
pacomms
Hi there, so i have managed to get a BV4113 H Bridge, i have installed latest firware and connected as per your diagram on the tutorials page, i have a pretty significant issue however, i have opened up a new project and i only have the BV4113 Movement Panel active, i connect to the bot fine but the issue is that if i now press one of the movement buttons nothing happens at all, however if i disconnect the BV4113 from the EZb and then reconnect it it works perfect, even if i disconnect and reconnect to the ezb via bluetooth its fine until i turn of the ez b, when i power back on same issue no movement, until i disconnect the BV4113 and reconnect it, then its fine again, its like this every time, it is as if the BV4113 requires a reset or resync b4 it will work, this is ok when my bot is opened up but when everythings inside i cant get to the board to unplug it and plug it back in again, any ideas ?
Thanks
Kurt
(NB i have double triple checked my connections, i have even tried toggling D0 on and off but even that doesnt work, i have to manually disconnect it then reconnect and its ok)
Thanks
Kurt
To resolve it..
1) power ez-b
2) unplug motor controller from ez-b (the digital i/o plug)
3) plug motor controller back into ez-b
4) it works
Kurt
I emailed Sabertooth, they were not willing to donate a board for development. I don't support products that don't support EZ-Robot.
As for the Sabertooth, if it doesn't like the pulse width of a modified servo panel to be in R/C mode, then try something for me.
1) Connect your sabertooth module in R/C mode.
2) Add 2 standard vertical servo controls (one or each motor)
3) Set the vertical servo controls to the ports the sabertooth is connected to
4) Slide the dials and tell me what the maximum and min values are of when the motors move.
Maybe i'll consider adding support for the sabertooth pulse width when i have time.
Regards
Kurt
It'll be in the next release. your sabertooth will work flawlessly with the modified servo movement panel
Thanks
Kurt
As for work-around. After the ez-b has been powered up, simply disconnect and reconnect the servo plug to the ez-b. I have 100% success with that while testing to find the issue.
Thanks
Click on "Choose Items Individually" just under the "BUY" tab. The H Bridge is near the bottom of the list described as "1.5 Amp Motor Controller".
i have 3 of the sabertooth 2x25's.
i'm using 2 of them right now.
i'm tempted to send you one of them to test, then you can send it back when you are done. they cost me $130 usd each
but i trust you.
i'm going to try to unplug trick and see if that works.
do you think maybe the pwm signal is correct but maybe its picky on the voltage?