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by arvidb
30 May 2018, 23:57
Forum: General
Topic: Firmware for Rev4.12?
Replies: 2
Views: 78

Re: Firmware for Rev4.12?

HW4.1x and VESC6.x are hardware (pcb) revisions. 3.37, 3.38 etc are firmware versions. The firmware (any version) can be built for any hardware revision; you need to set a #define in conf_general.h, e.g. HW_VERSION_410 for HW4.10-4.12 or HW_VERSION_60 for VESC6.x. Don't flash a firmware built for an...
by arvidb
26 May 2018, 23:07
Forum: Hardware Problems
Topic: Low Voltage on 3.3V and 5V Pin
Replies: 8
Views: 416

Re: Low Voltage on 3.3V and 5V Pin

How did D5 blow up?

If the board draws 0.9 A at 18 V (>16 W!) then something should get quite hot quite fast!

The absolute maximum input voltage for the 3.3 V regulator (TC2117) is 6.5 V, so if you've subjected it to 7.5 V it might have died.

Where did you buy your DRV chips?
by arvidb
22 May 2018, 10:59
Forum: Hardware Problems
Topic: 3.3V Problems with VESC hw4.12
Replies: 4
Views: 129

Re: 3.3V Problems with VESC hw4.12

Also check the (soldering of the) other components involved in the 5 V supply: U3, L1, R17, R18, R19, C19, C21, C27 and C39 on the DRV side, and D4, C33, R21 and D5 on the other side. Did you mount D4 with correct polarity, for example?
by arvidb
20 May 2018, 11:28
Forum: Hardware Problems
Topic: 3.3V Problems with VESC hw4.12
Replies: 4
Views: 129

Re: 3.3V Problems with VESC hw4.12

With your VESC powered only by motor power, what are the voltages over C33 and C25 (the bypass caps for the 5 V and 3.3 V rails)?
by arvidb
08 May 2018, 15:59
Forum: General
Topic: DIFFERENTS CURRENTS
Replies: 3
Views: 119

Re: DIFFERENTS CURRENTS

Well, current in is the current pulled from the batteries, and current motor is the current supplied to the motor windings. They can differ since the VESC acts as a DC/DC converter: P = Uin*Iin = Umotor*Imotor. Since the motor voltage is lower than the battery voltage except when going full throttle...
by arvidb
03 May 2018, 21:28
Forum: For sale, orders, etc.
Topic: Buying HW4.12 solder paste stencils
Replies: 0
Views: 94

Buying HW4.12 solder paste stencils

Yeah, if you have solder paste stencils for HW4.12 that you don't need, I would be interested in buying a set. Thanks!
by arvidb
24 Apr 2018, 17:20
Forum: General
Topic: Make Upload Error
Replies: 6
Views: 276

Re: Make Upload Error

How are you powering the VESC? The target voltage seems strange.
by arvidb
20 Apr 2018, 11:43
Forum: FOC
Topic: Powerful torque at low speed
Replies: 1
Views: 209

Re: Powerful torque at low speed

Yes, the VESC limits the battery current and the motor current to their respective limits (as set in VESC Tool). It always does this, regardless of the voltage difference between input and output. This is a feature, meant to protect the battery, the VESC, and the motor. What are your configured moto...
by arvidb
12 Apr 2018, 17:29
Forum: Hardware Problems
Topic: VESC dead (no more lights) probably STM32F4 ?
Replies: 5
Views: 539

Re: VESC dead (no more lights) probably STM32F4 ?

Nice work replacing the STM32F4! It's of course impossible to say what's wrong, but it is conceivable that something happened to the DRV and/or MOSFETs when the STM32F4 got fried. I would check that the MOSFETs are OK, at least. If they are OK and everything else seems fine, maybe try swapping out t...
by arvidb
02 Apr 2018, 14:04
Forum: Hardware Problems
Topic: VESC dead (no more lights) probably STM32F4 ?
Replies: 5
Views: 539

Re: VESC dead (no more lights) probably STM32F4 ?

ChibiOS is part of the VESC firmware. So no need to flash that separately. You need to flash the bootloader and the VESC firmware with the STLink V2. (I don't think just the bootloader is enough for VESC Tool to connect, but I'm not 100 % sure.) Then you can use VESC Tool to upgrade the firmware ove...

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