servo motor resets 16f877a

[skimask]

Servo stiil slower than usual mode

Does it speed up if you disconnect one at a time?
The PIC won't (i.e. shouldn't) care if there's 1, 2, or 3, or more servo's plugged in since it's not reading anything back from them.

[burak450]

Does it speed up if you disconnect one at a time?
The PIC won't (i.e. shouldn't) care if there's 1, 2, or 3, or more servo's plugged in since it's not reading anything back from them.

When I used single servo and used this code.Everything was perfect.Object followed by servo perfecly.(left-right position)

DEFINE LCD_DREG PORTB
DEFINE LCD_DBIT 0
DEFINE LCD_RSREG PORTB
DEFINE LCD_RSBIT 4
DEFINE LCD_EREG PORTB
DEFINE LCD_EBIT 5
DEFINE LCD_BITS  4
DEFINE LCD_LINES 2
DEFINE OSC 4                                                                       
DEFINE ADC_BITS     8       'A/D çevirim sonucu kaç bit olacak
DEFINE ADC_CLOCK  3       'Clock kaynağı (3=rc)
DEFINE ADC_SAMPLEUS 100
SYMBOL F=PORTA.0
SYMBOL G=PORTA.1
alta var byte
usta var byte
altb var byte
ustb var byte
ADCON1=2
TRISA=3
TRISB=0
PORTB=0
TRISC=0
LCDOUT $FE,1 
pause 2000
adcin  0,ALTa
ADCin  1,usta

t var byte
i var byte
T=150

yap:




adcin  0,altb
ADCin  1,ustb






if  ((((usta+10)*100)/(ustb+10)))>130 and (not (t>194)) then 
T=T+15
endif

if (((alta*100)/altb))>130 AND (not (t<51)) then 
T=T-15
endif


gosub motor





  

LCDOUT $fe,2,#usta," ",#ustb," ",#altA," ",#altb
lcdOUT $fe,$C0,#T   

goto yap

motor:
for i=0 to 25
PAUSEUS 20000-(T*10)
PULSOUT PORTC.2,T

next
return

end

second servo and new code =trouble
Now i unplugged a servo ,left-right position servo stiill slower and worked not properly..

Something wrong about codes you and me wrote....

[mackrackit]

Swap servos? What happens?

[skimask]

second servo and new code =trouble
Now i unplugged a servo ,left-right position servo stiill slower and worked not properly..

still slower and worked not properly.
That doesn't tell me much. Is your servo spitting out banana's again? Or is it making breakfast? both of which are not proper actions for a servo...

[Macgman2000]

OK I have got to ask. What are you moving with your servo? As I said in my previous email, 450 mA is fine for testing UNLOADED servos. Possibly 2 servos. If you are using "standard" size servos then 450 mA is just adequate for turning 1 or 2 without a voltage compression under load. Again.....what are you moving with the servo?

Nick

[burak450]

This video shows left-right perfect tracking...http://www.dailymotion.com/burak450/...orks-fine_tech

This video shows two servos crazy at the beginning..http://www.dailymotion.com/burak450/...-to-servo_tech

This video shows (when up and down motion)(no vibration in left-right motion) servo vibrates weirdly...http://www.dailymotion.com/burak450/...-of-servo_tech

Finally this video shows work of two servos up-down-left-right motion...http://www.dailymotion.com/burak450/...two-servo_tech

something like grrrrrrr sound means vibration

Vibration when up-down motion and crazy servo at the beginning make problems...

Thats why I said it didnt work (properly! )or well or correctly
I hope I answered all questions with videos...

[Macgman2000]

OK...just as I thought. Your power supply is not big enough. The other thing is you may need to get a larger servo to hold the turret vertically. The oscillation you see is the servo struggling to hold position and causing voltage dips because it is stalling. Get a 3A power supply from surplus, use several voltage regulators in parallel, filter with caps and get a metal gear servo to hold up the turret, they tend to be more heavy duty.

Nick

[burak450]

The other thing is you may need to get a larger servo to hold the turret vertically.

I dont think so, it can hold upto 10 kilos....Turret isnt a heavy thing...

Did I understand right?I need to have 9v 3A power supply...

several 7805 ?how many?2 enough?What do you think?