat Dec 03, 2016 10:59 am
Location: Burlington, Ontario Canada
Country: Canada
Laser Machine Make or Type: Rayfine
Laser Power: 80W
Laser Bed Size: 24" x 16"
Home Position: TL
RDWorks Version: v18.01.18
Ruida Controller: RDC6442
Accessories: Chuck Rotary
Windows Version: 10

Re: Air Assist - Compressor Size?

Post by Brian Book »

Hi .... I have the 10 gal. California Air Compressor .... it keeps up at 40 psi continuously .... a great quiet compressor.

Brian
Ray Fine 80w 6040 110v TL
Chuck Style Rotary
RDWorks 8.01.18
Corel Draw 6

Brian
Post Reply

Return to “Upgrades and Modifications”