My Scribbler stall sensor has issues...

Robofreak

I have had this problem ever since i got the thing... When i program it to do something when the stall sensor is triggered, it keeps false triggering! First, when it triggers, it keeps triggering after that, then after a while, it continues on it's way, then keeps false triggering! I don't get it... Well, if you think you have the solution, i have attached the program.

Post Edited (Robofreak) : 11/4/2007 12:17:08 PM GMT

JD

Which side is your Scribbler giving false triggers on?

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Joshua Donelson

www.parallax.com

Chris Savage

This thread is being moved from the BASIC Stamp Forum to the Robotics Forum.

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Chris Savage
Parallax Tech Support

Robofreak

I have no idea. I looked at the schematic online, and it looks like it doesn't matter which one is triggered. They are hooked up to the same circuit. There is no way of telling which one is triggering, I don't think...

Post Edited (Robofreak) : 11/2/2007 3:07:34 PM GMT

Skippy

I am having the same problem with my Scribbler. After trying to write my own code, I loaded one of the sample programs I found on the Parallax web site called CheckStall.bs2. I ran this with the Scribbler in my hands allowing the wheels to spin freely. The value 0 is displayed briefly when it first starts. It then changes to 1 and never goes back to zero. I can then stop the wheels with·my fingers but the value remains 1.·Does anyone have any idea about what I can do to fix this problem?

Here is the code I am running:

' Scribbler PBASIC Programming Guide - CheckStall.bs2
' Display stall sensor I/O pin status in Debug Terminal
' {$STAMP BS2}
' {$PBASIC 2.5}

DEBUG "Program running!"

' I/O Pin Definitions
Stall····· PIN 7
MotorRight PIN 12
MotorLeft· PIN 13

' Variable Declaration
stuck VAR Bit

' Motor Initialization
LOW MotorRight
LOW MotorLeft
PAUSE 100

' Main Program

PULSOUT MotorRight, 3000 ' motors full speed forward
PULSOUT MotorLeft, 3000

DO······················ ' Put status of Stall I/O pin
· stuck = Stall········· '· into the variable "stuck"
· DEBUG HOME, BIN stuck· ' Display binary value of stuck
· PAUSE 50·············· ' time to read display
LOOP

JD

Robofreak and Skippy,

If either of you are still having the stall sensor issue with the Scribbler; please contact Technical Support at 888-998-8267 to set up an RMA for testing.·Thank You

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Joshua Donelson

www.parallax.com

Post Edited (Joshua Donelson (Parallax)) : 6/26/2008 4:52:26 PM GMT