final stage

mandreas · 2016-04-27 17:51:49

Dear Shahin,

I finished the connections, (only missing the servo motor for the shutter),
I followed the scheme carefully, and despite my nobbitude, I think I have done a good job, (the card is full of wires, but I have in future to make a printed circuit board) I set the parameters of nano DLP, (I have some doubts about the "micro-step" parameter, in SW I set 1/32 step), I turned on and luckily no nuclear explosion occurred,
the motor (17 nema , 1.5 amps per phase, 24 volts), it work and emits sounds, but does NOT move !!!,
in the the drive (Pololu drv8825) I set the potentiometer to 0.75 volts,
some advice?

Thank you

Shahin · 2016-04-27 21:07:56

Mandreas,

There is a long thread on the issue available on the forum.
To sum up things, there is a limitation on how many pulse you can send on rpi.
So use 1/8 micro-stepping with default speeds on setup page, if everything works as expected change default values.
Even very uneven steps should move motor, so issue could be something else.
Are you sure motor which you are using rated for your current driver?

mandreas · 2016-04-28 07:58:56

Thanks Shahin,

the Chinese manufacturer had provided me with this data :

Red A+
Blue A-
Green B+
Black B-
24V 1.5A

mandreas · 2016-04-28 21:38:44

I discovered the problem:

I had purchased the drv8825 with no welded pin, obviously my welding was done wrong,
I did it again and now it works!!

mandreas · 2016-04-28 22:46:02

happens one thing I do not understand:

at the beginning of the print , the stepper "Moving Down 312,669 pulses 195.41812 mm" ???, I'm forced to shut down.
I would that it begins to print, the exact position where I place the plate!

Shahin · 2016-04-29 00:19:43

Do you have endstop on top?
Have you calibrated yet?
Have you set axis direction as bottom zero?

mandreas · 2016-04-29 08:33:39

Thanks Shahin,

forgive my 5 minute panic, you have centered as always the problem, !!!

Cya Andrea

mandreas · 2016-04-30 12:11:55

I conduct the tests for setting, being my a "top down" was easier than I thought, and everything works perfectly .

Sometime happens that the sled, while hitting the end stop, ignores it and keeps advancing, this scares me because I do not understand when it can happen...

mandreas · 2016-04-30 13:42:17

P.S

correct me,

at the end of each print, the slide runs to the end stop position, but it continues its course ..

mandreas · 2016-04-30 15:19:08

I read in detail, that the plate , "Moving to stop position", how do I program this value?
I wish that in the end print the plate remain stationary,

Thanks

Last edited by mandreas (2016-04-30 15:20:26)

Shahin · 2016-04-30 15:44:20

Mandreas,

Is your endstop at top? And axis is zero at bottom?

mandreas · 2016-04-30 16:20:53

Then, I put at the bottom the end stop,
when i turn on,it proceeds with "calibrated zero position " it runs down, touches the switch and stops ,all right ,
the problem occurs when it has finished printing, it runs to the zero position, but unfortunately does not stop, even when it has reached the switch....

Shahin · 2016-04-30 16:33:25

give me sometime to tweak our codes. Direct mode only tested and supports limit at top/ zero at bottom.

mandreas · 2016-04-30 17:00:17

Thanks Shahin,

it's very kind of you

mandreas · 2016-04-30 17:08:20

P.s, : End stop position...

Shahin · 2016-05-01 05:18:17

Install beta version.
Put -1 as stop position on setup page. Let me know if it solve the issue.

mandreas · 2016-05-01 08:18:15

Hi Shahin,

I updated the nano version (1149) , but I see no one change, pardon my ignorance, but where I got the beta version,

thanks Andrea

Shahin · 2016-05-01 19:22:49

Have you put -1 in stop position field? it should prevent movement after print completion.

mandreas · 2016-05-01 20:00:31

sorry,I do not understand where the stop position field is , this is the parameters table of my version...

Shahin · 2016-05-01 20:18:02

http://nanodlp.com:8080/setup
"Platform / Resin" section
"Platform Wait Position" input

mandreas · 2016-05-01 20:34:27

yes, ok,

I did a test, but unfortunately nothing has changed ....

Shahin · 2016-05-02 04:44:58

Do you still see "Moving to Stop Position" message in log section after job completion?

mandreas · 2016-05-02 12:11:09

Hi Shahin,

i re-run the test, and yes it still apare "miving to stop position", I noted also that during the movement of the slide along position to stop, I pressed the switch end stop, but the slide continued its run as if unaware of the priority control limit! From my point of view concerning the "top down" printers, would welcome an option that prevents any kind of movement at the end of any print ,

cya Andrea

mandreas · 2016-05-02 15:17:20

P.s. :

for example, to submit a "disable motor" command at the end of the print...

Shahin · 2016-05-02 19:28:46

Please, attach debug file. Setup page/Tools tab/Debug button

nanoDLP

#1 2016-04-27 17:51:49

final stage

#2 2016-04-27 21:07:56

Re: final stage

#3 2016-04-28 07:58:56

Re: final stage

#4 2016-04-28 21:38:44

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