599 Vex Round_up Mentor Bobcat: Autonomous Low Hang Test.AVI

Off season Vex Roundup test robot performs a simple 25 step programming challenge in my living room. It culminates in a low hang (all of robot above 6 in).

Robot uses the new cortex with RobotC. The new Vex 2 wire 393 motors are used on the lifts. Two legacy motors are used for the drive in 1:1 gearing so it is a little slow (about 10 in/s max speed). It has two sonic rangers, a servo operated goal approach spacing arm,a three position servo grip, three line sensors, two quadrature encoders ,4 limit switches and two button switches. So all the cortex discretes are used plus most of the analog inputs. There are two legacy motors in reserve. Robot is designed to do a high hang (wheels above 18 in) ..but this needs a little more work because of unexpected slide friction.

See http://vamfun.wordpress.com for more details

Category:

Education

Tags:

• vex cortex round up
• roundup
• round_up
• programming challenge
• autonomous
• low hang
• high hang
• robot
• mentor bobcat
• 393 motors

[vamfun]

Full time Vex/FRC with Robodox 599 in Granada Hills Ca.

Part time with Grant High School Vex team in Van Nuys, Ca.

Sponsor of Yehabots in Madrid, Spain.

[Zepp710]

oh also for u're hanging thing did u use stand offs or what did u use to actually get it to hang?

[vamfun]

@Zepp710 Beam with a bearing block to help grab.

[vamfun]

Well, the robot uses 4 linear slides. Two are on the lower lift portion and two are on the upper. The racks of the upper and lower slides are tied together. Some small extensions are needed on the racks to get the whole 18 in extension. (9 in per slide ).  There is lots of torque... 2 393 motors per stage working on a 36 tooth drive gear. This gives speed and enough torque for a fast high hang. This robot never competed... just a summer project for me. Check out my blog for new stuff.

[Zepp710]

sh** that robot is huge. how do u hang with tha much weight? also how do u program the line sensors in robot c? i've been wanting to know that. also have u done the battery mod for the controller?

[vamfun]

@Zepp710 The code is posted on the vex forum code section as "RobotC Mentor Bobcat Scripting during driver operation" , or you can find links on my blog. Google: vamfun,RobotC,programming challenge. The code has the line sensor tracker.

[Zepp710]

@vamfun thanks dude i got the programming working. my autonomous is much better now? Do u mentor a team that is competing?

[Zepp710]

oh btw. we've been trying to get a good system for linnear motion that can score as well. currently we have it on a four bar link and we are thinking of doing a dual stage four bar linkage with linear slides. it looks like you did a triple stage linear slide mechanism is that correct? if so does that work well? also are you in the college competitions or the regular ones? and what area are u from and are u going to the world championships? wow thats a long message.

[Abtein1]

couple thousand on a robot and you should get this

[mike5454ful]

Is team 599 going to the Carson vex compeition. 10/16/10. At CAMS.