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#1 2017-07-08 17:55:08

NeelD
Member
Registered: 2017-06-02
Posts: 44

Turn on UV after wait period along with image display.

Seems at the moment UV is turned on and image displayed after wait period.

From kudo3d

During the printing process, the resin under background exposure keeps accumulating photons. Once the number of photons received per unit area reaches the threshold dosage, the resin will start turning into solid.
Have you ever seen bits of resin flakes attached to your print? This is a physical example of background exposure affecting your print. The reason for this is because the resin close to the printing zone is being cured slowly by both the background exposure and the scattering light from the pattern. Once the resin in the region near the patterns accumulates enough photons, thin layers attaching to the model may form and get separated from the Teflon film (as shown in the Photo 1). Sometimes, part of the layer could drop or remain at the vat floor (as shown in the Photo 2). A model that requires a longer time to print is more likely to form these flakes. The worst case scenario is when a fast resin is cured by the background light, it could stick to the vat floor firmly and pull your model out of the platform or even break your model into two pieces.

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#2 2017-07-08 20:01:23

Shahin
Administrator
Registered: 2016-02-17
Posts: 3,541

Re: Turn on UV after wait period along with image display.

What do you suggest? Even if we turn on in same time as displaying image, as I know some of LED lights require some time to go full power.

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#3 2017-07-09 17:12:16

NeelD
Member
Registered: 2017-06-02
Posts: 44

Re: Turn on UV after wait period along with image display.

I guess the feature was developed for projector shutter? and was thinking for LCD/UV we might need another solution. May be slightly increasing the cure times might help getting rid of background curing with starting UV same time as displaying image on LCD.

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#4 2017-07-10 05:46:06

Shahin
Administrator
Registered: 2016-02-17
Posts: 3,541

Re: Turn on UV after wait period along with image display.

It is not ideal. Maybe delayed command [[Delayed 2 M1234]]

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