Search found 36 matches

by robof
Wed Aug 23, 2017 12:35 pm
Forum: General Discussion
Topic: Roboclaw Python Class python3
Replies: 3
Views: 6088

Re: Roboclaw Python Class python3

There was a change in pyserial with python 3 that assumed a different data type sent to write() command. I've not tested this extensively, but so far this change appears to be all I needed to get the Roboclaw class to work in python 3.x Change self._port.write(chr(XXX)) To self._port.write(bytes([XX...
by robof
Tue Aug 22, 2017 8:04 pm
Forum: General Discussion
Topic: Detect Roboclaw USB on Ubuntu VirtualBox
Replies: 2
Views: 5270

Re: Detect Roboclaw USB on Ubuntu VirtualBox

I know this post is a couple weeks old and you may have already solved it, but as no confirmed resolution is posted I wanted to add to it in the event someone searches for help later. I am doing the opposite, using VirtualBox inside Ubuntu to run a Windows VM, specifically to run ION Studio for flas...
by robof
Tue Aug 22, 2017 5:31 pm
Forum: General Discussion
Topic: Roboclaw Python Class python3
Replies: 3
Views: 6088

Roboclaw Python Class python3

Is there any chance someone has a python 3 version of the Roboclaw class? I've got a larger python 3.x project I'm trying to incorporate Roboclaw into, but it appears to be written for python 2.x so I'm getting some errors with some of the lower level / more internal serial/checksum portions of the ...
by robof
Wed Aug 16, 2017 9:46 pm
Forum: Velocity and Position Control
Topic: Encoded motor recommendations
Replies: 11
Views: 14284

Re: Encoded motor recommendations

acidtech wrote:Currently removing the snubber cap(s) is the best option if you feel comfortable doing it but if not please check back next week.
Just checking back this week, per your comment from last week.

Are you by chance doing some testing specifically with the servo city encoders?
by robof
Mon Aug 07, 2017 1:48 pm
Forum: General Discussion
Topic: PWM Speed difference - Locked Antiphase vs Sign Magnitude
Replies: 1
Views: 3820

PWM Speed difference - Locked Antiphase vs Sign Magnitude

I'm trying to test Sign Magnitude vs Locked Antiphase PWM modes to work on my hall effect encoder count issues per servocity's suggestion; however I noticed some major differences in speeds between the two PWM Modes Is this a similar/related issue? Or something different? In Sign Magnitude mode it a...
by robof
Thu Jul 27, 2017 10:20 am
Forum: Velocity and Position Control
Topic: Encoded motor recommendations
Replies: 11
Views: 14284

Re: Encoded motor recommendations

I went ahead and purchased both to try. I will report back with my results for anyone else that might be interested. - US digital E4T -- https://www.usdigital.com/products/encoders/incremental/rotary/kit/E4T - CUI AMT10 -- http://www.cui.com/product/components/encoders/incremental/modular/amt10-v-ki...
by robof
Wed Jul 26, 2017 7:18 pm
Forum: Velocity and Position Control
Topic: Encoded motor recommendations
Replies: 11
Views: 14284

Re: Encoded motor recommendations

Thanks, I will get both of these and try. Are both/either of these plug and play, or would they need a pull-up resistor? I may try the modification to the snubber cap mentioned on one of the motors, it's about a $50 test, but assuming it worked perfectly I guess it would save me the time of using af...
by robof
Wed Jul 26, 2017 7:12 pm
Forum: General Discussion
Topic: Encoder count off with Actobotics encoder
Replies: 10
Views: 12158

Re: Encoder count off with Actobotics encoder [Solved]

Yeah I understand the problem isn't specific to this company, I just want to make sure I don't 'damage' the encoders on the motors in the event I need to send these back for a refund/replacement. I'm happy with the price/performance of the motors, so I may return these and get the non-encoder versio...
by robof
Wed Jul 26, 2017 4:26 pm
Forum: Velocity and Position Control
Topic: Encoded motor recommendations
Replies: 11
Views: 14284

Encoded motor recommendations

I'm looking for recommendations on 12-24v dc brushed motors and encoders, preferably with the encoders pre-installed, that have been tested with roboclaw and can be accurately positioned via the encoder. A pre-installed gearbox is a plus as that's one less thing I have to mess with. I would like to ...
by robof
Wed Jul 26, 2017 3:59 pm
Forum: General Discussion
Topic: Encoder count off with Actobotics encoder
Replies: 10
Views: 12158

Re: Encoder count off with Actobotics encoder

Thanks a lot for your very detailed and extremely helpful responses. The features roboclaw offers initially drew me to them and the customer service I have seen will keep me a loyal fan; so keep up the good work. :D I still need to work this encoder issue out with ServoCity/Actobotics since I don't ...