final stage

mandreas · 2016-08-03 03:34:01

a video of the new vat detachment system:

mandreas · 2016-08-21 20:51:48

Hi Shahin,

I deleted the breadboard, and welded components in a board with copper contacts, I noticed a significant improvement performance , nevertheless, occasionally occur crashes and freezes on RPI3,
Now i've a doubt, that is, my stepper motor is a nema 17 with 24vol absorption, perhaps the circuit you designed is compatible with 12-volt motors? I 've, by chance, take some diode a part to make it compatible with the 24 volt motor?

thanks for your patience

Last edited by mandreas (2016-08-21 20:52:51)

Shahin · 2016-08-22 04:31:55

We use 12v motor. But wiring to the motor completely separated from RPi power. Usually most of the times freezes on RPi caused by power issues on v5 line. Please, share debug file so we could make sure it is the case.

I will ask our electronic guy to see, if motor's wiring could handle v24 motors or not.

Shahin · 2016-08-22 05:40:23

You need to change IC1 component (7806) to something more appropriate for 24v motor.
He suggest to add buffer between servo and rpi to make sure stepper does not reverse the voltage to the board and cause freezes.

mandreas · 2016-08-22 08:03:11

Shahin wrote:

You need to change IC1 component (7806) to something more appropriate for 24v motor.
He suggest to add buffer between servo and rpi to make sure stepper does not reverse the voltage to the board and cause freezes.

thanks a lot for everything,

I will follow the road
,
I attach the debug files :
https://drive.google.com/open?id=0B4QD7 … WlWTWJLd0k

mandreas · 2016-08-22 13:09:56

Googling around I found this scheme to protect Rpi from return peaks...

http://www.petervis.com/Raspberry_PI/Ra … ction.html

Shahin · 2016-08-22 20:30:01

Please, share another debug info after crash. Everything looks fine on the surface.

mandreas · 2016-08-22 20:59:09

https://drive.google.com/file/d/0B4QD7f … sp=sharing

Shahin · 2016-08-23 03:55:21

Could you try ssh into the device after crash? Run top or similar commands to see if anything looks resources extensively.

mandreas · 2016-08-23 14:10:19

Hi Shahin,

I launched a print session, without turning the projector on (which ,I think is not the cause of my problem) ,after layer 810 I got a freeze, and, as your instructions I photographed the situation in ssh putty, with the top command,...
https://drive.google.com/open?id=0B4QD7 … mlOTlRvMkE

Last edited by mandreas (2016-08-23 14:13:22)

Shahin · 2016-08-23 16:37:20

Andrea,

I see some sign of system crash and freeze. But if you can ssh into device after printer crash. It is software level issue. If it is software issue, it is not clear one.
Could you let me know if the system still reachable after crashes/freezes?

Do you have any other rpi around to test again?

mandreas · 2016-08-23 18:08:25

No, unfortunately I have only this Rpi,

I repeated the test (open printing session , up to the block),

https://drive.google.com/open?id=0B4QD7 … XBsSHIwN0U

after which I opened putty, in fact, appear data movement ....

https://drive.google.com/open?id=0B4QD7 … VRwT3RSaUk

Shahin · 2016-08-24 06:19:22

Did you had same issue with the previous versions? Is it happens for any plate or particular plate?

I will try run my own printer with your settings to see if I could reproduce it.

mandreas · 2016-08-24 07:58:20

Thank Shahin,

then the question is a bit complex:
my threaded screw has 5 mm pitch, https://drive.google.com/open?id=0B4QD7 … 2JvVWpqY3c
I've used so far 1/8 microstep, but in the setup box "leadscrew Pitch" put the value 1.249 (I do not understand the meaning, but it worked) with the new version I noticed, however, with that value: from 0 mm to 100 mm get correct, but from 0 to 200 mm I get about 210 mm, it means that the step seems to increase.
I tried to put the microstep of 1/32, put on the "leadscrew pitch" value of 5 mm (as it should be in my case), and this time the step is steady and precise, in addition it is very quiet.
I launched a print session, with 500 layers, and everything worked well until the end, I have now launched a 1200 layers session .. will see

P.S. with the new version I had erased and rewritten all print profiles and re-rerun the plate processing

Shahin · 2016-08-24 08:07:27

Leadscrew Pitch is distance travelled with one turn of leadscrew.

mandreas · 2016-08-26 00:04:02

Hi Shahin,

Today the DM542 driver arrived, already installed, easy to set up, it seems a good solution for my 24 volt stepper , quiet and precise, for the moment had no hitches.
Do you have any idea about the possibility that the software produces frezee?
Thank you

Shahin · 2016-08-26 04:46:08

I have seen only one error on nanodlp log files shared by you. And it could be result of power off or anything else. If it is software problem, we need to check out more error logs.

mandreas · 2016-09-04 09:51:25

to solve my hardware problems, I connected a Mega 2560, with Marlin firmware, I was sorry to lose the simplicity and immediacy of the configuration, typical of Rpi, but on the other hand I can now say that the system is stable and works as a fairytable, in short, I think it is the last post on this topic,
Thanks again Shahin

Shahin · 2016-09-04 19:43:52

Probably we need some kind of buffer for Stepper Driver <=> RPi. Personally I have to experience any crash / freeze. But if Mega solved your freeze issue, we have some kind of power problem.

nanoDLP

#51 2016-08-03 03:34:01

Re: final stage

#52 2016-08-21 20:51:48

Re: final stage

#53 2016-08-22 04:31:55

Re: final stage

#54 2016-08-22 05:40:23

Re: final stage

#55 2016-08-22 08:03:11

Re: final stage

#56 2016-08-22 13:09:56

Re: final stage

#57 2016-08-22 20:30:01

Re: final stage

#58 2016-08-22 20:59:09

Re: final stage

#59 2016-08-23 03:55:21

Re: final stage

#60 2016-08-23 14:10:19

Re: final stage

#61 2016-08-23 16:37:20

Re: final stage

#62 2016-08-23 18:08:25

Re: final stage

#63 2016-08-24 06:19:22

Re: final stage

#64 2016-08-24 07:58:20

Re: final stage

#65 2016-08-24 08:07:27

Re: final stage

#66 2016-08-26 00:04:02

Re: final stage

#67 2016-08-26 04:46:08

Re: final stage

#68 2016-09-04 09:51:25

Re: final stage

#69 2016-09-04 19:43:52

Re: final stage

Board footer