Recent Posts

21

Electronic Parts / want to connect my Arduino UNO

« Last post by mishmalik on July 11, 2017, 05:07:13 AM »

Hello !

I want to connect my Arduino UNO to a One Relay Switch Board.
I also want to connect relay to a Fan, TubeLight etc

Relay connections :  POLE, NO, NC,

Please can any one explain me the connections Please.

www.w11stop.com

22

Electronic Parts / want to buy arduino

« Last post by mishmalik on July 11, 2017, 04:41:56 AM »

Please help me in buying an Arduino starter kit. I am new to Arduino, and I am looking for Arduino starter kit. I found this starter kit via google http://www.w11stop.com/arduino-board-price-in-pakistan

23

General Discussion / Brushless Motor Theory

« Last post by Phebex on May 24, 2016, 05:20:58 AM »

i think it's fine om posting here.

i found interesting site
Check this site this site talk about Electrik Motor.
Even You can calculated here Winding Calculator.

From that site i found my brushless(14 magnet pole and 12 cogs) has Direction AabBCcaABbcC and AbCaBc

12P9C Brushless | Direction : A-B-C-A-B-C

LEVEL
A	1	1	1	0	0	0
B	1	0	0	0	1	1
C	0	0	1	1	1	0

14P12C Brushless | Direction : AabBCcaABbcC or A-b-C-a-B-c-

LEVEL
A	0	0	0	0	0	0	0	0	0	0	0	0
a	0	0	0	0	0	0	0	0	0	0	0	0
B	0	0	0	0	0	0	0	0	0	0	0	0
b	0	0	0	0	0	0	0	0	0	0	0	0
C	0	0	0	0	0	0	0	0	0	0	0	0
c	0	0	0	0	0	0	0	0	0	0	0	0

from here i'm confuse how to make diagram like you do. if I had to make a table size 12x6 (due in accordance with the number of his COG) or a 7x6. I do not know how to determine the level. I also attach a file containing the tables.

one more ask, in that site you can found winding animation.

fig. 01

when you click it there is any step for windings

fig. 02

Please tell me, that is step if i'll make a winding isn't?! not steps like you do in Driving a three-phase brushless DC motor with Arduino – Part 1. Theory

*My Attachment : Google Drive

24

Member Introductions / Re: Try to study here ;)

« Last post by Phebex on May 23, 2016, 01:49:03 AM »

That fine if you are busy now.

My Brushless is
MARSPOWER 220880T Brushless Gimbal Motor, you can google it, but hard to find datasheet.
there is 14 pole and 12 cogs.
Yes, after I tried to understand the theory of brushless (trigonometry). I also suspect that. there may be a step is missed.

Sorry if it makes you misunderstood. im not using h-bridge at a trial, This trial temporarily halted, because I'm ordering the item.

25

Member Introductions / Re: Try to study here ;)

« Last post by ElectroNick on May 22, 2016, 02:59:53 PM »

Hello Phebex,

Thanks for stopping by my blog/site.

I have to admit, it's been 5 years since I've done the original post you are referring to, and some of the finer details of the software would not be immediately apparent to me now. At least until a careful review, for which I have to admit I don't have a lot of time now. But I will try to at least validate some of your own concerns.

You are absolutely right - the phases of a 14-pole/?? cogs motor will be different than 12-pole/9cogs . You would need to modify the software to have more (I assume more - depends on the # of cogs) PWM steps. Otherwise the rotor will be skipping some of the positions which can lead to uncertain movements - sometimes the next    step in the software would result in the back step rotation of the physical rotor. Which is, I think is what you are experiencing.

I am not so sure how you can make it work at all without using an H-bridge. Arduino's  40mA outputs are not strong enough to drive anything in the physical world (maybe except for the tiniest of the stepper motors). Certainly not any gymbal BLDC I've ever seen. Perhaps you meant "no integrated H-bridge circuit", which would mean that you are using an H-brdge on discrete transistors? I don't know what you mean but if you did not, you should really look into employing one kind of an H-bridge circuit or another. Otherwise you will either fry your Arduino or it simply won't work.

