Hard Driver motor - Page 3 - Electronic Circuits Projects Diagrams Free

Papabravo · 29th May 2008, 09:16 PM

Quote:

Originally Posted by Leftyretro

I think you are describing the smaller motors used in R/C servos. I was referring to the much larger Brushless DC motors used to power the plane via a propeller.

Brushless Motors for RC Electric Flight from Hobby Lobby!

Lefty

You are correct, I had not considered that a possibility. So do the propellers have a fixed pitch or can you chnage the pitch as well?

AtomSoft · 3rd June 2008, 03:17 PM

Just found a broken printer and took out the stepper from it. Not sure which pin is what tried the resistance thing but i get like:

_Pins_
1 & 2 = 3.0 Ohms
1 & 3 = 0
1 & 4 = 0
-----------
2 & 3 = 0
2 & 4 = 0
-----------
3 & 4 = 3.0 ohms

Now what?

ericgibbs · 3rd June 2008, 03:30 PM

Quote:

Originally Posted by AtomSoft

Just found a broken printer and took out the stepper from it. Not sure which pin is what tried the resistance thing but i get like:

_Pins_
1 & 2 = 3.0 Ohms
1 & 3 = 0
1 & 4 = 0
-----------
2 & 3 = 0
2 & 4 = 0
-----------
3 & 4 = 3.0 ohms

Now what?

Hi atom,
I dont think you mean 0

hm:, is it really infinity.?

If you still have Oshonsoft sim set up, look at the stepper motor module.

Regards

Look here:
http://micromouse.cannock.ac.uk/motors/L297.pdf

bryan · 3rd June 2008, 03:47 PM

EM-2 Linker error: “could not find file ‘c018i.o’”
Enter the proper directory path in Project>Build Options…>Project General tab. Set
the Library Path box to “C:\mcc18\lib”. c018i.o is the start-up library for MPLAB
C18. It sets up the stack, initializes variables, then jumps to main() in the application.

Quote:

Originally Posted by AtomSoft

For some reason i get this error.. the thing is that the file is
there im using ver 8 of MPLABError - could not find file 'c018i.o'.
Errors : 1[/code]

AtomSoft · 3rd June 2008, 04:40 PM

There is nothing wrong with my path setup i checked multiple times. Everything is setup ok just still get same error.My work around was to set it under:
MENU | Projects -> Build Options -> Project... C18 tab

Quote:

Originally Posted by bryan

EM-2 Linker error: “could not find file ‘c018i.o’”
Enter the proper directory path in Project>Build Options…>Project General tab. Set
the Library Path box to “C:\mcc18\lib”. c018i.o is the start-up library for MPLAB
C18. It sets up the stack, initializes variables, then jumps to main() in the application.

AtomSoft · 3rd June 2008, 04:45 PM

Yeah infinity i suppose i dont know how to make that sign tho lol ∞

Quote:

Originally Posted by ericgibbs

Hi atom,
I dont think you mean 0

hm:, is it really infinity.?

If you still have Oshonsoft sim set up, look at the stepper motor module.

Regards

Look here:
http://micromouse.cannock.ac.uk/motors/L297.pdf

AtomSoft · 3rd June 2008, 04:51 PM

ok i think i get it now but at what speed should i send a Pulse? or is it trial and error depending on what im trying to do with it?

AtomSoft · 4th June 2008, 12:02 AM

Using PORT a 4:1
ok im trying this code and no luck but i feel it trying:

Code:

#include <p18f1320.h>
#include <delays.h>
#pragma config OSC = INTIO1, WDT = OFF, LVP = OFF, DEBUG = ON



void main (void){
  TRISA = 0b00000000; //output
  
  while(1){
     PORTA = 0b00000010;
     Delay10TCYx(1);

     PORTA = 0b00000110;
     Delay10TCYx(1);

     PORTA = 0b00000100;
     Delay10TCYx(1);

     PORTA = 0b00001100;
     Delay10TCYx(1);

     PORTA = 0b00001000;
     Delay10TCYx(1);

     PORTA = 0b00011000;
     Delay10TCYx(1);

     PORTA = 0b00010000;
     Delay10TCYx(1);

     PORTA = 0b00010010;
     Delay10TCYx(1);

  }
}

Sceadwian · 4th June 2008, 01:29 AM

You could send a static 'start up' sequence to the motor to get it started spinning, then using a hall effect sensor or some other feedback to determine the motor spindle speed/phase you could dynamically adjust the speed of the motor until the desired RPM was reached. I'd like to see someone test one of these to destruction, because if you can drive the pulses fast enough and synchronize them the only limit to the speed of the motor is mechanical failure or the torque being insufficient to increase speed at some point.

AtomSoft · 4th June 2008, 02:35 AM

How woul di go about sending this startup sequence? speed isnt a factor yet if i cant get it to spin at all lol

Quote:

Originally Posted by Sceadwian

You could send a static 'start up' sequence to the motor to get it started spinning, then using a hall effect sensor or some other feedback to determine the motor spindle speed/phase you could dynamically adjust the speed of the motor until the desired RPM was reached. I'd like to see someone test one of these to destruction, because if you can drive the pulses fast enough and synchronize them the only limit to the speed of the motor is mechanical failure or the torque being insufficient to increase speed at some point.

ericgibbs · 4th June 2008, 08:43 AM

Quote:

Originally Posted by AtomSoft

How woul di go about sending this startup sequence? speed isnt a factor yet if i cant get it to spin at all lol

hi atom,
These links will give you an idea of whats required.

Stepper Motor Experiments
Art's Theremin Page: Bipolar Stepper Motor Control Circuit
http://web-ee.com/images/stepper.gif

Check the 'phasing' of the two windings, by using a 5V supply, energise each coil in turn
and observe the direction of rotation of the motor.

A start up sequence is not required, the rate of the pulses to the two coils will determine the motor speed.

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3rd June 2008, 03:17 PM	(permalink)
AtomSoft	Just found a broken printer and took out the stepper from it. Not sure which pin is what tried the resistance thing but i get like: _Pins_ 1 & 2 = 3.0 Ohms 1 & 3 = 0 1 & 4 = 0 ----------- 2 & 3 = 0 2 & 4 = 0 ----------- 3 & 4 = 3.0 ohms Now what? __________________ AtomSoftTech.com My YouTube Videos! My Favorite Stores: dipmicro Electronics SparkFun Electronics Futurlec BG Micro

3rd June 2008, 04:51 PM	(permalink)
AtomSoft	ok i think i get it now but at what speed should i send a Pulse? or is it trial and error depending on what im trying to do with it? __________________ AtomSoftTech.com My YouTube Videos! My Favorite Stores: dipmicro Electronics SparkFun Electronics Futurlec BG Micro Last edited by AtomSoft; 3rd June 2008 at 04:52 PM.

4th June 2008, 01:29 AM	(permalink)
Sceadwian	You could send a static 'start up' sequence to the motor to get it started spinning, then using a hall effect sensor or some other feedback to determine the motor spindle speed/phase you could dynamically adjust the speed of the motor until the desired RPM was reached. I'd like to see someone test one of these to destruction, because if you can drive the pulses fast enough and synchronize them the only limit to the speed of the motor is mechanical failure or the torque being insufficient to increase speed at some point. __________________ "Because I be what I be. I would tell you what you want to know if I could, mum, but I be a cat, and no cat anywhere ever gave anyone a straight answer, har har."