Search found 1537 matches

by Basicmicro Support
Thu Jun 10, 2021 6:28 pm
Forum: General Discussion
Topic: Odd Speed Readings Of Motor Speeds with 2x7A
Replies: 1
Views: 87

Re: Odd Speed Readings Of Motor Speeds with 2x7A

Speed will go to zero when the motor stops. Note the Speed reading is a 1 second average. The ISpeed reading is the 1/300th of a second instant speed. If you have noise on your encoder inputs you could get an instantaneous speed of up to 9.8 million. Enough noise could cause the symptom you describe...
by Basicmicro Support
Thu Jun 10, 2021 6:25 pm
Forum: General Discussion
Topic: RoboClaw 2x45A Tx pin sourcing current
Replies: 1
Views: 77

Re: RoboClaw 2x45A Tx pin sourcing current

The TX pin is limited to 10ma.
by Basicmicro Support
Wed Jun 02, 2021 11:49 am
Forum: General Discussion
Topic: Limit reading and actions at limit
Replies: 1
Views: 87

Re: Limit reading and actions at limit

Use the Read Status command. The WARN_S4 and WARN_S5 bits indicate the current state of the limit switch for motor 1 and motor 2.

viewtopic.php?f=2&t=924

Do you have the latest firmware installed? What mode do you have the limit switches set to in General Settings?
by Basicmicro Support
Wed Jun 02, 2021 11:47 am
Forum: Velocity and Position Control
Topic: "EN1" only ticks at high speeds. Tick count wrong
Replies: 1
Views: 65

Re: "EN1" only ticks at high speeds. Tick count wrong

Please take pictures of the encoder signal lines on an oscilloscope and email support@basicmicro.com about this. If the encoder signals are clean and noise free then it could be a problem with the encoders(excedingly rare). Noise is the usual cause of problem. This is especially common on motors wit...
by Basicmicro Support
Wed Jun 02, 2021 11:44 am
Forum: General Discussion
Topic: Custom firmware for Roboclaw
Replies: 1
Views: 60

Re: Custom firmware for Roboclaw

You can not.
by Basicmicro Support
Wed Jun 02, 2021 11:44 am
Forum: General Discussion
Topic: Wire Lengths?
Replies: 1
Views: 25

Re: Wire Lengths?

The datasheet it being very conservative. Power wires should be kept as short as possible. Use larger gauge wire than you think you need. The longer the wire the larger the wire gauge should be. 3 feet of wire and the power wire being at least the same gauge as the motor wire is ok. Using large leng...
by Basicmicro Support
Wed Jun 02, 2021 11:39 am
Forum: General Discussion
Topic: Firmware Update, no mode button?
Replies: 1
Views: 23

Re: Firmware Update, no mode button?

Just click Update firmware. There is no mode button on some models of Roboclaw. The mode button to force bootloader mode is not required. Motion Studio will send a command to tell the unit to go into bootloader mode.
by Basicmicro Support
Wed Jun 02, 2021 11:37 am
Forum: Velocity and Position Control
Topic: Motor Controller doesn't output 100% duty
Replies: 1
Views: 59

Re: Motor Controller doesn't output 100% duty

Most mosfet drivers use a boost capacitor to generate the high side gate voltage. This requires recharging the cap which requires turning off the high side for a short period of time. This limits the on-time to around 98%.
by Basicmicro Support
Wed Jun 02, 2021 11:34 am
Forum: General Discussion
Topic: burnt Roboclaw 2x7A repairs
Replies: 2
Views: 118

Re: burnt Roboclaw 2x7A repairs

The controller is not designed to survive reverse power. It will have instantly damaged the mosfet drivers.

If you still want to try, they are as you determined, 2512 10mOhm. They need to be a minimum of 2watt.

The a4940K chips are almost certainly dead as well.
by Basicmicro Support
Wed May 19, 2021 2:11 pm
Forum: Velocity and Position Control
Topic: Using 3 roboclaw, packet serial, USB
Replies: 30
Views: 12177

Re: Using 3 roboclaw, packet serial, USB

1. No, there is no speed limit adjustment in the Roboclaw.
2. Logic battery is optional. When not used, the main battery will power logic. The main purpose of the logic battery is to eliminate brownouts due to the main battery being pulled too low by the motors.