I use a Replicator 2 and often print on the original acrylic build plate. I've found that I have a lot of success getting my prints to stick to the plate if I wait to enable the down fan until I've put down a few layers. I've made a small change to cool.py that I'd like to contribute to enable users to choose when the fan is turned on. Is there a public repo for making code contributions? If not, I've included the diff below:
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< self.turnFanOnAtBeginning = settings.BooleanSetting().getFromValue('Turn Fan On at Beginning', self, True)
---
> self.turnFanOn = settings.BooleanSetting().getFromValue('Turn Fan On', self, True)
> self.turnFanOnAtLayer = settings.IntSpin().getFromValue(0, 'Turn Fan On Before Layer', self, 1000, 0)
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< if self.repository.turnFanOnAtBeginning.value:
< self.distanceFeedRate.addLine('M106')
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> if self.repository.turnFanOn.value:
> if self.layerCount.layerIndex == self.repository.turnFanOnAtLayer.value:
> self.distanceFeedRate.addLine("M106")