[arisov77]

…So I though make a control unit with two encoder. Could it be possible ?...

I about this did not think. Probably in servocontroller on AtMega xxx this is not got, it is necessary to use more "powerful" specific microcontrollers.
But usually in expensive professional CNC machine two encoder use as follows: 1 encoder is installed on gross servomotor (without backlash) and signals with he enters on servocontroller, 2 encoders (linear) is installed on CNC machine and signal with he enters on CNC program (for correction of the exact displacement).

[celesket]

I have got Atmega8 and professional Programmer (Topmax). I cannot using PonyProg or Codevision for AVR-ISP programmer.
Please single file for Atmega8 (dump file).

[promehanik]

I am new in this thread.
I have question about performances of this servo controler and servo controler in thread 40940 (dsPIC). http://cnczone.com/forums/showthread.php?t=40940
Which is for higher frequences (motor speed)?
How much is max current for both drivers?

regards, prom

[cobree]

Hi really nice work you have done, I will test to build this board and test the software, I have an old servo motor 36V 6A i need to test, what I am missing is an encoder, I need to buy any suggestion?
If I build board should I use your ver 16 Michael?
I hope a can support you with some knowledge, perhaps documentation or manuals.
I will also try to use winarm later to use c instead.

This will be fun....

[arisov77]

I have got Atmega8 and professional Programmer (Topmax). I cannot using PonyProg or Codevision for AVR-ISP programmer.
Please single file for Atmega8 (dump file).

I have no such file (dump). Majority programmer must understand format .hex and .eep

…I have question about performances of this servo controler and servo controler in thread 40940 (dsPIC) http://cnczone.com/forums/showthread.php?t=40940Which is for higher frequences (motor speed)?

Theoretically on DSPIC velocity above, but practically - I do not know.

How much is max current for both drivers?

The maximum current any servocontrollers depends on applicable in them power MOSFET transistor.

… , I have an old servo motor 36V 6A i need to test, what I am missing is an encoder, I need to buy any suggestion?

What maximum velocity of the rotation of the motor? For majority of the using on my glance will be an optimum use the encoder with permit 500 imp/rotation.

If I build board should I use your ver 16 Michael?

I have not understood the question.

arisov,I have a big problem…

Moraru, how are you?
One acquaintance of mine I have written that he had a similar problems when increase the voltage of the feeding with variant of the PCB from Jozefp http://www.cnczone.com/forums/showpo...2&postcount=14
. Helped installing the capacitor 0,1 - 0,22mF directly beside pins 5 and 8 optocouplers HCPL-2631 (as it is recommended in DataSheet)

[mkran2543]

thank you

[alex7street47]

I need ELM_servo on ATMEGA-8 or ATMMEGA-128 in *.asm
since i couldn't find ATmega-88 & ATmega-48 on my local market.

i have difficulty's on UCSR error code in asm when i compile it
with simply change "m88def.inc" or "m48def.inc" to "m8def.inc"

please help.
thanks in advance.
Alex.

[MojsterMiha]

Hi,
I'v red a lot of posts but I couldn't find what is the maximum encoder input
frequency. I'm using now UHU controllers but I'm not satisfied any more, because they are still the same as in the begining. I need controller with higer encoder input frequency and with limit switch function.
Perhaps I can use this controller by my second project!?

Regards!

[arisov77]

alex7street47, for AtMega8 code (*asm) in message №1.

MojsterMiha, maximum frequency - I and know itself not . But she will less, than in UHU controller, since UHU servo works with Quartz = 24МГц, but this with Quartz = 16МГц (20МГц-for AtMega48)

[jvolk]

Hello.
I really like this controller, so I decided to redraw schematic in Altium Designer and draw a PCB.

I changed schematic. I added DC/DC converter to power isolated side (optocouplers)

I also added max232 to UART and capacitor to motor supply.

You can find schematic and rendered PCB in attachments.

[moraru]

Hello jvolk,

You did tested controller?

Moraru

[jvolk]

Hi moraru.

Yes I tested it. At first I draw pcb, ethc and solder it. Result is here:
[ame="http://www.youtube.com/watch?v=onts9ACsU34"]YouTube- Modified ELM servo motor controller[/ame]
This PCB on video is first version. Second version (2 posts back) have also capacitor on power line for motor. I also changed connector for step/dir and encoder (smaller).

[moraru]

Hello jvolk,

Congratulations, and I worked below 30V, but over this tension has not run properly.
Maybe I missed something.

[jvolk]

In my schematic I separate power for logic and power for motor.
I had 48V for motor and works like a charm.

You must miss something around power. Do you have regulated +12V and +5V if you go over 30V?

[moraru]

I have one 12v power supply , one 5v and other power supply for the motors .

[jvolk]

And what is happening if you go over 30V?

[moraru]

All parameters from my controller is erase, and set to ''0''.

[jvolk]

Can you post schematic or picture of your controller?

[moraru]

This is

[jvolk]

Huh..
You don't have 100nF on microcontroller's power line, do you? Connect 100nF near microcontroller. I suggest you add also 100uF electrolyt on +5V line. Why do you have separated GND, and then connected together at power connector?

"All parameters from my controller is erase, and set to ''0''. "
That's weird...