paenian / doppelbot

Because I like designing 3d printers.

doppelbot

Because I like designing 3d printers.

I made a deltabot, and it's really cool. I can print really tall things.

But 3d prints are weakest in Z - printing really tall is maximizing the weak axis.

So instead of maximizing Z, I though about maximizing Y. First concept here is the DoppelBot, which is a cube-shaped reprap that's easy to enclose, and has, by default, a one cubic foot build area. the print area of a standard reprap. It accomplishes this 'twice as big' by the simple expedient of using two heated beds.

The basic design uses two lasercut endcaps, joined by OpenBuilds V-Rail. The lasercut endcaps ensure that your rails are perfectly perpendicular and parallel - they don't even need to be cut to the exact correct length. The machine itself uses a CoreXY gantry, and a Z bed with 3 independent leadscrews - so that the bed can truly level itself, none of this bed-level-compensation, if your bed is flat this machine will be able to tram it.

I'm experimenting with 9mm belts and over-built 3d printed carriages, to increase rigidity.

Also experimenting with a continous build system, wherein you can print dozens of objects in a row without human intervention.

[[/images/complete_machine.jpg|Doppelbot running its first print]]

doppelbot's Issues

Option for other bed height sensors on extruder

BL Touch & Induction sensor, mainly.

Build integrated Gantry Extruder

The extruder attached to the gantry is cumbersome, and needs work - it'd be easier and stronger to create an extruder that's mounted directly to the gantry.

Ideally, several extruders, such that they can be swapped out with minimal time.

1. tensioner needs to be moved to the rear gantry.
2. belt should snap over/onto the front gantry, with some sort of clip to hold it in place.
3. Aero can be mounted motor-to-the-rail

Print Cooling Fan for Titan Aero

Create a print cooling fan mount - use the two front Aero bolts to mount?

double tensioners on rear gantry

Angle the belt tensioner in order to add another tensioner for the other half of the belt - cross-tensioning.

Create a wiper

To clean off the nozzle before every print - maybe a stiff brush? Wiper should be easily replaceable.

Print Ejection System