I thought it was 4 oz... which would make it weigh 113 grams...
I think...
Does that change the weight/mass result?
====================== James -K8JHR =====================
On 4/10/2010 7:55 PM, James Viars wrote:
> 4 solid oz
=========================================================
On 4/12/2010 9:36 AM, David Goncalves wrote:
> Just to waste some time at work, I pulled up the manual for the Jupiter. The
> Encoder is just listed as 'HRPG Encoder' with no further infomation. When
> searched in google, I pulled up a datasheet from Agavo, which seems to be
> the spin-off of HP/Agilent. For the common type Agavo makes, they have a
> maximum radial load of 0.1 N-m. If I understand the specification correctly,
> radial loading is the 'cantilevering' I was talking about, and axial loading
> is INTO the encoder along the axis of the shaft. Perhaps I'm wrong. But if
> I'm not, and the encoder has a shaft length of ~1.27 cm, and the center of
> mass of the knob is also the geometric center and that point is about the
> midway point of the shaft, then 0.1 N-m / .0127 m / 2 = 3.93 N ~ 400g. Hope
> that's right. A Jupiter knob looks like 4.5 cm diameter, 1.5 cm thick,
> density of aluminum is 2.7 g/cm3, making an aluminum knob ~65
> grams. Assuming all that was close to right, then it seems that putting in
> an aluminum knob would be OK.
>
> David Goncalves
> W1EUJ
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