a new bs2px with a bad communication

RL600

Hello all,

Recently I have bought a new bs2px. I know that there must be make some changes, but which one and how.
I have changed the baudrate, but the communication with the sayit module isn't seamless.
I hope you can help me.

RL600

Unsoundcode

Hi, if you are using the Say It Demo.bs2 you will need to modify the baud commands and the PULSOUT commands.

This is the baud modification from BS2 to BS2px

BS2

COM_SPEED           CON         84     ' baud 9600 '------BS2

BS2px

COM_SPEED           CON         396     ' baud 9600 '------BS2px

Each PULSOUT should be modified by multiplying the PULSOUT value by 2.5

Example BS2

PULSOUT LServo, 500

Example BS2px

PULSOUT LServo, 1250  '--------500 * 2.5 = 1250

Jeff T.

RL600

Many thanks,

The PULSOUT command must be changed, but which must be maked with a continuous rotation.
I'm using the say-it module on a boe-bot.

RL600

Unsoundcode

For a continuous rotation servo the pulse duration should fall between 1.3 mS and 1.7ms and the servo should be calibrated to be stationary at 1.5mS. Anything higher than 1.5mS and the servo should turn ccw anything lower than 1.5mS the servo should turn cw. The pulses should ideally be delivered every 20mS

Each Basic Stamp has a "unit" of duration and for the BS2px this unit of duration is 0.8 microseconds this can also written 0.0000008 seconds. To determine how many units are required for the stationary value of 1.5mS all you have to do is divide 1.5mS by the unit of duration 0.8 microseconds. Here is the example :- 0.0015 / 0.0000008 = 1875, written in code as follows

PULSOUT servoPin, 1875

The same goes for each extreme : -

(1.7mS) 0.0017 / 0.0000008 = 2125 (fully ccw)

(1.3mS) 0.0013 / 0.0000008 = 1625 (fully cw)

Jeff T.

RL600

Hi Unsoundcode,

Thanks for your fast reply. Before these information I send pulses far beneath. So now I know the reason why he always turn to the left.
Again many thanks.

RL600

Scott4

Unfortunately I can't seem to upload an Excel file so here is an image of the spreadsheet I made based on the calculator in the Syntax manual.

If you put a pull-down list in cell D5 you can select the processor from the table at the right. (data...data validation...list...$H6:$H11). -Scott