Speed test to compare with Carbon3D

[taskman]

So I did a speed test on my beta machine

Here is the result
https://plus.google.com/116019898771...ts/f1L55WriTvy
https://www.youtube.com/watch?v=PoAqoc4sLTY

[richardphat]

I also believe that if you can concentrate the projected surface on a small surface you would get better speed. It seems that they used a credit card size platform. The light intensity would be far more greater which explain the curing speed process.

This video has been online since 2011.... the guy obviously used low end component compared to Carbon3D. If he did a video record and timelapse then it explained that it's possible with low end equipment. However, if it was picture, I can't tell. I am no expert when it comes to footage.

[taskman]

I will update the software this week so that I can combine standard printing with continues. When a big flat surface is printed it will use the normal dipping method and when it prints thin walls it will go over to continues. For now the user will need to set what should happen. If the user sets the dip depth to 0 it will activate continues or maybe I will just add that as an override in my override manager to enable continues and then the user can select which layer to disable continues again. This will be great when printing a box. The front can be printed using dipping and then the walls using continues

[richardphat]

I'd like to add from a SLA user perspective, that it takes few milliseconds for the laser to cure one layer section. Considering the fact that the surface power is so great, that could explain how carbon 3D is able to cure that fast.

[taskman]

I think printing big parts or big areas SLA (laser printing) will always be slower than DLP, because DLP displays the complete layer at a time. Looking at the documentation it seems Carbon 3D uses DLP so they are using a projector.

I am talking to Acer now to get the new HD projectors that will arrive in Australia next month. They have 500 more lumen so I will be able to create things even faster

[richardphat]

I mean the resin spot that get flashed by the laser is cured instantly, since the power/surface is stronger than the one provided by DLP.

Hence, carbon 3D main speed is due to the fact it concentrate its beam into a much smaller surface.

[nicanor76]

The reason why Carbon 3d is faster than other SLA printer is it skips the peeling stage. Currently all bottom-um SLA resin cures into the bottom of the resin container, the machine needs to peel it off (roughly 5 steps up) then goes back down (4 steps down) to cure the next layer. Carbon 3d continuously moves upwards (1 step up) before it cures the next layer.

[berger316]

I have a couple of questions.
What is the wavelength of the light used to cure the resin?
Will it be open platform to run any resin you want?

[taskman]

If you buy the HD projector it will either be the H6510BD or the H6520BD. If you buy the non HD projector it will be the X1173. The resin used is Fun To Do and it hardens in the 400 nm range like most other resins. You are able to use any resin. Actually there is a material directory in Gizmetor where you can have unlimited number of material configs. When I have more time I will upgrade Gizmetor so that it is easier to change the config, then no need to change the XML file

Here is an example where I tested continuous printing in my" "FunToDo IB Red directory

<profile name="Continuous print">
<bottom-layer-exposure-multiplier>1000</bottom-layer-exposure-multiplier>
<bottom-layer-count>1</bottom-layer-count>
<min-layer-height>10</min-layer-height>
<max-layer-height>100</max-layer-height>
<build-plate-move-before-print-microns>0</build-plate-move-before-print-microns>
<pause-after-prelift-file-ms>5</pause-after-prelift-file-ms>
<pause-after-print-file-ms>5</pause-after-print-file-ms>
<pause-after-hide-layer-ms>5</pause-after-hide-layer-ms>
<pause-after-postlift-file-ms>5</pause-after-postlift-file-ms>
<pause-after-build-plate-move-ms>5</pause-after-build-plate-move-ms>
<pause-after-layer-ms>5</pause-after-layer-ms>
<min-z>
<min-layer-time-ms>1</min-layer-time-ms>
<max-layer-time-ms>1</max-layer-time-ms>
</min-z>
<max-z>
<min-layer-time-ms>1</min-layer-time-ms>
<max-layer-time-ms>1</max-layer-time-ms>
</max-z>
<compensate-for-hotspot>false</compensate-for-hotspot>
</profile>

[berger316]

So would it cure resin that is used in a SLA machine that is curable at the 365 nm wavelength.
Also to you have any literature and pricing on your machines.

Thanks

If you buy the HD projector it will either be the H6510BD or the H6520BD. If you buy the non HD projector it will be the X1173. The resin used is Fun To Do and it hardens in the 400 nm range like most other resins. You are able to use any resin. Actually there is a material directory in Gizmetor where you can have unlimited number of material configs. When I have more time I will upgrade Gizmetor so that it is easier to change the config, then no need to change the XML file

Here is an example where I tested continuous printing in my" "FunToDo IB Red directory

<profile name="Continuous print">
<bottom-layer-exposure-multiplier>1000</bottom-layer-exposure-multiplier>
<bottom-layer-count>1</bottom-layer-count>
<min-layer-height>10</min-layer-height>
<max-layer-height>100</max-layer-height>
<build-plate-move-before-print-microns>0</build-plate-move-before-print-microns>
<pause-after-prelift-file-ms>5</pause-after-prelift-file-ms>
<pause-after-print-file-ms>5</pause-after-print-file-ms>
<pause-after-hide-layer-ms>5</pause-after-hide-layer-ms>
<pause-after-postlift-file-ms>5</pause-after-postlift-file-ms>
<pause-after-build-plate-move-ms>5</pause-after-build-plate-move-ms>
<pause-after-layer-ms>5</pause-after-layer-ms>
<min-z>
<min-layer-time-ms>1</min-layer-time-ms>
<max-layer-time-ms>1</max-layer-time-ms>
</min-z>
<max-z>
<min-layer-time-ms>1</min-layer-time-ms>
<max-layer-time-ms>1</max-layer-time-ms>
</max-z>
<compensate-for-hotspot>false</compensate-for-hotspot>
</profile>