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If it truly was surface tension on the print layer, one would need to explain why a straight column prints so well.

It has to be something, especially if it is evenly distributed along the print....

No worries about not answering the questions. Naturally I assumed that your team is trying to make the best possible prints and would be pursuing that goal if you could.

The question was more to...

It is unfortunate you could not go with the PCB coil method I suggested, it would make for much more secure interconnections (and more consistent coil inductances).

As for the remaining issues, I...

directed to Rylan: is there an optimal setup for operation? Basically the system parameters that you recommend? (build size/height above tank)

Any new prints from the beta team? Or updates in general?


- UD

I have some circuit questions:

Is your Vcc being loaded down from the laser transitions of on/off? Maybe it is pulling too much power at those instants which then lowers the available energy to...

Im truely glad to be of help!

I just saw your ted talk and I am thrilled that so many people on this forum, as well as beta testers are helping to propel this project to its amazing potential.
...

sorry for the late reply, off topic: I just replaced my windows XP with LUBUNTU, it is a crazy learning curve but totally worth it!

When I suggested this I was doing a quick search on digikey:
...

Those updated prints came out wonderful, and this is already well within 90% of usability!

My biggest question now from the latest update is this:

The layers seem to be small, but I can still...

Amazing update!!

These are just ideas of neat things to get people's attention (that require symmetry but maybe not accuracy since I remember accuracy as being something that needed work on)
...

Has the print holes problem been solved yet? From the update it sounded as though it was a software/programming bug, but there havent been any updates since.

One thing to try would be to run the...

sometimes steppers could vibrate a bit from their holding torque, check the motor and its mounts maybe?

or it could just be that the mounting of the laser and printer assembly is not rigid enough?...

Nice print Jstrack2!

You seem to be the only one printing anything these days! Has there been a slowdown of beta development?

I have some questions:

Are you intentionally making those layers...

How goes the progress on the PCB coils?

I just stumbled upon this:

http://www.digikey.ca/product-detail/en/MP0760-100/240-2265-ND/703454

Digi-Key Part Number: 240-2265-ND

It`s a 20mm...

Easy fix for this:

Make some kind of foil holder mechanism that will attach onto the laser diode module. Inside this foil holder will be three discs of aluminum foil (basically like your...

This all sounds very promising!

Would this also make the resulting prints have smoother finishes? I notices some wavyness in many of the prints that other SLA printers dont have (maybe it is...

Well, you can always use a 16 layer PCB, but then it starts becoming inaccessible! Realistically, two 4 layers stacked on top of eachother to make the 8 would be good. Or likewise you can stack two...

It can be done by layering those very thin PCBs, insulating them and then lining them up to solder. The process would be way more tedious than simply winding your own home brew coils and connecting...

I know it is a bit late to make suggestions, but here is an idea for you guys:

In my work, I have done a bit of research on PCB trace inductors. From your description it seems like you have a coil...

Jstrack, I dont really understand what kind of waves you are talking about, your video shows light waves.

One more thing has come to mind about these holes, and that is the peachy printer...

Hey guys,

I've been following the thread and thinking about possible solutions.

So far I think you are all on the right track, and that something needs to break that pesky surface tension....

Sorry for the double post!

I had a second look at the sensor I linked, and it was not the right type of sensor! The one above is a simple on/off sensor design to replace reed switches in low power...

Adding a closed loop would make the system more reliable and reproducible, along with providing a memoryless dampening of the mirrors (something they claimed to have problems with). The resin bath...

Megneto resistive sensor:

http://www.digikey.ca/product-highlights/en/Magnetoresistive-Sensor-ICs-Nanopower-Series/52414


Taken from Wikipedia:

The AMR effect is used in a wide array of...

That sounds awesome Pete!

As for the hysteresis/memory issues, maybe it can be tuned for in software? Hysteresis usually is predictable, so I'm thinking it would just need to calculate an...