Same servo and same PWM but diff angles

Discussions relating to development and use of the OpenServo hardware.

Moderators: jharvey, Secondary Admin, Admins

Post Reply
Power_user_EX
Posts: 1
Joined: Tue Nov 03, 2009 8:19 pm

Same servo and same PWM but diff angles

Post by Power_user_EX » Thu Nov 05, 2009 6:16 pm

Hi guys , i have just received my 20 Futaba S3003 servos for my hexapod from ebay hong-kong. But i doubt if its original coz when i give the same PWM to all the servos some of them run out of sync , which is that a few (2 to 4) servos will never come to the same position like the rest. So what could be the prob with some of these servos. :?

Also the PWM range is sort-of wiered.

for 3ms it comes to 0 degs ,
for 9 ms it comes to 90 degs
and for 1.6 to 1.7 ms is comes to 180 degs.

So , could the potentiometers be the culprit ? Can i make more accurate by changing the Pots ? :?:
My brain ain't working anymore - can't invent new phrases to write as my sig ;-() ...

mog123
Posts: 12
Joined: Sun Jun 07, 2009 5:32 pm
Location: Poland

Post by mog123 » Tue Dec 08, 2009 11:29 pm

A standard servo signal ranges from 1,0 to 2,0 where 1,5 is center position.
Most producers dont use the standard signalling but their own, i.e. a TowerPro servo can go from 0,5 to 2,3 as I recall.

Post Reply

Who is online

Users browsing this forum: No registered users and 0 guests