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Old 06-21-2008, 08:42 AM
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SVD SVD is offline
Join Date: Mar 2008
Location: Kansas City, MO
Posts: 2,555
Default Re: Compressor Queries.

The GRS tools get the pulses via a rotating bit. They require a constant stream of air going past to 'lubricate' the rotor. That's why it's very bad to leave a GRS unit on with no air.

Steve's units don't have that rotor (or the box it lives in) but do need to 'idle' so they also use some air all the time they're on - but not nearly as much.

There's a thread where the amount of air used by each system is dicussed. If I can find it I'll come back and drop a link.

Found it! It's in Post #12 in this thread

Here's the money quote:
Originally Posted by Steve Lindsay View Post
I tested the air flow of the foot pedal Classic and PalmControl. The read out is in ml/minute and we need it in CFM (cubic feet/minute). I used this page to help convert the numbers.

Here are the results:
PalmControl set at 35 PSI
Idle: 38.16 ml/min = .001348 CFM
Full throttle: 4333 ml/min = .153027 CFM

Foot pedal set at 35 PSI
Idle: 569 ml/min = .020095 CFM
Full throttle: 4333 ml/min = .153027 CFM

We can average the idle and full throttle together to discover normal usage.
PalmControl normal usage: 2185.58 ml/min = .077718 CFM
Foot Pedal normal usage: 2451 ml/min = .086561 CFM

The stroke adjustment effects the full throttle flow. The above readings were taken with the Classic stroke adjustment at the longest stroke. Both tools use around 2500 ml/min when set at the shortest stroke at full throttle (at 35 PSI). Therefore for average usage of the tools at a short to meduim stroke setting they are using approx .04 to .05 CFM .

With the PalmControl, the COS 16 gram cartridges get around 20 minutes. The 567gram (20oz) paintball co2 cylinders around 8 hours. How long they last is dependent what you are doing. i.e. if digging deep background cuts, not as long as shading or outlining.

Which was followed by this observation:
Originally Posted by Norsksea View Post
The GraverMach requires a minimum of 1.4 cfm at 45 psi of compressed air. Thats almost 10 times more than Classic at full throttle and 28 times more air than the Classic at it's average usage speed. WOW

Steve :->
(KCSteve in most forums)
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