Hello, Im new to Antbots
Moderators: BeligerAnt, petec, administrator
- BeligerAnt
- Posts: 1872
- Joined: Wed May 15, 2002 12:00 am
- Location: Brighton
- Contact:
Yes, that will work.
Even if using the commercial "servo extender" it is advisable to remove any mechanical stop in the servo.
Also worth mentioning that it's best to choose a servo with a complete final gear, unlike the HS-81 in the example.
2.2k resistors should give around 180 degree rotation, 2k or 1.8k will give slightly less.
It's worth checking that the pot' in the servo will rotate 180 degrees before starting this mod'. I have never come across one that doesn't, and it's pretty unlikely, but best to make sure...
Even if using the commercial "servo extender" it is advisable to remove any mechanical stop in the servo.
Also worth mentioning that it's best to choose a servo with a complete final gear, unlike the HS-81 in the example.
2.2k resistors should give around 180 degree rotation, 2k or 1.8k will give slightly less.
It's worth checking that the pot' in the servo will rotate 180 degrees before starting this mod'. I have never come across one that doesn't, and it's pretty unlikely, but best to make sure...
Gary, Team BeligerAnt
- Simon Windisch
- Posts: 1806
- Joined: Tue Apr 15, 2003 12:00 am
- Location: Reading
- Contact:
Gary is of course quite right but I have a servo tester that tells me the length of the pulses and from memory they don't actually go anywhere near 1000ms or 2000ms, more like 1200-1800ms, but the servos do respond to signals outside this range even if transmitters don't usually send them, so perhaps a servo extender would "translate the pulse length"? I'll bring it on Saturday so you can see when I mean.
- BeligerAnt
- Posts: 1872
- Joined: Wed May 15, 2002 12:00 am
- Location: Brighton
- Contact:
The servo extender would work, but adds weight to the robot
The resistor mod is quite simple and much smaller, lighter and cheaper than the commercial solution.
In fact, I think the resistor mod is a "better" solution as it doesn't push anything outside of the published R/C control signallling specifications.
Edit: Just remembered I did come across a servo that started to behave strangely when the control pulses got close to 1000 or 2000ms. (Possibly only one end, I can't remember) Probably why most transmitters stick to 1200-1800ms. Another reason to use the resistor mod'
The resistor mod is quite simple and much smaller, lighter and cheaper than the commercial solution.
In fact, I think the resistor mod is a "better" solution as it doesn't push anything outside of the published R/C control signallling specifications.
Edit: Just remembered I did come across a servo that started to behave strangely when the control pulses got close to 1000 or 2000ms. (Possibly only one end, I can't remember) Probably why most transmitters stick to 1200-1800ms. Another reason to use the resistor mod'
Gary, Team BeligerAnt
- joey_picus
- Posts: 1137
- Joined: Tue Jan 13, 2009 1:51 pm
- Location: Lancaster, Lancashire
- Contact:
It did look a lot better than I thought in person, you've built a very very nice robot there Jon was good meeting you as well.
Did you work out why the motor had stopped or was it just a random glitch? Shame it didn't get to fight in the main event
Did you work out why the motor had stopped or was it just a random glitch? Shame it didn't get to fight in the main event
Joey McConnell-Farber - Team Picus Telerobotics - http://picus.org.uk/ - @joey_picus
"These dreams go on when I close my eyes...every second of the night, I live another life"
"These dreams go on when I close my eyes...every second of the night, I live another life"
Yeah but as we were all leaving the second receiver failed.. And exactly the same way.. Only moved forwards and backwards no left or right.. Then stopped all together.. So now I am really confused.. Because if 2 receivers did the same thing I thought its down to the receiver..it defiantly didn't short out this time.. As it was completely covered with insulation