Brittle support plates


#1

Lately, it seems like the base-plates my Gray prints are very brittle, even a light pry from the removal tool just shatters the base instead of lifting it up. Is there something I can do to make my parts pop-off again? (ie sand the base? thicken the base itself?)


#2

I’m having the same issue and I use ALW resin. Sometimes they just shatter.


#3

++++1 Thought it was just me


#4

Having this issue too. It seems it’s over-curing and sticking to the build-plate like it’s welded on. Doesn’t happen every time though, its a bit random.


#5

I look towards Preform as it adjusts the power of the laser. Could be hitting it too hard just during the build of the support plate. That happened in the past and the support plates were all but welded to the build plate. I had to use a hammer and chisel to get them off.


#6

I believe many people are adjusting the z-offset so that the raft is sell compressed to the build platform. this may be the route you need to go down. there’s plenty of threads on here take a look.


#7

The raft is stuck to the build plate, that’s not the issue. Only one row or so breaks off after layer 2 or 3. The first layers are there so the Z axis isn’t the issue I feel. FL didn’t think it was either. They feel I need to clean the glass and the main mirror.


#8

Yeah I feel like my gray builds went to hell after one of the more recent firmware updates. My builds using tough resin are perfectly fine, its just gray that seems to have this disintegrating raft issue.

What do you guys have for your “base thickness” setting right now? Mine is at 2mm, which I think is default… perhaps thickening it to 3mm or 4mm would help?


#9

Contacted ALW on this and they assured me that my current resin is the same and from the same batch. So it’s not the resin that’s the issue. The firmware and Preform have not changed in the last month so it’s not that either. Only leaves a dirty mirror and underside of the glass. I’ll attach that next week maybe when I have some time.

I run with everything set on what the machines came with. I don’t mess with these settings as for the most part both machines run well.


#10

Ditto with coloured resin. This resin is incredibly brittle at best, but now it’s really hard work to remove from the build plate without breaking the part,


#11

Exposure settings should go with PreForm version, not firmware version. What PreForm version, grey-resin version, and layer thickness are you printing?


#12

Hi Ben
Cant speak for the others but Im running the latest Preform [2.18.0]

All settings default as far as I know,
This is what I see

Grey: FLGPGR04 *UNDERSIDE STICKER: 20180517
base thickness 2mm
layer thickness 100 µm


#13

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#14