| The Breakroom > The Water Cooler |
| 3D printing |
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| efrench:
A good analogy would be a three legged stool compared to a four legged stool. It's easy to get three legs all touching the ground at the same time, but it's rather difficult to do the same with four. Four points are over constrained and will cause stress in the plate which may lead to the plate being warped. I think it's more likely the glass will take on the shape of the plate rather than straightening it. |
| picclock:
@EFrench The bed levelling issue is mad. The bed is levelled by adjusting a heater board which buckles under heating due to differential expansion and is attached via the screws and springs which is dubious at best. Much better (IMHO) to fix the glass and level it, then clip the heater board to the glass and let it go where it will. I think some edge connection clamps for the glass, rigidly mounted to the y carriage with space underneath for the heater to attach would be a significant improvement, and once leveled should not need an readjustment. Best regards picclock |
| efrench:
In that case I'd attach the heater to an aluminum diffusion plate. If you're going to be printing multiple items, then you will want to remove one glass plate to cool while printing on the next. My diffusion plate is 8mm thick (400mm diameter) Mic6 aluminum and is attached at three points. The bolt holes are oversized to allow for expansion. Initially the heater will be held against the bottom of the diffusion plate with springs. If this isn't satisfactory, then I'll use a silicon glue. |
| Swarfing:
Peter the ramps unit is fixed to the left triangle you see in the picture. unfortunately that is the only pic i have supplied by the owner. I only built him the basic unit and left him to finish all the wiring etc but I did have it running smoothly before handing it over. it leaves plenty of room for the electronics and the z axis is no problem at all with height. In short you can make things as thick as you like without affecting anything at all. The opening is still as per the original so no problems there with bed movement etc. Don't forget the original design is to try and make it as cheap as possible in-line with the reprap philosophy. |
| PeterE:
Swarfing, Thank you very much for answering. It verified what I needed to find. Just trying to compile as much info as possible before attacking the wood with a saw. My version will be a wooden box framed Prusa i3 Reworked or at least something close to that. Bits have been ordered and are on their way in. :drool: /Peter |
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