BS2 to BS2p conversion (esp. for PULSOUT)

java_programmable

Hello all, is there an exact conversion rate for PULSOUT commands and suchlike? I know it's approx 2.5 but I have some very sensitive PULSOUT values because the servo speeds are not the same. Also because I need exact speeds, and it would be a pain in the butt to do 100 PULSOUT calculations all over again. I don't even know max and min speeds for the BS2p! Help, please?

Chris Savage

Hello,

·· Why would you have to do 100 calculations?· Once you calculate for the center position, you can use an offset value for the forward and backward values.· Or, calculate one extreme and the other, and use that range.· I may be missing what you're trying to say, but it sounds like you're over complicating it.

·· How many values are you currently using for the BS2 code?

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Chris Savage
Parallax Tech Support
csavage@parallax.com

Jon Williams

If you look in the help file (hint, hint) there is an example that shows you how to save yourself the trouble of calculating everything.

#SELECT $STAMP
  #CASE BS2, BS2E, BS2PE
    Scale       CON     500             ' to ms for 2 us per unit
  #CASE BS2SX, BS2P
    Scale       CON     1250            ' to ms for 0.8 us per unit
#ENDSELECT

Flash           CON     25 * Scale      ' 25 milliseconds

If you want to do it all manually divide your pulse width (in microseconds) by 0.8.

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Jon Williams
Applications Engineer, Parallax
Dallas, TX· USA