Timeline for How to create a LEGO Technic tank steering system
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
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| S Sep 5, 2016 at 2:40 | history | suggested | user275517 | CC BY-SA 3.0 |
added more details to the answer
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| Sep 5, 2016 at 1:28 | review | Suggested edits | |||
| S Sep 5, 2016 at 2:40 | |||||
| Aug 31, 2016 at 19:33 | comment | added | TLW | @user275517 - At one point I was part of an (informal) competition to see who could build a robot to drive in a (relatively large) pentagon and return to the start most precisely. 'Twas fun, but I ran into this problem at first. | |
| Aug 31, 2016 at 19:30 | comment | added | TLW | @user275517 - With a dual-differential drive, there's generally enough friction that it will indeed drive "exactly" straight when the drive motor is on - and if it doesn't you can just add a bit of friction (e.g. clamped bushings around a stud) to the control motor to make it drive straight. | |
| Aug 31, 2016 at 19:29 | comment | added | TLW | @user275517 - "pain" in the sense that, without feedback, it's unlikely that both motors will be driven at the exact same speed. Variations in the build (e.g. how tight bushings are) and the motors (torque curves) means that it'll generally drive in a (large) circle unless you actively correct for it. You can make it relatively straight, but it involves a lot of fiddling with loosening / tightening parts, and even then you'll often find that it no longer drives straight on a different surface. Hence, "pain". | |
| Aug 31, 2016 at 1:31 | comment | added | user275517 | @TLW, is it possible to let me know what type of pain you are referring to? | |
| Aug 31, 2016 at 1:30 | vote | accept | user275517 | ||
| Aug 24, 2016 at 15:15 | comment | added | TLW | Note that it can be a pain to ensure that the tank actually drives straight with the 2-motor system. | |
| Aug 15, 2016 at 13:37 | history | answered | Josh King | CC BY-SA 3.0 |