How-To: Modify Hitec HS-55 for Continuous Rotation

A video detailing how, without any electrical modification, you can convert a Hitec HS-55 servo from a traditional servo to a continuous-rotation motor, whose speed is controlled by servo pulses.

Category:

Science & Technology

Tags:

• robotic
• servo
• motor
• instructables

[tokamax238]

Thanks! Works great, though I think the pot axle keeps moving slightly off center, making motor spin again - do you have a good way to secure pot axle - crazy glue?

[AronFigaro]

@tokamax238 Crazy glue, hot glue, epoxy, they'll all do the job decently. I find this is less of an issue on the hs-55s, but if you're modding other servos such as Hextronik servos (which I have found are cheaper and better than the hs-55s) you'll need to do this. I may post a tutorial on those later.

[tokamax238]

does this mod allow change in direction?

[AronFigaro]

@tokamax238 Yes it does, it will respond left or right depending on which direction the pulse is in, as long as the pot was centered before you modded.

[andres24gomez]

so this servo does work for my crawler

but would i have any problems with my car board

[AronFigaro]

@andres24gomez Servos are servos. There's not much difference between a Hitec and a T-Pro for example, with the exception of performance. Interface-wise they're pretty much all the same.

[andres24gomez]

could you do a tutorial in the future?

because i am comfuse everytime i see 3 wires with different color

were as the xmods have one red and one black showing one positive and one negative

p.s well i see that you know a lot about electronics maybe you should make a video showing all the basics on it. you got another subscriber

[AronFigaro]

@andres24gomez All sorts of stores sell the Hitec HS-55, including big chains like Tower Hobbies, and electronics places like RobotShop.

If you're asking if you can use it as a drive motor for xmods, you're not going to get anywhere near enough power out of the gearing on those servos. After doing a bit of reading it looks like some people do high-torque mods for things like rock crawling: you can use these servos for that, yes.

[AronFigaro]

@brennant74 Only the speed. You're effectively removing the mechanical part that lets you control the angle.

[andres24gomez]

could i use for xmods?

where do they sell this servo at?

please answer back

or could you sell it to me...

thanks