Re: Print waviness or wrinkling
Posted: Thu May 12, 2016 6:53 pm
Ah, that sounds different from what I'm experiencing. Shoot. I don't think I have the setup or print settings for my LittleRP right, so prints aren't quite as I'd like them to be, but at this point I don't know what needs adjusting. I'm using a flexvat from HLocke (projectsinterestsandetcetera.com), and while the FEP sheet has a couple of divots in it, they don't generally show up in the prints. The sheet is slightly old and fogged/scratched.
Here are a couple of photos of recent prints in B9 Emerald.
The first shows the waviness I was mainly referring to. The scale at left is in millimeters, so there are 4-5 waves per millimeter of height. (It's tough to say exactly, since the scale isn't exactly adjacent to the print or perfectly vertical.) Thing is, I'm printing at 40 um layers, so those aren't individual layers; each wave is five or six layers. If they weren't present the print would be much smoother, so I'd really like to eliminate them! I saw a similar features on prints from my FDM printer; there they were caused by a wobbly z axis and the pitch of the waves matched the pitch of the z-axis screw. Here, I don't think there's anything mechanical that has a pitch of 200-250 um. I'm using 40 um layers because that matches the distance travelled by a full step of the z-axis stepper motor.
The second photo shows two jumps, one about 2/3 of the way up the print and the other about 4/5 of the way up. They tend to occur when the area of the layers is growing quickly, but can happen randomly too.
If you have any suggestions or theories I'd love to hear them!
Here are a couple of photos of recent prints in B9 Emerald.
The first shows the waviness I was mainly referring to. The scale at left is in millimeters, so there are 4-5 waves per millimeter of height. (It's tough to say exactly, since the scale isn't exactly adjacent to the print or perfectly vertical.) Thing is, I'm printing at 40 um layers, so those aren't individual layers; each wave is five or six layers. If they weren't present the print would be much smoother, so I'd really like to eliminate them! I saw a similar features on prints from my FDM printer; there they were caused by a wobbly z axis and the pitch of the waves matched the pitch of the z-axis screw. Here, I don't think there's anything mechanical that has a pitch of 200-250 um. I'm using 40 um layers because that matches the distance travelled by a full step of the z-axis stepper motor.
The second photo shows two jumps, one about 2/3 of the way up the print and the other about 4/5 of the way up. They tend to occur when the area of the layers is growing quickly, but can happen randomly too.
If you have any suggestions or theories I'd love to hear them!