Raspberry PI Based DLP Printer

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shahin
Posts: 45
Joined: Fri Nov 21, 2014 4:55 pm

Re: Raspberry PI Based DLP Printer

Postby shahin » Mon Oct 12, 2015 1:26 pm

Ray1976 wrote:Hello Shanin,

I've build an DLP Top Down Printer powered by an Raspberry Pi and the Adafruit Stepper HAT driver.
This driver runs over I2C using a PWM driver chip.

Via the Adafruit site I've added the python and git library and installed Python. The test functions from the site works very well.
But.. When I install NanoDLP and choose the I2C pins it doesn't work.

Can you advise me on what to do to solve this problem?

The beamer function via HDMI works fine.

Thanks !


Hi Ray,

You need stepper driver such as drv8825 or A4988, nanoDLP currently does not support sending G codes, It directly sends pulses.

pratipo
Posts: 2
Joined: Tue Oct 06, 2015 7:59 am

Re: Raspberry PI Based DLP Printer

Postby pratipo » Mon Nov 09, 2015 2:44 pm

hi sahin

just saw the last built
the servo is working perfectly! so great! many thanks

this is just to let you know the resistor needed for the carriage endstop is a PULLUP rather than a pulldown ;)

also, how are you dealing with the start-up "noise" in the stepper?

thanks!
R

shahin
Posts: 45
Joined: Fri Nov 21, 2014 4:55 pm

Re: Raspberry PI Based DLP Printer

Postby shahin » Mon Nov 09, 2015 4:18 pm

pratipo wrote:hi sahin

just saw the last built
the servo is working perfectly! so great! many thanks

this is just to let you know the resistor needed for the carriage endstop is a PULLUP rather than a pulldown ;)

also, how are you dealing with the start-up "noise" in the stepper?

thanks!
R


Hi,

Thank you for the tip.

There is an uneven step issue which specially prominent on high speed movements. It caused by non-realtime OS and programs GC. It will be really hard to improve it. But I have not seen any issue on motor startup, could you post a video regarding the problem?

Adam from this forum helping me to add arduino support to the program. It will help you if you need perfect movements.

Best regards,
Shahin

adambx
Posts: 119
Joined: Wed Apr 09, 2014 6:33 am

Re: Raspberry PI Based DLP Printer

Postby adambx » Wed Nov 11, 2015 4:04 pm

As shahin pointed out, we're currently testing GCODE implementation to make the SW work with any GCODE controller connected to a raspi USB port.

Cheers

Haydn
Posts: 1
Joined: Sun Aug 02, 2015 5:51 pm

Re: Raspberry PI Based DLP Printer

Postby Haydn » Tue Dec 22, 2015 10:13 pm

Hi Sahin,

I'm working on developing a RPi/Arduino/GRBL based DLP printer and your software sounds interesting.
I'm also an experienced Linux programmer and would be willing to help with coding, etc.

How could I arrange to try out your software, to see if I can get it to work on my DLP?

shahin
Posts: 45
Joined: Fri Nov 21, 2014 4:55 pm

Re: Raspberry PI Based DLP Printer

Postby shahin » Wed Dec 23, 2015 1:22 am

Haydn wrote:Hi Sahin,

I'm working on developing a RPi/Arduino/GRBL based DLP printer and your software sounds interesting.
I'm also an experienced Linux programmer and would be willing to help with coding, etc.

How could I arrange to try out your software, to see if I can get it to work on my DLP?


Haydn,

http://www.nanodlp.com

danielm
Posts: 41
Joined: Tue Jul 08, 2014 7:39 am

Re: Raspberry PI Based DLP Printer

Postby danielm » Thu Jan 21, 2016 6:36 am

Hi,

I am working on similar solution with Web-based UI, however it is designated for laser-based 3D printers. Check http://marsaltech.com/update-october-2015/ for screenshot. Initial prototype makes use of RPi, however I am currently developing new iteration with Cortex M4 MCU.

In this video you can see scanning of infill first, then perimeters. Output data of my custom slicer is stored in vector format, not as bitmaps. Therefore it will be possible to adapt scanpaths to different materials.
https://www.youtube.com/watch?v=3eMjF2e6bt0

Daniel