Thanos AMC1.6 USB 2DOF Motion Controller

[vicpopo]

Hi Thanos ,

A quick demonstration using your AMC 1.6 with Prilad SW and FW and Speedy nmofset h-bridge.

http://www.x-sim.de/forum/viewtopic.php?f=43&t=246&start=80#p3032

Many Thanks

Best Regards

[tronicgr]

The feedback potentiometers are wired the same way as the AVR1.5, no problem on that one! I even reversed wired them to see if that was the problem!
Also, I reverted back to X-Sim2 to check if that was the problem. I guess it wasn't.
jsmith2307

Hi

Yes, but they still are not attached on the motor. At least that is what I understand from the video. In order for the potentiometers to be called "Feedback" potentiometers, they should report back to the AMC the position of the motor output (axle rotation position).

Also make the limits smaller. I see on the video they are set to 41%... Try 10-15%.

Thanos

[jsmith2307]

Greetings,

Yes, but they still are not attached on the motor. At least that is what I understand from the video. In order for the potentiometers to be called "Feedback" potentiometers, they should report back to the AMC the position of the motor output (axle rotation position).

I've separated my potientiometers now I have only one installed, on maximal turn downward upward I get 34% to 93%, then I attach the third potientiometer, and I get 5%-95%, when nothing but the 3Rd is attached I get from 5% - 95% on the pot3. On pot1 using my test I get 34% - 93% max turn. What do you think?
jsmith2307

[tronicgr]

You need all three potentiometers connected on the AMC1.6 board at all times.

The first two potentiometers should be also mechanically connected to the motors axles or somehow to measure the position. Each one to each motor you have.

The third potentiometer can be turned by you to set the limits, then leave it alone but still connected on the AMC board.

If you keep plugging- unplugging potentiometers you will get confused...

Thanos

[jsmith2307]

Greetings,
It worked!!!! I guess the 3rd pot and 10% does the trick!! I can't THANK you enough. Now, I have to work on getting this thing in the air!
jsmith2307

[tonquites]

Thanos Hello, I have a doubt the processor is this right here? ATMEGA644-20PU

This I found the ATMEGA644-20PU, 20PU has end, so I was confused.

hugs
Everton

Portuguese version

Olá Thanos, tenho uma duvida o processador é este aqui mesmo? ATMEGA644-20PU

Este que eu encontrei o ATMEGA644-20PU, tem final 20PU, por isso fiquei confuso.

Abraços
Everton

[tronicgr]

Hi,

This is the correct chip yes, the 20PU in the end just indicates its maximum crystal frequency. There are 10L chips too that cannot go over 10Mhz for example.

Thanos

[vicpopo]

Hi,

As Thanos requested to me I post the video for his last test with :

his new SMhb2.2 + optolink 1.0 + amc1.6 FW g

Here is the link for the video :



For the optolink he changed the way to power it:

Original : Zener 5.1 + resistor 470 Ohms
New: regulator 7805 + capacitor 22 micro farad

His commentary:

I removed the zener and the resistor completely because of parasitic noise in the power lines and replaced it with a LM7805 and a 22uF capacitor.

Some pics:

image.jpg (625.06 KiB) Viewed 5326 times

Modification

image.jpg (826.28 KiB) Viewed 5326 times

image.jpg (858.28 KiB) Viewed 5326 times

Amc + opto + SMhb

For the mofset he used a mofset which can drive high current the irfb3207.You can also take irfb3205 ,irlz44n ,it depens the motors you want to drive.

image.jpg (865.24 KiB) Viewed 5326 times

PS: if is not the right place to post this , the moderators will move it .

[thecure]

can you control a motor which this values (500 w 24 v) ? tks

[tronicgr]

Not so sure about 500w motor. I designed it as a cheap alternate for wiper motors. Just to add the pwm is between 5% and 95% so it can avoid shot through situations.

Thanos