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Step 8: Laser Driver Board

There is most likely a better way to do this but I am not an Electrical Engineer, the parts I used were on hand. This setup has worked fine for me for hours of printing so far. 

The drawings below are a little different than what I have wired but should work. You could also put this all on one board, this was the biggest board I had on hand.

The Laser driver board takes 9V from a wall wart power supply to drive the relay and the LD33V 3.3V Voltage Regulator that powers the laser. The TIP120 transistor switches the relay which switches the ground of the laser to turn it on or off.


Venus de Milo
<p>how much does this project cost in total?</p>
<p>Great Job Rob!</p><p>You said that galvos are expensives and you are right. I just would like to know if you have some idea about how much faster they cold be.</p><p>I don't read the complete tutorial but I saw the video and I can imagine that your printer is as fast as a Prusa or any other ABS extruder printer. Do Iam right?</p><p>Thanks for sharing!</p>
What kind of iris you used.thanks
Hey I have the printr bot simple would that work with a few mods and if so what mods would I need???<br>
<p>Laser on x-y axis</p><p>Vat plate on z axis</p><p>This would be hard, but definitely possible. Good luck!</p><p>-Max</p>
<p>Hi,</p><p>Someone was ispired by your project: http://www.lumipocket.com/</p>
<p><a href="https://peachyprinterks.backerkit.com/hosted_preorders" rel="nofollow">https://peachyprinterks.backerkit.com/hosted_preor...</a></p><p>Whether it may be something like this? This project printer that collect money it will cost only $ 100. Pretty impressive</p>
<p>Can not laser engraving to become this type of printer? I watched that engraving is for 80-90 dollars.</p>
<p>Hi All</p><p>I am working on a 3D printer using the Galvo principal</p><p>I picked up a laser light show box from </p><p>http://www.djcity.com.au/eclipse-term300r-1</p><p>They had them on special for AUD$80.00</p><p>The good thing is the mirrors are mounted on steppers and the blue laser has a focus adjustment. </p><p>I plan on the driving the steppers with an </p><p>Arduino Mega http://www.ebay.com.au/itm/161716154784</p><p>CNC Drive Shield http://www.ebay.com.au/itm/400737553267</p><p>1/32 Micro Stepping drivers http://www.ebay.com.au/itm/271884287667</p><p>And solid state relay http://www.ebay.com.au/itm/261861701056 (to drive the laser)</p><p>I found a linear guide and ball screw at work (Lucky me)</p><p>And I needed a stepper for the Z axis http://www.ebay.com.au/itm/201006654389</p><p>I have most of the main parts now, all I need is time to assemble and test</p>
<p>What prevents the beam from traveling under the surface to cure unintended dross? Is there a focal point? Does the resin have some absorption factor that prevents scatter?</p>
<p>hi im very new to this and was wondering if someone could tell me how to program the basic movements of a 3d printer and how you program the stepper motors and everything is it just g code ?</p>
<p>hi im very new to this and was wondering if someone could tell me how to program the basic movements of a 3d printer and how you program the stepper motors and everything is it just g code ?</p>
<p>Game changer in lowering the barrier to entry. What you&rsquo;re seeing <br> in the video isn&rsquo;t much more than a proof of concept, there&rsquo;s obviously <br> still work left to be done.</p><p>As for strength of parts, I don&rsquo;t see any reason to think they&rsquo;d be <br>weaker than low-end FDM printed parts which are notorious for splitting <br>between layers.</p>
<p>must to download pdf file to make a 3d printer sla?</p><p>or this structure is enough?</p>
<p>hi can i use this printer for making jewelry models?</p>
<p>I had the same thought exactly about other extruder based 3D printers. So nice to see you have done so much good work with this =)<br>And I don't know too much about this, but do you know of any way to improve accuracy?</p><p>Like a better lense etc.</p>
Ok great I got my firmware to work. Ij ust started over. I have one question. I have my Skeinforge profile set up and the machine set up in ReplicatorG. When I hit run I am getting errors saying that the g_Code is telling each axis to run faste rthan it is allowed to run...where would I tweak that? Thanks
<p>you have to double check if the acceleration is enabled. This error message is for makerbots I believe...as long as your motors are enabled to accelerate and able to pull the tourque you should be ok.</p>
<p>Hey, great project! I got one up and running based on your software. I still have one issue with the M113 code. This in reprap is for the power management...I was wondering if you used this command to reduce the power on your laser or of you eliminated it from the code with the replace files. If you did eliminate it, how is that accomplished? Did you use a replace and truncate command?</p>
<p>Hi there,</p><p>Nice work. I am interesting in laser module. Please tell me what is laser module name?</p><p>Sincerely, </p><p>Tahi</p>
<p>Very cool!</p>
<p>Hi RobHopeless, I have read with attention your projects and it is very interesting. I should know if with the laser system the final resolution of the object is the same of a DLP system I ask it because I am interested to built a 3D printer top/down but I don't know betwen the two system is the better. Regards Claudio.</p>
This is effin' amazing! Great work!
<p>Mostly what I have done so far is adjust the laser and iris then print a sample and measure it and either adjust the laser or the settings to fit.</p>
<p>Thanks, I'll have to look into that too.</p>
hi <br>great piece of work, is the Iris a must or will it work without. <br>Clive
I am planning to create a 3doodler type handheld device that uses resin instead of filament, and I was wondering if this type of resin can cure fast enough to support itself if it has a laser focused on the stream coming out of the nozzle?
Breathtaking

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Bio: I am Andy Rawson and I make things. I usually end up making things that are expensive to otherwise obtain. Like a Stereolithography 3D Printer ... More »
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