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I do not have an answer to your question, but there might be other issues with your approach:
- Overhanging edges tend to curl up, which causes the nozzle to bang into these curls, and which might knock the model off the glass.
- The support material might not stick very well to the steep slopes of the arches.
I think it might be worth trying vertical support columns and then a horizontal dummy bridge. Then you only need support material on top of that bridge, so it would consume even less support material. The bottom of that dummy bridge will of course sag, but that doesn't matter, since you throw that away anyway. On top of that support-bridge you could even make some dovetail slots, to make the support material stick well.
You could design all this manually, but I think there is an experimental feature from user smartavionics to do this automatically? Some time ago he was working on it, if I understood it well?
If Cura wouldn't let you remove the supports, an option would be to disable support totally, and design all the supports in your CAD file, and then assign them to the correct nozzles in Cura. This gives you total control.
See these pictures. They are from various different designs and tests, but you get the concept:
Edges of overhangs severely curling up, about 1.5mm, so the nozzle banged into these curls, which knocked the model off the glass and created a nice spaghetti.
Dummy support bridge, which is removed after printing. Here the support bridge is hanging from the walls of the real object, so it does not have its own legs. But for more stability or if you don't want to scar the real object, you could of course give the bridge its own legs.
Dovetail system for adding mechanical grip of the support material to the dummy bridge.
Cura 5.7 is here and it brings a handy new workflow improvement when using Thingiverse and Cura together, as well as additional capabilities for Method series printers, and a powerful way of sharing print settings using new printer-agnostic project files! Read on to find out about all of these improvements and more.
S-Line Firmware 8.3.0 was released Nov. 20th on the "Latest" firmware branch.
(Sorry, was out of office when this released)
This update is for...
All UltiMaker S series
New features
Temperature status. During print preparation, the temperatures of the print cores and build plate will be shown on the display. This gives a better indication of the progress and remaining wait time. Save log files in paused state. It is now possible to save the printer's log files to USB if the currently active print job is paused. Previously, the Dump logs to USB option was only enabled if the printer was in idle state. Confirm print removal via Digital Factory. If the printer is connected to the Digital Factory, it is now possible to confirm the removal of a previous print job via the Digital Factory interface. This is useful in situations where the build plate is clear, but the operator forgot to select Confirm removal on the printer’s display. Visit this page for more information about this feature.
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geert_2 557
I do not have an answer to your question, but there might be other issues with your approach:
- Overhanging edges tend to curl up, which causes the nozzle to bang into these curls, and which might knock the model off the glass.
- The support material might not stick very well to the steep slopes of the arches.
I think it might be worth trying vertical support columns and then a horizontal dummy bridge. Then you only need support material on top of that bridge, so it would consume even less support material. The bottom of that dummy bridge will of course sag, but that doesn't matter, since you throw that away anyway. On top of that support-bridge you could even make some dovetail slots, to make the support material stick well.
You could design all this manually, but I think there is an experimental feature from user smartavionics to do this automatically? Some time ago he was working on it, if I understood it well?
If Cura wouldn't let you remove the supports, an option would be to disable support totally, and design all the supports in your CAD file, and then assign them to the correct nozzles in Cura. This gives you total control.
See these pictures. They are from various different designs and tests, but you get the concept:
Edges of overhangs severely curling up, about 1.5mm, so the nozzle banged into these curls, which knocked the model off the glass and created a nice spaghetti.
Dummy support bridge, which is removed after printing. Here the support bridge is hanging from the walls of the real object, so it does not have its own legs. But for more stability or if you don't want to scar the real object, you could of course give the bridge its own legs.
Dovetail system for adding mechanical grip of the support material to the dummy bridge.
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