Are there any diseqc motors, that are radically faster than competitors?

BombedOne

A lot of people complain that motors are too slow to move. Personally I've compared several brands and found almost all have same speed. But are there any exclusions, which perform at least 2x faster than generic ones?

dasteelman

good question...I am interested in this one

Nice but Dim

rolfw

When using all of the ones I've tested on Horizontal frequencies, there is little to tell between them on a 40 degree sweep (I normally send it back from 42E to zero after testing the arc).

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dasteelman

We all have our stange habbits to speed up things on our motors..when I am west of 28e on the arc, I always use bbc News on 28 e to get me back quickly

Nice but Dim

satelliteman

Stab HH 100/120 found to be a bit slower in movement over the Moteck/TM - my pennies worth

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Tivù

It's unlikely that an appreciably faster DiSEqC Motor will ever appear, owing to the restricted ability of modern receivers to provide "oomph".

The current available for supplying a Motor is around 400mA and to increase that would require fundamental and widespread changes to include meatier power supplies in Receivers - and with the continued move towards miniaturisation, that just won't happen.

Even if the gearing were altered to make the rotational speed faster, the downside would be loss of torque and perhaps reluctance to even get going at all when Dishes towards the maximum allowable size are in use.

BombedOne

I've seen some homebrew projects - people add external power supply to motor, and it works much faster. Just curious, if any manufacturer produces such unit.

Huevos

Always use a horizontal transponder to move the motor. Quicker than vertical due to the higher voltage.

wod

maybe if you want speed just use a 36volt motor instead with a vbox

Huevos

Wod, I don't think there is a lot in it. Have you ever tried a side by side test?

I think the best thing for the impatient is to add a few static dishes for the most used satellites.

Oh, and one other thing I do is always edit my channel lists so the dish only goes in one direction. This speeds things up when the missus is in charge of the remote as she has to see what's on, on every single channel.

Trust1

I've made one (Moteck SG 1200) , but not to go faster , but because my old Nokia 9500 could deliver enough power and restart again moving on Hor. TP's.
So I feed it with separate 15 V , easy to make because there are 2 relay for the motor .
A Stab is doing it electronically .
Given it higher voltage , brought the problem of overshoot , didn't stop on the right moment and than adjust it backwards .

Attached Thumbnails

 

My soldering iron is smoking all the time .

Gr. Trust1

BombedOne

I know all thing about horizontals and positioners/vboxes

The question was about diseqc motor (1.2 protocol, USALS), which can be at least 2 times faster, than generic stock models (I'm not asking HOW, they may have additional power supply).

Huevos

Dude, that's not going to happen. There is only a limited amount of power available from the STB. For this reason the only way to make a motor go twice as fast and only use the same power is to reduce the load, i.e. make a motor that is only rated to carry a 60cm dish. Seeing as the general public would probably not be interested in such a motor it is is unlikely anyone would ever manufacture one.

BombedOne

You'd better read complete post, including this part:

I'm not asking HOW, they may have additional power supply

Huevos

Dude, all Diseqc motors are designed to use the STB as the power source. The STB has about 4 watts available to drive the diseqc motor. That's it. If the motor demands more power than available there will be a voltage drop and the motor would stop moving while offering a dead short to the STB. If the manufacturer were to gear this 4 watt motor to move the dish faster it wouldn't be able to move a larger dish (because when geared to turn the motor stub at twice the speed only half the torque is available). It's as simple as that. Laws of physics apply.

The reason others (not I) have mentioned additional power supplies is so larger power supplies that don't suffer from voltage drop may be used, and also higher voltages (24V for example) may be used to over drive the motor and hence increase it's speed. The problem though of increasing the motor speed/torque is that neither the motor nor the gearbox were not designed for this extra power and so the unit will not last as long.