Print

Print


Just a recommendation, but I would be careful about adding additional
rubber bands or different parts to this mission model. This mission
model is specifically designed to react in two different ways:

*         If you push too fast (high force), the model will "lockup" and
not raise the weight (and you will not score the points).

*         If you push slowly enough (low force), the model will raise
the weight (and you will get the points).

 

This is why this mission is one of the few that tells you how you must
interact with the mission model:

 

ROBOTIC SENSITIVITY

It takes a lot of sophistication and therapy for an artificial hand and
its user to find the correct angles for the many

pivots and extensions of movement, but what about the forces? It takes a
lot less force to grip a sandwich than a

rock... What about handling eggs - or kittens? How is the correct force
found?

MISSION - Get the weight to the up position by pushing the blue panel
only.

WEIGHT ALL THE WAY UP = 25 Points

Reference:
http://firstlegoleague.org/uploadedFiles/Challenge_Specific/Body_Forward
/Body%20Forward%20-%20Missions.pdf

 

 

Model Setup
(http://firstlegoleague.org/uploadedFiles/Challenge_Specific/Body_Forwar
d/Body%20Forward%20-%20Field%20Setup.pdf)

"Be sure the rubber belt runs only in the groove of the gray half-bush
(tiny pulley). The belt must not be allowed to rub on the blue beams nor
the tan cross-axle. The more friction there is in this model, the easier
the mission seems - so be sure you're practicing with a properly
maintained model, because they're likely to be correct at tournaments."
See the picture in the link above to see the correct routing of the
elastic band.

 

Bill

 

From: First Lego League in Virginia and DC
[mailto:[log in to unmask]] On Behalf Of John Busic
Sent: Tuesday, October 12, 2010 11:33 PM
To: [log in to unmask]
Subject: EXTERNAL:Re: [VADCFLL-L] problem with pressure sensing model

 

We had a similar problem and we fixed it by adding a second rubberband
to the model.

	----- Original Message ----- 

	From: Robert and Ann Henshaw <mailto:[log in to unmask]>  

	To: [log in to unmask] 

	Sent: Tuesday, October 12, 2010 6:45 AM

	Subject: [VADCFLL-L] problem with pressure sensing model

	 

	My team crashed the robot into the side of the pressure testing
model. Now, the model can no longer lift the weighted arm even when very
lightly pushed by hand. I have pushed all the pieces together to ensure
connections are tight. I suspect that the rubber band may have stretched
out a little bit, so there is not enough friction. Has anyone else had
this problem? Any suggestions for fixing it? Is there any way of
checking that the model performs properly (i.e. what are its proper
performance specs)?

	 

	Thanks

	Bob Henshaw

	Home based team: "Dr Dangerous"

	 

________________________________

	To UNSUBSCRIBE or CHANGE your settings, please visit
https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or
leave the list". 
	VADCFLL administrative announcements are sent via
VADCFLL-ADMIN-L. Visit
https://listserv.jmu.edu/archives/vadcfll-admin-l.html to subscribe. 

________________________________

To UNSUBSCRIBE or CHANGE your settings, please visit
https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or
leave the list". 
VADCFLL administrative announcements are sent via VADCFLL-ADMIN-L. Visit
https://listserv.jmu.edu/archives/vadcfll-admin-l.html to subscribe. 


-- To UNSUBSCRIBE or CHANGE your settings, please visit https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or leave the list".

-- VADCFLL administrative announcements are sent via VADCFLL-ADMIN-L. Visit https://listserv.jmu.edu/archives/vadcfll-admin-l.html to subscribe.