Tronic's AMC motor motion-controller with pwm/servo output

Re: Tronic's PWM/servo control Interface with encoder/pot input

Here is an updated list with the H-Bridge from mouser.com and newark.com

let me know if I forgot something

Thanks
Matt

Re: Tronic's PWM/servo control Interface with encoder/pot input

Hi Matt

These parts are not suitable for PCB thru hole mounting:

DSMhb (Hbridge):
MM74HC08MX (SMD...) PDIP type is needed
70543-0038 (WRONG type...)


AVR motion controller:
MAX232IDW (SOIC-16 Wide...) PDIP type is needed
695-HCM49-102-U (SMD...)

I checked my hbridge part list and found that I was made a typo error. The 2.5Kohm resistor is actually 1.5Kohm!!! On the silk layer is displayed the correct value! Sorry...

And its better to use 1N5819 as I did, that can handle even bigger voltage (40Volt!!)

If its possible you should order all the resistors to be with 1% presicion (not 5%) especially for the H-bridge that is an analog part and much depends from the resistors values!!


Another thing, is about Molex parts, I've seen that they sell the metal pin parts of them too high price on your list, you have 210 of this metal pin part that from a quick calculation I got the result 29,4$ !!! They are expensive! I suggest you to just use simple male SIP rows on the PCB (cut them to the size you want) and make the connection cables using their female SIP connectors soldered on a normal flat stripe ribbon cable! See photos:




And you choosed a different P-channel mosfet? I'll have to see if its compatible with IRF4905!

Regards, Thanos

Re: Tronic's PWM/servo control Interface with encoder/pot input

I'll use them in future firmwares to let the user set various settings. :schreiben:

Not used yet, but better set them to value 0 to prevent them interfere with ISP ponyprog firmware programming...

Regards,
Thanos

Re: Tronic's PWM/servo control Interface with encoder/pot input

I have made the changes to the avr and switched distributors and let me know what you think some of the manufactures I didnt change but the same part

Re: Tronic's PWM/servo control Interface with encoder/pot input

Hi Matt,

It looks good.

Just search for another part in place of 13J1657, as it is SMD type and not usable to us.

Regards, Thanos

Re: Tronic's PWM/servo control Interface with encoder/pot input

Hi Matt,

You seem to forgot to add the 100nF/100volts Capacitors (they write on them 104) on both part lists! :

Regards, Thanos

Re: Tronic's PWM/servo control Interface with encoder/pot input

I have made the changes to the list

Thanks for everyone's input
Thanks Tronic for all you do

Re: Tronic's PWM/servo control Interface with encoder/pot input

Hi,

I also updated the partlist here on the first post. Added some missing parts, and the Photo partlist is updated with new correct pics now.

I will add some new firmware soon based on lower crystal clocks and possibly with 3 DOF support. I measured the code cycle of the PWMBeta001 firmware to be 307hz (307 times per second!!!!!)
According to this site (http://www.sengpielaudio.com/calculator-period.htm) the period is 3.257ms !!!

Already implemented a 6DOF firmware that outputs in 6 simple RC servos (fully tested) in a code cycle rate of 46Khz!!!!! (or in plain words 46000 times per second)!!! The period here is the extraordinary value of 0.0217ms or else 21.7us!!!

Can't wait to see the code cycle rate of a PWM 6DOF firmware on a Atmega644... ;-)

Regards, Thanos

Re: Tronic's PWM/servo control Interface with encoder/pot input

Hi,

I got several complains that there was problem with communication of the AMC (Avr Motion controller 1.5) with USO. So I made a one by one compare of my prototype AMC with the plans I gave... Guess what... I found that I gave wrong value to one resistor... It supposed to be 270 Ohm, while I gave a 220 Ohm value for it on the PDF plans and the Part list...

Here is the resistor that causes the problems and need to be changed with a 270 Ohm!




I wish I had seen it before, but I when I used this resistor on my prototype PCB I had it in bag marked as 220 Ohm... So during checking it again now I noticed the different color stripes on it and measuring it with a multimeter ended up to be a 270 Ohm :-( I still can't believe that this 50 Ohm difference is so critical!

I Updated the PDF plans on the first post and I'll fix the part list too later.

Sorry for the inconvenience! Its under beta yet after all!

