Author Topic: hitec servo maximum angle  (Read 4877 times)

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Offline RebelgiumTopic starter

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hitec servo maximum angle
« on: March 18, 2008, 01:29:40 PM »
What is the maximum angle the Hitec HS422 and 322 ? And why is it so damn hard to find this info? :-\
For futuba servo's it's just in the datasheets, but for Hitec it's not that clear... It sais "45 /ONE SIDE PULSE TRAVELING 400usec"

here's a link to a Hitec datasheet:
http://www.robotwinkel.nl/pdf/Manuals/Servo_Drivers/hs422.pdf

« Last Edit: March 18, 2008, 01:36:46 PM by Rebelgium »
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Offline airman00

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Re: hitec servo maximum angle
« Reply #1 on: March 18, 2008, 02:05:35 PM »
Luckily for you I have both of those servos. They go 90 degrees per direction
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Offline RebelgiumTopic starter

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Re: hitec servo maximum angle
« Reply #2 on: March 18, 2008, 02:08:52 PM »
Quote
90 degrees per direction
so that's 180 total?
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Offline pomprocker

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« Last Edit: March 18, 2008, 05:00:57 PM by pomprocker »

Offline airman00

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Re: hitec servo maximum angle
« Reply #4 on: March 18, 2008, 05:05:01 PM »
I looked it up for you:

http://www.servocity.com/html/hs-422_super_sport_.html



http://www.servocity.com/html/hs-322hd_standard_deluxe.html





thats what it says on the website , but in actuality it is not 45 degrees but 90 degrees per way

180 total, yes
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Offline pomprocker

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Re: hitec servo maximum angle
« Reply #5 on: March 18, 2008, 05:31:18 PM »
for which servo? we should do them a service and contact them in their error.

Offline paulstreats

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Re: hitec servo maximum angle
« Reply #6 on: March 18, 2008, 05:57:04 PM »
They already know. Its down to the precision of the pot on the board. It has a decent enough precision through the 45 degree angles to pretty much guarantee your precision, but using them at 90 degree angles cant guarantee their precision. I noticed this with pots, they seem to have a sweet spot area where they return an exact value, but too far near the high or low end and the output jumps between 2 or 3 values

Offline benji

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Re: hitec servo maximum angle
« Reply #7 on: March 19, 2008, 09:18:24 AM »
do you mean that making the servos turn to more than +45 -45 makes unprecies motions?
i did expirement with this servo and here is what i precisely got

-90 == 0.69 ms
0  ==  1.515 ms
+90 == 2.385 ms

and as you can see it doesnt make a perfectly  straight line equation, i dunno whats wrong
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Offline benji

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Re: hitec servo maximum angle
« Reply #9 on: March 24, 2008, 12:23:02 PM »
you just need to expirement with your own servos,,
here is what you have to do
give known pwms and write down the angles you get,then try to find the function of angle=function(pwm);
if you really wanna get precise you wont get a straight line equation
good ol' BeNNy

 


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