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Old Mar 13, 2014, 09:23 AM
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New Product
Alexmos BaseCam 3axis 32bit Brushless Gimbal Controller by Viacopter & Flyduino

With a new 32bit generation of 3axis Alexmos brushless controller knocking at the door, I´ll take the opportunity (on behalf of Flyduino and Viacopter) and start a new thread about this new masterpiece by Aleksey Moskalenko.

To keep the info of 8bit Alexmos and 32bit Basecam controllers devided, we will update all relevant informations here though most info on balancing, setup and tuning will stay valid.

Original Alemos 8bit controller thread:
http://www.rcgroups.com/forums/showthread.php?t=1815204





You can actually order the 32bit boards now - delivery of the first batch has started:
https://viacopter.eu/multirotor-shop...ticopter-store
http://flyduino.net/Alex-Mos-Brushle...-32bit-Basecam

Please read the manual first!



Please read the manual first!


New AutoTuning feature! Video by Aerialpixels



Before you start automatic tuning, its very important to properly configure hardware of your system:
motor outputs, “Power”, “Inverse” and “Number of poles” (latest 2 setting may be detected
automatically, as described in the user manual). Also, main IMU position should be configured and
accelerometer and gyroscope should be calibrated.


Alexmos 32 Bit V2.42B5 Autotune with GH4 (3 min 24 sec)



Board will work with 3S-6S lipos (8-25V)
Special driver IC´s being used to controll the motor driver, that helps to keep the mosfets cool during high current.
So it is possible to use 3A for each motor output.

The hardware will support all upcoming software features.

To configure the board you only need the USB Port and the Basecam Software (Windows, OSX, Linux)
which you can find here: http://www.basecamelectronics.com/

Or you can use a bluetooth module on the UART Port.



Technical details:

Voltage: 3S-6S
Current for each motor: 3A
board dimensions: 50x50
Hole pattern: 45x45mm, M3 holes



How to determin the correct IMUs for Cam & Frame:
http://www.rcgroups.com/forums/showt...6#post28470023


General info on the Basecam site:
http://www.basecamelectronics.com/simplebgc32bit/


New firmware & GUI 2.42b6 for 32bitters is ready to go:
http://www.basecamelectronics.com/downloads/32bit/


New Basecam Configuration Guide:
http://www.basecamelectronics.com/co...how/?newsid=69


Basecam 32bit Tuning Guide by Aerialpixels
http://aerialpixels.com/support/alex...-tuning-guide/


B32 Gimbal Controller User Guide by BeeWorks
http://static.squarespace.com/static...r%20Manual.pdf


GARUGs Review of the 32bit BaseCam Controller
http://www.rcgroups.com/forums/showthread.php?t=2178272


Spreadsheet by Soul Patch Films for PIDs and other settings for different gimbals/motors
https://docs.google.com/spreadsheet/...=sharing#gid=6




You can download a PDF with examplary PIDs & settings by Archikopter from the attachments below.




How to configure the new IMU (small format) for either Cam or Frame IMU



Close the appropriate solder jumper:
A0 is adress low (0x68), CAM IMU (default)
A1 is adress high (0x69), Frame IMU

If you only have 1 IMU it will default to CAM IMU, no matter what the adress is.











If you want to use this BT Module



to connect the 32bit AlexMos/BaseCam, set the Paritiy to EVEN on the Bluetooth Modul.


Establish a connection (the appropriate COM port @ 115200baud) between the BT Modul and an FTDI/USB-UART module (RX->TX, TX->RX, GND, 5V) and use Putty or any similar Terminal Emulator to set the Paritiy to "even" with this AT Command:

at+uartmode0,2

Type or copy it into the console and press enter within 5 seconds. Nothing else needs to be changed.

HC-04 AT Commands and General Info


HowTo Flyduino Serial Bluetooth Adapter for 32bit BaseCam Alex Mos SimpleBGC (0 min 58 sec)





New Android App
https://play.google.com/store/apps/d...soft.simplebgc




Basecamelectronics Alexmos Android APP Preview Insteadi Electra Pro (3 min 33 sec)


Alexmos SimpleBGC App for Android Setup with Bluetooth Module (1 min 11 sec)






Demonstration of the new firmware 2.4

New Alexmos 32-bit with two IMU's! (1 min 17 sec)


SimpleBGC 2.4 firmware (3 min 12 sec)


AlexMos 2.4 Firmware - Quick Review (8 min 34 sec)


Setup & Tuning of 2.4 firmware

SimpleBGC PID Tuning - 2.40 b6 FW (44 min 12 sec)



Alexmos 32Bit Joystick with Menu Button Setup (3 min 46 sec)




Stay tuned and come back to this page more often since informations will change as we go.


