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Old 06-11-2012
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V6Jim V6Jim is offline
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Join Date: Apr 2010
Location: Dumfries, SW Scotland.
Posts: 389
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Took delivery of a new servo yesterday. I was pretty sure that the Alturn servo I had was a bit rubbish, so I splashed out and bought a Hobbyking HK47111DMG from the UK branch of HK. What a fantastic range of stuff they have at pretty seriously cheap prices. This one was $37. (£24)

This servo is quite highly regarded in the US, so I thought I'd try it. Here's the blurb:

The HK Mi Series servos represent the next break through in high precision servo technology. Using Magnetic Induction, rather than a potentiometer, for an unsurpassed level of accuracy and performance.
Specs:
Voltage: 4.8v / 6v
Speed: 0.08sec / 60deg (4.8v) - 0.07sec / 60deg (6v)
Torque: 9.70kg.cm (4.8v) - 11.8kg.com (6v)
Size: 40.2mm x 20.1mm x 39.2mm
Weight: 61g
Gear Train: Full Titanium Alloy
Motor: Coreless

Mi : Magnetic Induction, uses a Magnetic Rotary Encoder in place of a traditional potentiometer (invented in 1877). Magnetic Rotary encoders have a longer life and suffer less wear.


Super fast, torquey, quiet and smooth. Well, I say 'quiet' it actually runs quietly, but when at rest it chitters away like a chipmunk!

Anyway, it's light years better than the Alturn.

Doing a bit of diff oil experimenting. I'm changing the rear 3K oil for 7K oil. I think that may make it better under full power.

Jimmy
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1985, 1986 & 1987 Scottish 1/10th Off-Road Champion.

Re-started 2012. With Caster SK10
Driving Xray XB4 & Precirotate PRS1 V2 for 2014.
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