Search found 1543 matches

by Basicmicro Support
Wed Feb 24, 2021 11:47 am
Forum: General Discussion
Topic: Component confirmation
Replies: 3
Views: 1102

Re: Component confirmation

Yes you can, but the lower you go the larger the resistor needs to be(eg 1/4watt 1 watt 5 watts etc... to deal with the power dissipation. Also I don't recommend anything smaller than a 6ohm resistor. This will limit Di/Dt to something reasonable.
by Basicmicro Support
Wed Feb 24, 2021 11:46 am
Forum: General Discussion
Topic: [security issue] No encoder -> maximal speed
Replies: 3
Views: 898

Re: [security issue] No encoder -> maximal speed

This is not a security issue. This is a PID controller. It can not tell if there is an encoder connected or not. It assumes no pulses means the motor needs more power. However you can use the speed or position error limits to prevent runaway. You need to set them appropriately and if you use them yo...
by Basicmicro Support
Wed Feb 24, 2021 11:44 am
Forum: General Discussion
Topic: Firmware 4.1.34: Power Cycle required when enabling Limit/Homing Switches
Replies: 7
Views: 6135

Re: Firmware 4.1.34: Power Cycle required when enabling Limit/Homing Switches

Did you send it to support@basicmicro.com. I've currently answered all emails received more than a couple days ago. If you still have not received a response please resend it.
by Basicmicro Support
Wed Feb 24, 2021 11:42 am
Forum: Velocity and Position Control
Topic: Using 3 roboclaw, packet serial, USB
Replies: 30
Views: 12842

Re: Using 3 roboclaw, packet serial, USB

Max current on a 2x30A defaults to 60amps on each channel. That's the peak current limit. P.S. if you are have a false current reading error you may need to adjust the current blanking percentage for that channel. They default to 5.4% which may be to small for some motors. Values can be as high as 2...
by Basicmicro Support
Wed Feb 24, 2021 11:39 am
Forum: Velocity and Position Control
Topic: Signed position not speed
Replies: 1
Views: 402

Re: Signed position not speed

I think your wording is incorrect. It may be a mistake or misunderstanding. Misleading has different connotations.

Positions arguments are 32bit values. You can think of them as signed or unsigned values, your choice. But they must be 32bit value.
by Basicmicro Support
Thu Feb 18, 2021 11:17 am
Forum: General Discussion
Topic: Pre-Charge Circuit Question
Replies: 1
Views: 829

Re: Pre-Charge Circuit Question

The single resistor is the simplest option but causes a constant, though low, power drain. You could also add a secondary toggle switch to the resistor so you would first put it in circuit, wait a couple seconds and then switch on the main power. Another option would be a complex automated solution ...
by Basicmicro Support
Thu Feb 18, 2021 11:14 am
Forum: General Discussion
Topic: Both roboclaws sudenly stop
Replies: 5
Views: 3631

Re: Both roboclaws sudenly stop

We don't have a specific linux implementation in C/C++ mainly because there is no standard serial port class(python has pyserial atleast). However I usually recommend to people to use the arduino C++ implementation. The arduino library was written so the only arduino specific dependency was the seri...
by Basicmicro Support
Thu Feb 18, 2021 11:02 am
Forum: General Discussion
Topic: [python2] Roboclaw instance has no attribute '_port'
Replies: 3
Views: 2836

Re: [python2] Roboclaw instance has no attribute '_port'

Thank you for posting this. We have had multiple Jetson users in the past that had issues and never had a resolution. This will help immensely.
by Basicmicro Support
Thu Feb 18, 2021 11:01 am
Forum: General Discussion
Topic: Can I read output voltage to motor?
Replies: 1
Views: 832

Re: Can I read output voltage to motor?

If you are using velocity control you have no control over the PWM. The Velocity PID does. The PWM setting is only valid(IIRC) if you are controlling the duty directly.
by Basicmicro Support
Thu Feb 18, 2021 10:59 am
Forum: General Discussion
Topic: Component confirmation
Replies: 3
Views: 1102

Re: Component confirmation

309ohms is a reasonable calculation. You can go lower of course. Even limiting the pre-charge time to 1/10th of second will limit the surge current enough to prevent a significant ground bounce. That ground bounce is what causes negative spikes on power up which can kill electronics. We are very con...