[MOC] METER - rebrick.com superbots

[Jurss]

Posted to rebrick.com, so also details here

Final model

Details in 4th reply

Finally decided what to build for lego official contest.

It will be distance counter - automatic, as it is about some automation.

Started with 3 level counter - cm, dm and m. First level is continious, other to discret with 10 steps.

Edited July 3, 2017 by Jurss

[Jim]

Interesting. Looking forward to seeing your progress.

[Jurss]

Counting mechanism took 3 evenings, but today was good progress for main frame (didn't had to work today ...)

It will be 1 meter long, as it will be technic meter.

I want that mindstorms so much ...

[Jurss]

Almost ready

[Jurss]

I named it METER - because it measures distance and it is one meter long.

Final version of counting mechanism

It has 4wheel drive

From here (from one yellow gear to two gears - 1st to front wheels, 2nd to counting mechanism)

(very long axle between) to front

Easy access to batteries. Between them it is possible to see coupling (also part from long axle to front) to switches from front bumper, which reverses the whole thing, when it hits some obstacle.

Front bumper most extended

Here it is possible to mechanism (black gears), which makes connection to counting mechanisms, when robot goes forward and needs to count distance. When it goes backward, counting mechanisms is disconnected, and it does count the distance.

On top of it is dial made from paper (rebrickadmin approved), to read distance. To make it form LEGO - it is almost impossible at this scale

And METER in action

 

 

[BusterHaus]

Excellent work!  Any chance of showing the reversing mechanisms in action?  It seems very quick and effective.

[Jurss]

Reversing mechanisms is really simple. Front bumper is directly connected to battery switches. When it is needed to measure, bumper is extended, so the switches are in one position, when the METER hits some obstacle, bumper is hit and compressed, then battery switches switch to other side, and also polarity is switched, so the motors are turning now in other direction. There is no gearbox.

All green marked part is switch

[mocbuild101]

Very interesting, but don't you think it should be called M3T3R? (or MET3R)

I like how you made it without any mindstorms!

Edited July 4, 2017 by mocbuild101

[Jim]

24 minutes ago, mocbuild101 said:

Very interesting, but don't you think it should be called M3T3R? (or MET3R)

It's not an EV3 MOC 

[Jurss]

Yes, I'm planning to get it trough that contest 

[MangaNOID]

Love it if it's accurate.

but I think it should have a GBC fitted to it to count the meters in balls instead of what you have 

[mocbuild101]

2 hours ago, Jim said:

It's not an EV3 MOC 

Oh, oops! 

I really don't know how I made that mistake!

[Jurss]

1 hour ago, MangaNOID said:

Love it if it's accurate.

Of course, it is not Class 1 accuracy, but i calculated the distance for one turn of the wheel, then made necessary gearing, so that first indicator makes one turn, when wheel makes 10cm distance (this class wheel has circumference close to 30cm, so I need 1:3 gear ratio). All others have downgear 1:10 . 1:10 is combined, and they are discrete indicators, nonlinear. First is linear.