Search found 943 matches

by rew
30 Mar 2016, 12:32
Forum: General
Topic: Compiling VESC firmware on Windows
Replies: 31
Views: 47758

Re: Compiling VESC firmware on Windows

As you see in the makefile, around line 267, the ".bin" should be generated from teh ".elf". That section explains to make how to do that. In the chibios sources, the rest, including "how to build the .elf" is being "explained to make". On my system that works...
by rew
30 Mar 2016, 12:25
Forum: General
Topic: Current control gain
Replies: 4
Views: 2751

Re: Current control gain

You have them on the same VESC? In theory you're quite lucky it works at all. It is unlikely that the motors are in the same "phase", So if one motor needs "phase 1: A+B-" the other one might be in "Phase 3: C+A-". The timing belt enforces then that both motors stay the...
by rew
30 Mar 2016, 12:18
Forum: General
Topic: case for VESC
Replies: 10
Views: 5729

Re: case for VESC

We did a similar test here. At a certain point we noticed the temperature about 75C. Then we set "max temp" configuration to 60-80, and we noticed that the board would automatically start slowing down when the temperature hit something like 70 degrees. That works! So then we were confident...
by rew
30 Mar 2016, 12:12
Forum: FOC
Topic: FOC and ultra small angular move.
Replies: 3
Views: 2487

Re: FOC and ultra small angular move.

Angelo, I would expect the ball screw pitch to be something like 2mm per revolution. So that a 2 micrometer movement corresponds to a 1/1000th of a revolution of the motor. The motor movement cannot be expressed in mm, that makes no sense. As far as I know, as long as the encoders provide sufficient...
by rew
30 Mar 2016, 12:08
Forum: Related Hardware
Topic: Web server for configuration and analysis
Replies: 3
Views: 2557

Re: Web server for configuration and analysis

Barney, you will have to adapt the bldctool to make it provide that service.
Or you can adapt bldc tool to work without a screen and put data into say files, and then write a PHP script to work with those files.
by rew
30 Mar 2016, 11:55
Forum: For sale, orders, etc.
Topic: VESC-based board(s) for sale....
Replies: 42
Views: 49001

Re: VESC-based board(s) for sale....

Here is my dummyload for testing: http://prive.bitwizard.nl/dsc06396_small.jpg http://prive.bitwizard.nl/dsc06397_small.jpg This is the board... Ehh. boards!. Left CPU, middle driver/current amp, right is power board. I had intended to put a heatsink on top, so I "hacked" the small capacit...
by rew
28 Mar 2016, 21:05
Forum: General
Topic: Compiling VESC firmware on Windows
Replies: 31
Views: 47758

Re: Compiling VESC firmware on Windows

Does it start compiling or is this the first message you get?
by rew
28 Mar 2016, 21:02
Forum: General
Topic: Is it possible to use the vesc for wheelchair hub motor
Replies: 9
Views: 3860

Re: Is it possible to use the vesc for wheelchair hub motor

Haha! So I guessed correctly that there were more decimal points missing. :-)
by rew
28 Mar 2016, 20:51
Forum: General
Topic: case for VESC
Replies: 10
Views: 5729

Re: case for VESC

12S is about 50V. 3kW, 50V is 60A. The current determines the heat-losses in the FETs. IRFS7530 at 1.15mOhm gives 4W per motor phase, or about 12W total. That will be in the FETs. Oh! there are also 1mOhm shunts. Two of them. So add another 7.2W from the shunts. The FETs also incur switching losses....
by rew
28 Mar 2016, 20:34
Forum: General
Topic: where does the mosfet temp value come from?
Replies: 6
Views: 3947

Re: where does the mosfet temp value come from?

I have been looking at the code.

The code is prepared for more sensors. One for the PCB (CPU? DRV8302?), one for each mosfet, and one for the motor.

However, in current implementations many map to the same physical sensor. This means that adding the sensors later on is easier I guess.

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