'Cool' feature
Posted by fma
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'Cool' feature December 08, 2011 04:03AM |
I guess that the cool option is on the todo list. From my point of view, it is a not too hard feature to code, but really usefull one.
Skeinforge has 2 ways to cool the layer: either by extruding at normal speed and then orbiting to wait the given minimum time for the layers, or by slowing down the speed rate. There is also a param to switch on/off the fan. Even if I think it as a very good idea, I didn't try it yet (I don't have a controlled fan).
A mix of all these features could be nice. There are 2 problems with small layers:
- running at normal speed on small perimeters often make garbage, even if the layer has time to cool down (orbit mode). The new param of Slic3R is great for that purpose!
- even with small speed on small perimeters, it is good to let the layer to cool down. Orbit mode is a good way, and turning fan on too.
I don't have really clear ideas about the way the orbit and fan should be managed. Should the fan be switch on during the extruding of small perimeters, on only during orbit? I think that the second way is better, has the first could prevent the layer to stick correclty on the previous one (this is the case when extruding at very high speed: the part is very fragile).
But then, how long should it be turned on? I think we need a parameter for the minimum layer time. If this delay is not reached, then the orbit mode should start. Here, without fan, the orbit should wait the end of the layer time value. If the fan mode is active, we could wait less time. So, another param is maybe usefull. Or it can be computed automatically (if the number of params grows too fast, Slic3r will soon mimic Skeinforge
)
In orbit mode, be sure to orbit over all perimeters, if serveral where extruded on the last layer; Skeinforge sometime orbit only on the last island...
In any case, I plan to make a fan with a small duct, to blow only very close to the hot end, to avoid warping.
Ok, these are just suggestion to start the discussion. I'm sure you have better ideas!
Frédéric
Skeinforge has 2 ways to cool the layer: either by extruding at normal speed and then orbiting to wait the given minimum time for the layers, or by slowing down the speed rate. There is also a param to switch on/off the fan. Even if I think it as a very good idea, I didn't try it yet (I don't have a controlled fan).
A mix of all these features could be nice. There are 2 problems with small layers:
- running at normal speed on small perimeters often make garbage, even if the layer has time to cool down (orbit mode). The new param of Slic3R is great for that purpose!
- even with small speed on small perimeters, it is good to let the layer to cool down. Orbit mode is a good way, and turning fan on too.
I don't have really clear ideas about the way the orbit and fan should be managed. Should the fan be switch on during the extruding of small perimeters, on only during orbit? I think that the second way is better, has the first could prevent the layer to stick correclty on the previous one (this is the case when extruding at very high speed: the part is very fragile).
But then, how long should it be turned on? I think we need a parameter for the minimum layer time. If this delay is not reached, then the orbit mode should start. Here, without fan, the orbit should wait the end of the layer time value. If the fan mode is active, we could wait less time. So, another param is maybe usefull. Or it can be computed automatically (if the number of params grows too fast, Slic3r will soon mimic Skeinforge
)In orbit mode, be sure to orbit over all perimeters, if serveral where extruded on the last layer; Skeinforge sometime orbit only on the last island...
In any case, I plan to make a fan with a small duct, to blow only very close to the hot end, to avoid warping.
Ok, these are just suggestion to start the discussion. I'm sure you have better ideas!
Frédéric
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