Good luck!

26

Member Introductions / Try to study here ;)

« Last post by Phebex on May 20, 2016, 02:13:19 PM »

Hello, I'm a newbie here. I came here for 2 weeks ago.
First I want try to make Gimbal for steady cam. But I have nothing. I see many people have same interests with this.
So I'm hunt what I need to build one. Some people managed to make it by using arduino.
So, first think must I have is :
Arduino uno
Mpu6050 (gy521)
Brushless Gimbal motor
Breadboard

I have no knowledge at all about this. Find out anything about arduino code to make brushless rotate, googling about it.
Find your post (http://elabz.com/bldc-motor-with-arduino-circuit-and-software/) this awesome.

Try your code, but my brushless only shake. Do not know what was wrong at first. Keep reading your articles about Brushless. It makes me more and more insight. I known about pwm, sinusoidal, and etcetera. The Most important is know how brushless work.
For now I assume why my brushless didn't work with your code it's because my brushless using 14 pole magnet. Try with pwmsine for 8 bit make spinning/rotate then stop later. And I not using H bridge.

That's introduced by me.
Thanks

27

Motor Control / Re: Updated schematics for a BLDC motor controller

« Last post by ElectroNick on March 31, 2016, 09:39:05 PM »

Jannat, see if you can increase the stepDelay value so the phases are changing slower, and perhaps the pattern may be more clear . One other think I would suggest - comment out the serial communication code around line 71 in the code and re-compile and upload into Arduino again. That serial comm is too slow for the winding phase change and does mess up the normal motor operation. It was there for debugging, I don't know why I didn't take it out of the final code. It's been a couple of years since, I don't remember finer details of the project all that clear now.

28

Motor Control / Re: Updated schematics for a BLDC motor controller

« Last post by jbachhal on March 31, 2016, 12:55:55 AM »

Hello.
I recently built the circuit shown in the schematic and connected it to a voltage supply (3.3V) and the arduino programmed using the code provided. After the system is powered up and the potentiometer is adjusted, the motor simply jolts a tiny bit back and forth. I connected LED's in series with the motor windings in hopes of seeing the phase of the system. The bulbs illuminate however, are not in any sort of three phase pattern, instead light up in a strange pattern with a substantial gap before the next "cycle" starts. If you have any idea as to why this would be happening, please let me know as soon as possible as this project is one that must be completed very very soon.
Thank you for any help. It is greatly appreciated.

Kindly

Jannat

29

Motor Control / Re: Arduino BED stepper Manual Control

« Last post by PaulBailey on December 16, 2015, 12:03:18 PM »

Actually there is a way to make your own driver out of a whole bunch of MOSFET transistors  a heap of MOSFET drivers and a heatsink.
Also the issue of microstepping as well as current sensing and feedback would still have to be solved.
You can use an Arduino as a stepper driver, but it will run out of available I/Os really quickly.

circuit board manufacturing

30

Motor Control / Re: Arduino BED stepper Manual Control

« Last post by MarkN on July 05, 2015, 12:55:15 PM »

G'day All, by the number of "looks" at this site, I am sure, there are a lot of people looking for the same thing, that I want to do.
ie, to drive any AXIS, with a Stepper Motor ( with the appropriate torque) f/r and with speeed control. ( I am not going to correct that, extra "e" in speed, because it takes too long, tippy tapping on the key board, which is why, you should, when visiting, like a Fart in a Phone Box, just say G'day, or, For Ever, Hold Your Breath.)
So, anyways, here is the link......http://www.cnczone.com/forums/stepper-motors-drives/202996-cnc.html
to see where I am at, the moment. 'n it works, for under a A$100.00, she will drive my axis to heaven 'n back.
That, at least, deserves you to just say "G'day"
Otherwise, why do we even try....Hey!
Just love to hear your, tippy taps.
Mark Needham
or else " off"