Messages

Hi all,

I am done with the python code to loop the process, now the code prints the png files that I feed on a continuous loop and now I am looking to improve the code and if possible a GUI.

Thanks

Hi Jeff,

I was busy with other things and started working on this project three days back. Now, it's fine and works like how I wanted.  Thanks.

Now I am wondering to write some python script to loop the process.

Hi Macpod,

I made a rookie error and once I changed the wiring with molex connectors and re-wired it, it works pretty fine. The circle is perfect.

With this thing done I am having issues with the png files. Can you please help me and give specifics on the png file piping methods.

Thanks.

[The Circle is continuous when connected to B channel]

1. I was overdriving the galvos I guess because the new galvo setup doesn't make any noise while piping circlemaker with stdin, the old one made a lot of noise and had a tough time reflecting the laser (literally nothing was projected on the screen laser was scattering all over)

2. Yes, I am using the pre-compiled code. One more thing I noticed is that:
--- The Circle is continuous when connected to B channel

--- The circle is broken into 3 segments and not continuous when connected to C channel

3. Yes, the code is perfect and should work just as fine. Let me measure the voltage and diagnose it.

Thank you :)

[circle can be seen when I connect to B channel and its OFF before and after running it but not with C channel always ON before and after]

Hi Macpod,

1. I changed my galvo setup 30kpps, this one has trimmed mirrors and when I piped the circlemaker to stdin I got a circle finally! I think the problem was with the galvo setup and the result is circle can be seen when I connect to B channel and its OFF before and after running it

but not with C channel always ON before and after. Circle is solved! :)

2. But when I pipe displayimage.exe to stdin.exe only C channel works but the laser is always ON before and after printing. Laser is ON even when I disconnect the C channel with TTL of the Laser module and I feel like no matter what .png file I pipe the laser just sweeps through I get a same trend for all image. How to print a png file are there any specifics?? and can you please provide some little details reagrding the png piping. My purpose is SLA 3D printing. Thank you you're previous post helped me a lot thanks

[galvo drivers that takes 15V as input]

I have soldered the headers and the wiring is also correct, but I have a concern in my power supply I am using  galvo drivers that takes 15V as input and the laser driver takes 12V input. So is anything wrong with the power supply I am using?

Attaching pictures

Picture 1: Lasershark connection with soldered headers
Picture 2: Galvo drivers (+/- 15V)
Picture 3: 12V laserdriver (+/- 12V)
Picture 4: Power supply units


1. Also when I pipe circlemaker to stdin the mirrors are moving too fast and no image is being projected (Maybe I am overdriving the mirrors like you said. I am looking to replace the galvo setup to 20kpps)

2. Even though I am running the galvos at 20kpps for png file I see no vigorous movement of mirrors(but no movement in Y mirror )and the laser is always ON before operation and even after operation.

I am a newbie to this area and field with no prior knowledge please bear with me and enlighten me.

[abnormal movement of the galvos]

Hi,

I tried a test run today and faced some difficulties as follows:

1.  I tried to test the setup by piping the Lasershark_stdin_circlemaker.exe to Laseshark_stdin.exe but I get an abnormal movement of the galvos and after a couple of minutes the galvos are starting to heat up.

2.  Also, in the Lasershark_stdin_input_example.txt file, it's given the format of the input is

S=X,Y,A,B,C,INTL_A here the TTL controls are last two parameters but when I try to run input the png file and run the lasershark_stdin_displayimage.exe I get the X,Y,0,0,0,1 the last 3 parameters are same no matter what. Can you me some insight on how to achieve TTL control? the laser is always on and the laser being projected is different.

3. No control for C parameter, when I write the flag -c it says illegal parameter.

I am attaching photos for your reference, thank you

After digging around I found the issue and now its fine and I got the file working.

I have been trying to run lasershark_stdin_displayimage.c and to pipe the output to lasershark_stdin.c but I keep getting some errors. Can you please provide some guidelines on how to pipe lasershark_stdin_displayimage.exe with lasershark_stdin.exe

I am attaching the images for your reference

Sorry for the late reply I was on a vacation. I am trying to use the .png method specified by Macpod. I halted my work for the vacation, have to get started on it from tomorrow. I will keep you posted.

Thanks

That's great! Thanks for getting back. Yes, I can find the connectors in the blue painter tape. Thank you.

[The Components I purchased are:1. LaserShark DAC board2. Laser Galvo 20kpps3. Laser Module with Driver I am not worried about the Z-axis motion of the bed. I am looking to generate the layers as of now as my first priority. If any other components are required to make this work, please provide me with some insights.]

Hi Guys,

I am new to SLA technology. I am quite comfortable with FDM and Gantry type 3D printers, but when it comes to Laser Galvo SLA I am finding it a bit difficult.

I recently purchased the LaserShark board from Jeff and I am ready to start my project on SLA 3D printer.

The Components I purchased are:
1. LaserShark DAC board
2. Laser Galvo 20kpps
3. Laser Module with Driver

I am not worried about the Z-axis motion of the bed. I am looking to generate the layers as of now as my first priority. If any other components are required to make this work, please provide me with some insights.

I am attaching the pictures below for your reference and this is just a temporary wiring to depict my understanding once I know its correct I will proceed with the further steps with proper fixing of wires and jacks.

Thanks