Resin question
Posted: Sat Mar 06, 2021 6:51 pm
I think I have problem and I think I know the answer, but I'm interested any comments/ideas anyone may have?
I used my resin printer yesterday and today, for the first time for a couple of months, and I keep having the same problem which I hadn't seen before.
As I poured the resin into the vat I had a passing thought that it looked a bit thick, but didn't pay it much attention. However, I've tried to re-print something which printed perfectly before and keep getting two problems:
a) The fine detail is rounded/blurred where it was really crisp originally.
b) I'm printing number plates on supports and I keep finding that the raft and supports print perfectly and the plate itself starts to print but by the time it finishes the part printed number plate is laying in the bottom of the vat and the raft and supports are stuck to the build plate where they should be.
I think the reason for both is the viscosity of the resin, in that it doesn't run off each layer properly and so the next UV shot fuses some more resin onto the edges of the previous layer. This in turn of course slightly increases the weight and then the viscosity plus weight causes the whole thing to break free of the support attachment points.
So I come back to resin storage. I have made sure to filter the unused resin as I pour it back into the original opaque bottle which is in turn stored out of direct light. However, it looks to me as though it is slowly curing in storage. Does anyone have any thoughts on this?
Is pouring the resin back into the bottle contaminating the unused resin and causing the whole lot to degrade?
Would it be better to actually throw away the unused resin in the vat, or at least keep it in a separate bottle?
If so will it protect the 'new' resin in the original bottle or will that degrade anyway once opened?
Thoughts?
I used my resin printer yesterday and today, for the first time for a couple of months, and I keep having the same problem which I hadn't seen before.
As I poured the resin into the vat I had a passing thought that it looked a bit thick, but didn't pay it much attention. However, I've tried to re-print something which printed perfectly before and keep getting two problems:
a) The fine detail is rounded/blurred where it was really crisp originally.
b) I'm printing number plates on supports and I keep finding that the raft and supports print perfectly and the plate itself starts to print but by the time it finishes the part printed number plate is laying in the bottom of the vat and the raft and supports are stuck to the build plate where they should be.
I think the reason for both is the viscosity of the resin, in that it doesn't run off each layer properly and so the next UV shot fuses some more resin onto the edges of the previous layer. This in turn of course slightly increases the weight and then the viscosity plus weight causes the whole thing to break free of the support attachment points.
So I come back to resin storage. I have made sure to filter the unused resin as I pour it back into the original opaque bottle which is in turn stored out of direct light. However, it looks to me as though it is slowly curing in storage. Does anyone have any thoughts on this?
Is pouring the resin back into the bottle contaminating the unused resin and causing the whole lot to degrade?
Would it be better to actually throw away the unused resin in the vat, or at least keep it in a separate bottle?
If so will it protect the 'new' resin in the original bottle or will that degrade anyway once opened?
Thoughts?