First, verify that you have wheel slip. Film it in slo motion. Does it happen every time? Does setting a slower speed help? Going from zero to 100 in a blink is pretty much always going to cause some slip. Especially if you have big wheels. Also, is your robot balanced? Maybe you have a heavy attachment on one side? That can throw things off by taking a lot of weight off of one wheel which can cause it to slip more easily. Finally, for a really advanced solution you can try and write an acceleration myblock. Otherwise, the only solutions are to ensure your robot is balanced, and use slower speeds.


On Mon, Oct 7, 2019 at 8:26 PM Alicia A. Strahan <[log in to unmask]> wrote:
Accelerating from start.  Wheels spin but it doesn’t grip on the mat.  Doesn’t happen every time but throws off the robot just enough to mess up the mission.  

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From: Skip Morrow <[log in to unmask]>
Sent: Monday, October 7, 2019 8:04:22 PM
To: Alicia A. Strahan <[log in to unmask]>
Cc: [log in to unmask] <[log in to unmask]>
Subject: Re: [VADCFLL-L] Robot skidding on board
 
What do you guys mean by "skidding"? When I think of skidding, I think of putting on the brakes, locking up my tires, and screeching to a stop. That obviously doesn't apply here.

Are you talking about a general loss of traction, leading to robot inaccuracy? If so, are we talking mostly during turns? Or accelerating from a dead stop?



On Mon, Oct 7, 2019 at 3:22 PM Alicia A. Strahan <[log in to unmask]> wrote:
We have noticed a problem as well.  It does not happen every time and does not happen when we run the code on a different surface like the floor. 

Alicia Strahan

STEM Lab Teacher
Rosa Parks Elementary School

From: First Lego League in Virginia and DC <[log in to unmask]> on behalf of Alina Marston <[log in to unmask]>
Sent: Monday, October 7, 2019 3:01 PM
To: [log in to unmask] <[log in to unmask]>
Subject: [VADCFLL-L] Robot skidding on board
 
Hi everyone,

  My team is having trouble with our robot wheels skidding on our board. My team has tested their robot on two other boards and the robot's wheels do not skid when turning on the other two boards, but they do skid when they turn on ours. We had another team test their robot and programs on our board last week and their wheels skidded also when running on our board. In all, we've tested three other robots on the other two boards and none of them skid like on ours at home. Has anyone else had this problem?

Thanks!
Alina Marston
The Magically Energized Lightning Waffle Bunnies

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