Norbert
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Last edited by kinderkram; Aug 17, 2014 at 04:19 AM.
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Old Mar 13, 2014, 10:35 AM
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Thanks, Norbert. I am sure you will take good care of the crowd....
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Old Mar 13, 2014, 12:07 PM
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May sound like a silly question, but what is the advantage of the 32 bit system. Faster processing = better reaction times?
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Old Mar 13, 2014, 12:58 PM
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thinking that to....a more robust system than 8bitty anyway ,,,, how much better only time will tell... the next chapter of gimbal
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Old Mar 13, 2014, 01:28 PM
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My guess is we wont see the big benefits until we get software that takes advantage of the processing power.
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Old Mar 13, 2014, 02:09 PM
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I am sure there have been many tweaks to the firmware to take advantage of the 32 bit Processor. From what I have seen the dual IMU should be an excellent addition. On the web page it states: Optional second IMU, that will increase the short-term precision of the stabilization 10x-30x times and will make stable work in any frame position.
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Old Mar 13, 2014, 02:16 PM
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Quote:
Originally Posted by AlexnderH View Post
May sound like a silly question, but what is the advantage of the 32 bit system. Faster processing = better reaction times?
In general it provides a finer resolution, therefor the ability for a more precise operation.
Always depends on the firmware that needs to make use of the advantages.

More & more FCs have been switching to 32bit ARM processors lately, so this will be the future anyway.

Other than the processing power the new boards provide many advantages over the v1/v2 boards like MosFets, up to 6s and 3A output for real big motors which can be used for huge gimbal motors, swinging heavy cameras of all kind.
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Old Mar 13, 2014, 03:44 PM
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The more I hear the more excited I get, 6s happiness.
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Old Mar 14, 2014, 08:46 AM
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I was wondering if you could post the part number for the on board connector that would be required to add on the second IMU?
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Old Mar 14, 2014, 09:19 AM
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It´s a 4pin JST-SH connector. To build a harness you´d need something like this:
https://www.sparkfun.com/products/10359

Haven´t found a pre-assembled harness with 2-into-1 plugs yet.
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Old Mar 14, 2014, 10:48 AM
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I guess you could buy an extra socket and make your own Y harness. I could only find Ys in three wire.
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Old Mar 14, 2014, 03:23 PM
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Can an extra imu sensor be used with the normal 8 bit 3 axis boards mounted on the copter frame? Or does it not work that way?
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Old Mar 14, 2014, 04:18 PM
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Quote:
Originally Posted by AlexnderH View Post
Can an extra imu sensor be used with the normal 8 bit 3 axis boards mounted on the copter frame? Or does it not work that way?
In fact the v1/2 boards already can use the data of a second IMU - the flight controllers` via the FC inputs.
So it shouldn´t be a big deal to use an I2C IMU as reference instead.

But ... we won´t mix up 8bit & 32bit stuff here, will we? .
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Old Mar 14, 2014, 06:24 PM
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I"ve experienced many issues with alexmos near cell towers, high voltage lines, radio towers...
I was told this is because I2C errors... Ferite rings, pull up rezistors only partially cure that...
So why no one thinks about getting rid of I2C and using different bus between IMU and controller? I was hoping this was the plan for future, but here I see the same approach?
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Old Mar 15, 2014, 12:47 AM
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Quote:
Originally Posted by alfi666 View Post
I"ve experienced many issues with alexmos near cell towers, high voltage lines, radio towers...
I was told this is because I2C errors... Ferite rings, pull up rezistors only partially cure that...
So why no one thinks about getting rid of I2C and using different bus between IMU and controller? I was hoping this was the plan for future, but here I see the same approach?
SPI could be a good option, its less prone to errors by EMIs and its available in the mpu6000.
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