Printing with Makerjuice G+ unpigmented resin
Posted: Sun Nov 06, 2016 6:36 am
Hello everybody.
I am new at SLA, so bear with me.
I have recently started to print with SLA using Makerjuice G+ resin, but that resin is transparent, non-pigmented. I have enclosed picture of my failure. I bought non-pigmented resin since I though it would be nice to have non-colored one, since it looked quite universal, but I honestly think that I was completely wrong.
Hardware: ACER 6510BD beamer.
I am using tensioned FEP film as vat bottom. XY resolution is ~100microns as well.
My questions are:
1. Is non-pigmented resin usable at all? As far as I understand now, light is able to go through the part completely, when it is transparent, and it can burn way more resin than it should, whereas when resin is pigmented, it is not transparent, so light will only burn visible region, avoiding deeper sections. However, when I did my research, I found that generally photopolymers, when exposed to light, will polymerize just a very thin layer of photopolymer. So I do not get that then...
2. As you can see, the part is pretty overexposed as I understand. I tried to use various exposure times like 4s, 8s, 10s, layer was usually 100 microns (XY - 100microns as well), but if I use shorter exposure times, those thin supports completely fail and the whole part becomes just a pile of small, detached particles in the vat/resin, which is quite difficult to filter and clean (and those particles like to damage teflon film), but if I use longer exposure times, you can see the result - it is pretty overexposed. Any solutions? Is it because resin is without pigment?
Thanks a lot.
I am new at SLA, so bear with me.
I have recently started to print with SLA using Makerjuice G+ resin, but that resin is transparent, non-pigmented. I have enclosed picture of my failure. I bought non-pigmented resin since I though it would be nice to have non-colored one, since it looked quite universal, but I honestly think that I was completely wrong.
Hardware: ACER 6510BD beamer.
I am using tensioned FEP film as vat bottom. XY resolution is ~100microns as well.
My questions are:
1. Is non-pigmented resin usable at all? As far as I understand now, light is able to go through the part completely, when it is transparent, and it can burn way more resin than it should, whereas when resin is pigmented, it is not transparent, so light will only burn visible region, avoiding deeper sections. However, when I did my research, I found that generally photopolymers, when exposed to light, will polymerize just a very thin layer of photopolymer. So I do not get that then...
2. As you can see, the part is pretty overexposed as I understand. I tried to use various exposure times like 4s, 8s, 10s, layer was usually 100 microns (XY - 100microns as well), but if I use shorter exposure times, those thin supports completely fail and the whole part becomes just a pile of small, detached particles in the vat/resin, which is quite difficult to filter and clean (and those particles like to damage teflon film), but if I use longer exposure times, you can see the result - it is pretty overexposed. Any solutions? Is it because resin is without pigment?
Thanks a lot.