Which speedsetting is which speed?

[Tuningfreak]

Hi guys. I read now a lot of threads and hints here about the DAP, speed settings and pressure. I couldnt buy the PC in germany, so I bought a similar product from a german company, also a real good and expencive tool...

Now I want to know, which speed setting on PC is which speed! my machine has a speed adjustment betweek 3000 und 6000 rpm, the PC has 2500-6000 rpm. I only want to be sure that I use the same speed setting with my machine, I can set speed from 1 up to 6, maybe its the same with the PC?

Thanks for help!

[the other pc]

Since the machines are different it's not possible to say exactly what speed settings are equivalent (and nobody seems to know what speed the G100 actually runs for a given dial setting, everybody just goes by dial setting).

The specs for overall performance are pretty close so maybe the settings would be somewhat similar but again, it's impossible to say. With the G100 you polish at setting 5 (about 80% of maximum) and wax at setting 3 (about 50% of maximum) so you might want to start near there and play with it.

Good luck


PC.

[GSKTech]

Well, I could be wrong...but here is what I figure...

2500 #1
3200 #2
3900 #3
4600 #4
5300 #5
6000 #6

If the PC starts at 2500 rpm
and ends at 6000 rpm

You subtract the higher speed from the lower to get the actual speed difference. (3500)

Now divide that by the number of speed settings (5)
N.B we dont count the first one.

That gives us 700 rpm for each number setting.

[Mike Phillips]

Remember, the G100/PC is an orbital tool, not a rotary buffer, so whenever you describe or speak of speed settings, you need to refer to OPM, (Ocillations Per Second), not RPM, (Revolutions Per Second).

Going out into your garage with some of the recommendations given here and spending some time with the tool will be your best guide as the power your tool has and the clutch operation will greatly afffect the performance of the tool and these two factors appear to be the primary differences between all of the different orbital tools on the market.

[the other pc]

Originally posted by GSKTech
.....but here is what I figure…
…You subtract the higher speed from the lower to get the actual speed difference…
…Now divide that by the number of speed settings …

That’s assuming a linear response from the speed control circuit, which isn’t the case with many (most?) power tools. As with many electric controls the speed vs. setting response of my rotary buffer closely follows a logarithmic curve. The G100 and Tuningfreak's polisher easily could as well.

Not that assuming a linear response will be all that far off, even if it is logarithmic.

As Mike points out, the power of the tool will have a dramatic effect on how fast it will move when you actually press it against a finish.


PC.