Robertspark wrote:watching with interest, I'd like to know what hardware would be required to put together a 3d printer with uccnc (other than the std X,Y,Z table, steppers, drivers, etc etc).
A 3-D printer is actually just a CNC with the spindle replaced with a printer head which releases melted plastic in a controlled way, instead of removing like a rotating cutter does, so in my opinion it should be pretty easy to convert any CNC into a 3D printer.
Robertspark wrote:I've got a little 6040 XYZ table with 1605 ballscrews thats boarderline for aluminium milling on rigidity, but good for laser, pcb and probably 3d printer work.
It is my understanding that speed and acceleration is the most important for a 3D printer, so if you have enough of that then it should be possible. My machine uses also 1605 screws, so there is an upper speed limit. If that is going to cause a problem or not, well... that remains to be seen. Anyway, I just want to test the output and the quality. If I am happy and want to do more 3D printing I will probably buy a dedicated printer later on. Another issue may be the Z clearance. I don't know if that is an issue for you, but for me that is 135mm, so I think that's going to be more than enough for me.
Robertspark wrote:will uccnc do dual head? (2 colour or support?)
The filament is fed by the stepper connected to the A axis. I assume that colour change in 3D printing is done similar to tool changing in a CNC... so my idea is to use that to trigger an output which would enable/disable a stepper driver, so for example if a driver_1 is enabled then driver_2 is disabled. Both drivers could receive the same step pulses from UCCNC, so the A axis can still feed the filament, after all, only the stepper connected to the enabled driver will actually feed the filament. Of course, such approach may need some additional effort, but I think it is feasible. Anyway, I will probably start with one single printer head.
Robertspark wrote:would it be a good idea to put it within a temperature controlled enclosure for a better finish?
I don't think it is a good idea or necessary. What is important is the melting temperature of the filament because that is effecting the quality. Not an expert in the area, but that is my understanding. The machine normally is already in a constant temperature enclosure (the room it is in), unless you keep your machine in a garage environment with the garage door constantly opening/closing during winter or some cold and windy days. Indoors in a normal environment the temperature is constant enough. Also, the melted filament must be cooled pretty fast after it is placed where it should be, so the most important part is the melting and cooling process, not where the machine is. What I know is that high humidity is also negative, but that mainly effects the storage of filament.
Robertspark wrote:AC, if you did a build / conversion blog, can you post a link here please and I'll follow with interest there may be others two.
Yes, I will keep everyone informed, but remember that this is still just a seed in my head, I still need to sow the seeds and it will take time before we can reap...
Right now it is just in an early phase of research and reading and sharing some premature ideas.