Regards, Thanos

Re: Tronic's PWM/servo control Interface with encoder/pot input

Its a pity that I've sent you my interface yesterday.
Dont mind. Now I've waited so long to move my sim, now some days more wont make a difference anymore

I just have been wondering how I could have made a mistake. Just some res and caps, and all critical parts socketed and I was not able to establish an USO connection :jinx:

regards
Chrisitan

Re: Tronic's PWM/servo control Interface with encoder/pot input

Hi, Christian,

Yes, I hope that this was the last bug ... I want to move on to the 6 DOF AVR ultimate motion controller and these kind of problems just keep me back, trying to find solutions...
:


Anyway, I have ready the 6DOF firmware for six simple RC servos in case Sirnoname interested to built a small prototype rig for testing his new Profiler2... The same firmware is now using John (planmix) for his 6DOF motion software for FSX!
:yippiee:

http://www.youtube.com/watch?v=XascejIH62s

The 6DOF RC servo firmware can be used with the last AVR motion controller v1.5 but with a smaller crystal of 22,1184 Mhz (22.118.400 hz). No mixing is done in it and every axis motion is independent from the others.

115KRC6DOF001.zip

As I have said before the coderound cycle is 46Khz (checks the USO 46000 times per second) with period of 0.0217ms or else 21.7us, uses 115Kbps serial speed and the USO string that commands it could be:

AB~1~~2~~3~~4~~5~~6~

where the 1,2,3,4,5 and 6 numbers represent the six axis.

For the test that each axis was reading ok with the current Profiler 1.6.9 , I used this string: AB~x~~y~~x~~y~~x~~y~

EDIT: To connect the six servos I used the four servo ports of the AVR montion controller v1.5 for servos 1-4 and the ADC ports 7 & 8 for the 5-6 servos!

Regards, Thanos

Re: Tronic's PWM/servo control Interface with encoder/pot input

Hi,

As I had many requests that it was not easy find all the info I gave about my electronics, I decided to collect them all in a single zip file that is easy to download... :thbup:

http://ptyxiouxos.net//greekbotics/user_projects/Flight_Simulator/AMC1_5_DSMhb1_2.zip

I hope that will help many people... Later I might compile a Html guide thru all these files to also use on my website.

Regards, Thanos

Re: Tronic's PWM/servo control Interface with encoder/pot input

Hi,

It will be not much time before we will see some motion sim cockpits fully working and interfaced with my AVR electronics!
I almost feel shy that I had not much time to put all the parts together and use them on my joyrider first. : Any time I wanted to focus and finish it, something new was getting in the way...

One of them, that have all ready, is Erich, that he kindly send me some photos of his boards!



8

9

His motion sim is a 2DOF joyrider-like cockpit but with all-metal welded frame! I hope that we will have video from it in action soon! At least sooner from mine...

Thanks Erich! :

Regards, Thanos

Re: Tronic's PWM/servo control Interface with encoder/pot input

Hi,

After general request for PDF PCB layouts that are placed in single page, I made single pdf layouts for some of my boards:

avr_motion_sim_PCB_single_1_5.pdf
avr_motion_sim_PCB_bottom_single_1_5.pdf
avr_motion_sim_PCB_bottom_single_1_5_filled_ground.pdf

And the PWM signal to simple h-bridge inputs converter:
Dual_PWM_to_simple_hbridge_v1.pdf
Dual_PWM_to_simple_hbridge_v1_bottom.pdf

Also included Top and Silk layer for reference reasons only. Use only the PDF that is marked as bottom to send to the etching service.

Thanks,

Regards, Thanos

Re: Tronic's PWM/servo control Interface with encoder/pot input

Hi

I had the chance to test personally Egoexpress's AVR motion controller and DSMhb boards and here are some photos and video:

http://www.youtube.com/watch?v=v3hJ30ixN0s












Enjoy :

Regards, Thanos

Re: Tronic's PWM/servo control Interface with encoder/pot input

Hi Thanos,

your parcel arrived yesterday. I have been able to pick it up today. I'll try my best to set up the sim until tomorrow evening.

Thanks alot!
:skoal:

Regards
Christian

Re: Tronic's PWM/servo control Interface with encoder/pot input

Es geht los....

Re: Tronic's PWM/servo control Interface with encoder/pot input

Just an uptdate.

I had a little drawback. Today I noticed that the GND of the actuators pots have connection to the case. This causes some trouble. Now, I have to find a way to isolate the pots from the case.

Just wanted to tell you guys that it is nothing caused by Thanos' brilliant interface. Its just my acutators! :jinx:

Regards
Christian

Re: Tronic's PWM/servo control Interface with encoder/pot input

Hey..

Any news on the projekt, I am very interrested in hearing about it. Here are some picture of mine, its not finished but I hope to get the last parts monday or tursday.



I also bought 3 motors and some pots... ( only need some gears for the pots )

Re: Tronic's PWM/servo control Interface with encoder/pot input

HEY!!! Is this a mirrored photo or you have etched WRONG your PCB boards??????????

Thanos