hB25 and bs2sx

robonut

Hello All,

I'm using the code provided in the manual of the HB25 however the code is written for a bs2, I'm trying to use it with a bs2sx does anybody know what i need to change in the code. I tried changing the constant of 750 to 1875 since the bs2sx is 2.5 times faster than the bs2. Is thos correct or is there something else i need to change.

allanlane5

Get a copy of the 'standard template'. It has #defines for all the common constants.

That, or look in the manual. Personally, I call these basic units a "tick size".

For instance, in PULSOUT, the BS2 'plain' "tick size" is 2 uSec. You're specifying the output pulse width in 2 uSec 'units', or 'ticks'.

So, 'tick size' varies for the following commands:
SERIN/SEROUT, PULSIN/PULSOUT, RCTIME. I'm not sure if COUNT depends on the 'tick size' or not.

bjhamltn

For the bs2sx, 1875 shoud stop the motor or at least cause the motor to runs slow.
Idealy 1875 should stop the motor but adjustments may be needed.

1875<x<2500 should cause the motor to run in the forward direction
1250<x<1875 should cause the motor to run in the reverse direction

When using the bs2sx, Pulsout generates a pulse with a duration of 0.8 us = unit of duration.
The spec for the HB25 state that
1.0 ms = full speed reverse
1.5 ms = stop
2.0 ms = full speed forward

To find the required number of units of durations use the following conversion

(desired time in ms) * 1000/(unit of duration) = required unit duration

Example for the case of bs2sx with pulsout unit of duration = 0.8

1.7*1000/0.8 = 1.7*1250 = 2125

2125 is the value that youwould use in the pulsout command

Warrlok

can he declare somewhere pulseleft =750 *2.5
or 750 * 25 / 10


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Post Edited (Warrlok) : 3/3/2007 7:29:45 PM GMT