Search found 943 matches

by rew
05 Apr 2016, 17:06
Forum: For sale, orders, etc.
Topic: VESC-based board(s) for sale....
Replies: 42
Views: 13349

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

New batch of CPU boards are baking in the oven....
The driver and power boards are ready except for the through hole stuff like connectors.
by rew
04 Apr 2016, 08:28
Forum: General
Topic: VESC in electric bicycle
Replies: 20
Views: 10436

Re: VESC in electric bicycle

2) Might require some tuning. I see VESC often "take off" without taking the rotor. Then after 0.12 or 0.45 seconds it does something that works and the motor starts turning. 3) VESC will use current-feedback. It will limit the current to the maximum for the motor or the maximum for the ba...
by rew
03 Apr 2016, 10:49
Forum: For sale, orders, etc.
Topic: VESC-based board(s) for sale....
Replies: 42
Views: 13349

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

I don't like the "stealing" of a partial voltage. Especially not with LIPOs. Running my test-motor at 3A (that's about the lowest it can go), the motor draws about the same amount of current from the 24V as the logic part.... And you might be leaving the controller on for a while. I'm cons...
by rew
02 Apr 2016, 12:03
Forum: Related Hardware
Topic: Hall Sensors -> SS411A?
Replies: 16
Views: 5519

Re: Hall Sensors -> SS411A?

I remember something about hall sensors often having open drain outputs, and that VESC does not have the pullups.

I don't remember clearly, so it could also be the other way around: I wanted to use the pins for something but the pullups were in the way.
by rew
01 Apr 2016, 07:21
Forum: General
Topic: Compiling VESC firmware on Windows
Replies: 31
Views: 13155

Re: Compiling VESC firmware on Windows

egrep is a shell script on my system. It reads:

Code: Select all

#!/bin/sh
exec grep -E ${1+"$@"}
.

If you change all occurrances of "egrep" in your Makefile into grep -E, You'll be fine.
by rew
31 Mar 2016, 16:05
Forum: For sale, orders, etc.
Topic: VESC-based board(s) for sale....
Replies: 42
Views: 13349

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

FYI: Current on 5V is more than I expected: about 70mA. Running the motor costs 2mA extra.... USB also costs something like that (but is included in the 70mA) a 7805 from the 12V should be able to handle that. So I'm counting on 100mA, 700mW for the 7805, and also 100mA (rounded up from my measured ...
by rew
31 Mar 2016, 16:02
Forum: General
Topic: Compiling VESC firmware on Windows
Replies: 31
Views: 13155

Re: Compiling VESC firmware on Windows

It is looking for the egrep binary. If that is not available, grep is an alternative. Just copy the grep binary over, or find the spot where egrep is mentioned in the makefile.
by rew
31 Mar 2016, 08:45
Forum: For sale, orders, etc.
Topic: VESC-based board(s) for sale....
Replies: 42
Views: 13349

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

After measuring the current on the 12V and 5V, I'm moving to a 25x25mm step-down board for the 12V. And simply a 7805 for the 5V. (I expect about max 50mA on the 5V, and similar on the 12V). The above is my current debugging setup (I think I'll be moving it to my bike for reliability testing), the n...
by rew
31 Mar 2016, 08:33
Forum: General
Topic: Current control gain
Replies: 4
Views: 1793

Re: Current control gain

And both in current control mode?
by rew
31 Mar 2016, 08:24
Forum: General
Topic: Compiling VESC firmware on Windows
Replies: 31
Views: 13155

Re: Compiling VESC firmware on Windows

Make is telling you that somehow it didn't manage to find that rule. It says; No rule to make .elf! So that rule is not executing. Not because of anything IN the rule, but because it didn't find THAT rule. For your convenience I added echo BLALBLA on line 234 of the rules.mk file and when I type mak...

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