<![CDATA[BW-DR03 with ROS wrong direction control]]>Hi I’m Jaruwat form Thailand

I use BW-DR03 on Ubuntu ROS Melodic, pkg xqserial_server branches Lungu, connect with hub motor with True left wheel Ma1 H0 and right wheel Mb1 H1

I used Mtools for test BW-DR03 when I test on Open loop speed control mode positive PWM motor direction clockwise and PWM negative counterclockwise boths direction smooth

but when I connect BW-DR03 with ROS when I pub angular velocity robot direction is wrong such as positive angular velocity robot direction clockwise and negative angular velocity robot direction counterclockwise (no problem with linear velocity) how to solve this problem?

Thank you

989887.jpg

]]>http://community.bwbot.org/topic/2946/bw-dr03-with-ros-wrong-direction-controlRSS for NodeMon, 20 Apr 2026 05:56:55 GMTFri, 25 Sep 2020 07:52:00 GMT60<![CDATA[Reply to BW-DR03 with ROS wrong direction control on Fri, 23 Sep 2022 04:42:36 GMT]]>@jarubank dis you able to run your motors as expected. I am having issues with my 6.5 BLDC hoover motors non-brand.

]]>http://community.bwbot.org/post/16891http://community.bwbot.org/post/16891Fri, 23 Sep 2022 04:42:36 GMT<![CDATA[Reply to BW-DR03 with ROS wrong direction control on Wed, 06 Jan 2021 05:17:02 GMT]]>@jarubank right

]]>http://community.bwbot.org/post/4120http://community.bwbot.org/post/4120Wed, 06 Jan 2021 05:17:02 GMT<![CDATA[Reply to BW-DR03 with ROS wrong direction control on Wed, 06 Jan 2021 03:25:33 GMT]]>@xiaoqiang when /cmd_vel = 0 BW-DR03 will short circuit, right?

]]>http://community.bwbot.org/post/4118http://community.bwbot.org/post/4118Wed, 06 Jan 2021 03:25:33 GMT<![CDATA[Reply to BW-DR03 with ROS wrong direction control on Wed, 06 Jan 2021 02:51:07 GMT]]>@jarubank no, the motor is braked by short circuit in BW-DR03

]]>http://community.bwbot.org/post/4117http://community.bwbot.org/post/4117Wed, 06 Jan 2021 02:51:07 GMT<![CDATA[Reply to BW-DR03 with ROS wrong direction control on Wed, 06 Jan 2021 02:02:24 GMT]]>@xiaoqiang BW-DR03 can break by electric break?

]]>http://community.bwbot.org/post/4115http://community.bwbot.org/post/4115Wed, 06 Jan 2021 02:02:24 GMT<![CDATA[Reply to BW-DR03 with ROS wrong direction control on Fri, 27 Nov 2020 01:51:28 GMT]]>@jarubank the nan is a wrong data. I have updated the code, added a nan value filter . Use git pull, get the new code, then catkin_make .

https://github.com/BluewhaleRobot/xqserial_server/tree/lungu
]]>http://community.bwbot.org/post/3946http://community.bwbot.org/post/3946Fri, 27 Nov 2020 01:51:28 GMT<![CDATA[Reply to BW-DR03 with ROS wrong direction control on Wed, 30 Sep 2020 04:01:12 GMT]]>“Error: TF_NAN_INPUT: Ignoring transform for child_frame_id “base_footprint” from authority “/motor_driver””

how to solve?

Screenshot from 2020-09-30 11-00-03.png

]]>http://community.bwbot.org/post/3945http://community.bwbot.org/post/3945Wed, 30 Sep 2020 04:01:12 GMT<![CDATA[Reply to BW-DR03 with ROS wrong direction control on Tue, 29 Sep 2020 02:24:48 GMT]]>@xiaoqiang maxspeed = 300rpm = 5 rps

]]>http://community.bwbot.org/post/3944http://community.bwbot.org/post/3944Tue, 29 Sep 2020 02:24:48 GMT<![CDATA[Reply to BW-DR03 with ROS wrong direction control on Tue, 29 Sep 2020 02:24:07 GMT]]>@jarubank maxspeed = 2 * 1.224/0.5 = 4.896, so maybe 5 is the true value of maxspeed.

]]>http://community.bwbot.org/post/3943http://community.bwbot.org/post/3943Tue, 29 Sep 2020 02:24:07 GMT<![CDATA[Reply to BW-DR03 with ROS wrong direction control on Mon, 28 Sep 2020 15:18:59 GMT]]>above picture is true value of my car. I use Zltech hub motor 13 inch

]]>http://community.bwbot.org/post/3942http://community.bwbot.org/post/3942Mon, 28 Sep 2020 15:18:59 GMT<![CDATA[Reply to BW-DR03 with ROS wrong direction control on Mon, 28 Sep 2020 11:14:24 GMT]]>@jarubank edit xqserial.launch file, change those two parameters “wheel_radius” and “max_speed” to the true value of your car.

]]>http://community.bwbot.org/post/3941http://community.bwbot.org/post/3941Mon, 28 Sep 2020 11:14:24 GMT<![CDATA[Reply to BW-DR03 with ROS wrong direction control on Mon, 28 Sep 2020 07:34:10 GMT]]>Thank you!!

I have new problem when I publish cmd_vel 0.5m/s but /xqserial_server/Odom has 1.2m/s how to solve this?
Screenshot from 2020-09-28 14-25-56.png

]]>http://community.bwbot.org/post/3940http://community.bwbot.org/post/3940Mon, 28 Sep 2020 07:34:10 GMT<![CDATA[Reply to BW-DR03 with ROS wrong direction control on Fri, 25 Sep 2020 11:20:17 GMT]]>@jarubank 安装方向.JPG Set this value to true. It means installation direction of bw_dr03. upwoard is true, downward is false.

]]>http://community.bwbot.org/post/3936http://community.bwbot.org/post/3936Fri, 25 Sep 2020 11:20:17 GMT