Search found 8 matches

by marsrover
Tue Aug 16, 2016 1:15 pm
Forum: Velocity and Position Control
Topic: Mixing position and speed/distance commands
Replies: 4
Views: 7465

Re: Mixing position and speed/distance commands

I would like to be able to: 1: Stop the "hold position" effect of the position command. 2: Abort a position command that is currently executing. It seems that I can do 1 by executing command 34 "duty cycle" with argument 0 with no ill effects if the motors are already stopped. I ...
by marsrover
Sun Aug 14, 2016 12:29 pm
Forum: Velocity and Position Control
Topic: Mixing position and speed/distance commands
Replies: 4
Views: 7465

Re: Mixing position and speed/distance commands

After some more experimenting: When command 67 fails it always seems to drive M1 or M2 at full speed in the wrong direction for one or a few seconds. Then the Roboclaw seems to recover. The misbehaving motor suddenly reverses direction and drives at normal speed until it reaches the correct position...
by marsrover
Sat Aug 13, 2016 1:35 pm
Forum: Velocity and Position Control
Topic: Mixing position and speed/distance commands
Replies: 4
Views: 7465

Mixing position and speed/distance commands

I'm having some problems with the drive to position command (67). It works perfectly by itself, but when I mix it with speed and distance commands (i.e. commands 43 or 37) the motors can suddenly go to full speed. It happens rarely, maybe 1 out of 10 times. It's command 67 that causes this, but only...
by marsrover
Thu Jul 21, 2016 11:47 am
Forum: General Discussion
Topic: Minimum Logic Battery Voltage
Replies: 22
Views: 26020

Re: Minimum Logic Battery Voltage

In that case it really sounds like I should remove the regulator. I don't want it to fail later. I did this and now I have a green light when I feed regulated 5V to the +5V rail, so I'm happy. I have to say to say it's unusual with products that have support forums as good and as active as this one....
by marsrover
Wed Jul 20, 2016 8:56 am
Forum: General Discussion
Topic: Minimum Logic Battery Voltage
Replies: 22
Views: 26020

Re: Minimum Logic Battery Voltage

Yes, I'm trying to bypass the onboard 5v regulator, but that doesn't work due to bleed through to the LB IN + pin. You then claimed that the 5v regulator is broken, but I say it isn't, because if I power the board through LB IN instead of through the +5V rail the regulator works just fine. It wouldn...
by marsrover
Mon Jul 18, 2016 10:44 am
Forum: General Discussion
Topic: Minimum Logic Battery Voltage
Replies: 22
Views: 26020

Re: Minimum Logic Battery Voltage

It doesn't look like a short. I can find no problems with the board. The 5 V rail is very stable at 5.00 V regardless of battery voltage (supplied the normal way, i.e. LB IN). The current consumption is 30 mA at 10 V (a little higher at lower voltage). This is a new unit, not used much at all. I pro...
by marsrover
Sat Jul 16, 2016 5:47 am
Forum: General Discussion
Topic: Minimum Logic Battery Voltage
Replies: 22
Views: 26020

Re: Minimum Logic Battery Voltage

When you power the board from the middle pin of S1(eg the 5v rail) you must remove the LB/MB jumper, as you did. Then there is no direct connection from the 5v rail to the BEC circuit. However there may be bleed through or inductive coupling which could cause the LB+ pin to float up to 5v(usualyl i...
by marsrover
Sun Jul 03, 2016 11:08 am
Forum: General Discussion
Topic: Minimum Logic Battery Voltage
Replies: 22
Views: 26020

Re: Minimum Logic Battery Voltage

It seems that this trick doesn't work. I have a Roboclaw 2x15A V5. If I put regulated 5 V on the middle S1 pin (LB/MB jumper removed) the LB IN + pin will not float. Instead it will be close to 5 V and there is no way I can pull it low. Is there maybe a trace somewhere I can cut to disable the BEC v...