Build Your Own SLA/SLS

Hi,

If you are using a flex-vat as I am, you probably noticed that you need several mm (5-10 mm) of lift to separate the part from the FEP-film.
But this is only true for the first layers (10) where I use a longer exposure-time, to get a good binding to the platform, and I need extra distance in the lift.

However, I don't need the extra distance for the remaining layers, since the lower exposure-times gives me a easy peel (and I don't need the extra lift-distance).

So what I would like to see is 2 different lift-distance-settings.

- One for the first layers (Increased Exposure, Increased Lift-distance)
- One for the remaining layers (Lower Exposure-Time, Shorter Lift-distance)

This would save me ALLOT of time during a print.

Please consider this extra lift-distance-setting, accompanied with the first layers exposure-time-setting.

That would definitely be handy...I end up doing the same thing. The work around to keep the print from being obnoxiously time consuming is to manually edit the gcode file, so that the peel and delay on those first 10 layers (or however many) are extra long, but the rest are normal. Not ideal, but it's not hard to do either.

You should be able to edit the Gcode prelift/lift segments to accomplish what you need to do. I just posted an updated user manual that shows how to work with the gcode pre-processor here:


Please let me know if you need any help editing the gcode pre-processor statements.
-Steve

Ok,

Think I solved it :

{$CURSLICE <= $NumFirstLayers?G1 Z($ZLiftDist * 2 * $ZDir) F$ZLiftRate:}
{$CURSLICE > $NumFirstLayers?G1 Z($ZLiftDist * $ZDir) F$ZLiftRate:}
{$CURSLICE <= $NumFirstLayers?G1 Z(($LayerThickness-$ZLiftDist * 2) * $ZDir) F$ZRetractRate:}
{$CURSLICE > $NumFirstLayers?G1 Z(($LayerThickness-$ZLiftDist) * $ZDir) F$ZRetractRate:}


Now I need to fix the blank-time ....