Ytec3D Forum

Tried adding 96oz of maltodextrin to the mix.

I got much finer details, but the maltodextrin needs a much higher saturation that I was running - resulting parts were very 'dusty' and crumbled easily.

I'll continue to refine the process...

Some thoughts: Do you have an HP45 printer where you could 'vampire' a scope into the control signals for the head? HP thermal jetting timing is super picky - and it's ridiculously easy to blow out an inkhead by holding it in 'heater' stage for too long (lesson learned when I forgot to remove my HP ...

Exactly - the FIFO is there to 'relax' the micro's IO servicing timing requirements.

Otherwise, the micro is at the mercy of the dot clock of the printhead - something I learned painfully with BrundleFab.

Ok, CA may be a fail.

Only penetrated about 1mm into the object, and pretty much fell apart after immersion.

If I had a vacuum pot, I'd try epoxy.

With the FIFO, you just have to consider bursts. For example, assume you have the following: 1) A Cortex3 ARM micro with a 50Mhz SPI (32-bit wide buffer) bus 2) A serial to parallel demux 3) A FIFO chip with EMPTY, FULL, and HALF_EMPTY signals There are two buffers pointers in the ARM: * NEXT_TO_PRI...

It worked pretty well with the short (~5kg) ZP-150 test I gave it. I'm going to wait till next Wednesday to pop the bag open for the sugar powder test of the vortex. The majority (95%) of the powder went into the bucket, and there seemed to be no appreciable difference between the texture of the dus...

I've just started a long-term trial with it with my sugar powder - I'll be able to get a good feel for the separation characteristics in a week or so.

I don't see why you couldn't do the same with CA or epoxy, since the sugar is a fully bonded matrix throughout after it's fully cured, and will be able to be fully removed after infiltration.

I'll have to try that with a small sample object.

Basically, you need something like this: http://www.ti.com/lit/ds/symlink/sn74act7806.pdf An asyncronous uni-directional FIFO memory (they come in larger sizes than 256x18, this is just an example). You tie the 'write data/write clock' side to the microcontroller, the 'read data' side to the printhe...

So, I found a novel new meta material. I was impregnating some of my sugar powder models with wax, and wanted to test the water resistance of the final result. So I left some small pieces to sink to the bottom of a glass of water, and forgot about them. Two days later, the pieces were floating. Odd,...