Need help understanding spindle specs

[Chelmite]

I have a shopbot desktop with an HSD spindle.

The spec plate has two sets of numbers for the HP for 3 sets of speeds:

For example for 200 Hz /12K rpm:
hp 0.88(1.15)

What are the two hp numbers?

Thanks,
Chelmite

[Brady Watson]

1.15 hp = @ .86 Kw

-B

[Chelmite]

Here's the full table:

[CODE]V(+-10%) 220 220 220
Hz 200 250 300
rpm 12000 15000 18000
kW 0.65(0.85) 0.65(0.85) 0.50(0.60)
Hp 0.88(1.15) 0.88(1.15) 0.74(0.97)
A 3.2(4.2) 3.2(4.2) 2.6(3.4)[/CODE]

So, I get that there are two sub-columns for 200Hz, but what distinguishes the two sub-columns? I can't choose 3.2A over 4.2A, can I? Does the difference have something to do with 60Hz vs 50Hz for the power main? If so, which column is which?

Thanks

[Brady Watson]

Yes, I believe that is a 50/60Hz (line input freq) difference between the numbers.

What number does the VFD display when you crank the speed dial all the way to the right? 250? 15000?

-B

[Chelmite]

It says F300 when cranked up fully.
So, if that's for 50/60Hz, which number is for 60Hz, the number in parentheses or the number outside the parentheses?

[ssflyer]

Damn, I have to look it up. There is a setting in the vfd to display rpm...

[adrianm]

From the docs it looks like each 100 on the desktop display is 6000rpm so F300 should equate to 18,000 rpm which sounds about right as the maximum speed of the spindle to me.

[scottp55]

I keep this right next to spindle.

[Chelmite]

I get the relationship between the Fnnn display and the rpm (multiply by 60). What's the difference between the numbers on the spec plate that are inside parentheses and the number in front of the parentheses? (See table above.)

[Brady Watson]

F300 should equate to 18,000 rpm which sounds about right as the maximum speed of the spindle to me.

Yes - It is...18,000 Max. Ignore the nameplate on the spindle, which says 200Hz etc. This was a small oversight since that little spindle is used in other applications where for safety reasons, the RPM needs to be limited/de-rated to 12,000 RPM max. It is good to 18k so no worries.

-B