Basics of the LEGO Power Functions Servo Motor (88004): why does it exist? [English|HD]

The LEGO Technic Power Functions System had a special motor: the servo motor. It was a special motor only beeing used for steering. But why do we need a special type of motor for steering?
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[@musoseven8218]

Great video, clever stuff👍😊
I'm new to this, but wondered if I could use the servos in the garden to control railway points?
Any thoughts or ideas gratefully received 👍😊🤞

[@patrickdemets6018]

Thanks for the very informative video. I know the PF servo motor is only used in 3 sets. I will soon have 9398 4x4 Crawler. If a power supply WITHOUT variable voltage is used, is there any way to rotate the servo to other than +/- 90 degrees? If not, I suppose that's a hard steering (all or nothing). I'll know soon enough when I receive my 9398, which is controlled via IR Receiver (V2), but the remote controller does not have variable position, so it's the same problem. Perhaps it's time to just move on to Powered Up...

[@technicmaster0tutorials]

You can only use 3 positions with the "normal" non-train remote.

[@theperson6167]

I need the new version of this

[@SuperCougar1963]

Hi, very informative. I have a question is it possible to have more than one Tech hub connected to one project eg: eight motors

[@technicmaster0tutorials]

You mean one project in the powered up app? If so: yes. You can check out part 11 of my powered up tutorial series if you want to see how.

[@SuperCougar1963]

Thank you I have gone and checked it out, I did a test run and got them working

[@technicmaster0tutorials]

Good to hear :)

[@user-qs5hs4zu8e]

Hello,
IS it possible to change the rmp of the servo motor?

[@technicmaster0tutorials]

Do you mean the rpm (rotations per minute)? If so, then no - at least not without destroying the case

[@jinipworld3804]

Can we operate or give power to 88004 through 8884 with remote control ?

[@technicmaster0tutorials]

yes

[@markperkins2821]

How can I make a lego motor turn 360 degrees every time and stop in the same place?

[@technicmaster0tutorials]

You would either need a powered up motor or something like a touch sensor. Otherwise the motor doesn't know "where it is".

[@yiezhezactam5520]

What is this app name

[@technicmaster0tutorials]

You mean the app that I showed in the last part? That's the powered up app

[@markperkins2821]

Power function