E3D V6 Volcano + Blower + Proximity Sensor Bowden Mount by WayneWeng

Last crawled date: 2 years, 12 months ago

Hot end mount on x-carrier like Prusa i3 or similar stuff.
SpecificationMounting Hole: M3 bolts, 25mm or 30mm center to center distance.Hot End: E3D V6 Volcano or standard heat block.Heat Sink Cooling: 40mm Axial Fan with this Fan Duct or 30mm Axial Fan with standard E3D Fan DuctFilament Cooling: 5015 Blower like THIS with the designed blower duct.Auto Bed Leveling Probe: 12mm diameter Inductive Proximity Sensor.
NOTES
I wish to design this mount for both E3D V6 Volcano and Standard heat block. And the only thing to do is just to change different blower duct. It only matters of height in order to make the air blown to beneath the nozzle. But currently only blower duct for volcano was designed (I use volcano.) For standard heat block, blower duct will be added soon!
For heat sink cooling, I've tried 30mm axial fan and It's not making good thermal condition. Simply because it does not supply enough air pressure to push air through heat sink.
Therefore, I stick with 40mm fan just like for my V5. Now I'm using 4028 axial fan like FFB0412UHN-SP4Z
and it has better performance, not letting the hot end to warm up on the top of heat sink. But it's quite noisy though.
For filament cooling, I use BFB0512HH-F00. Larger air flow than other brand 5015 fan.
For auto bed leveling, I use FOTEK PM12-04N Inductive Proximity Sensor. With 4mm metal trigger distance. Other brands may work as well. It can't be used on a glass surface. Print bed must be metal. Aluminium works but with trigger distance shorter. But it still provides enough distance margin for probing and prevent the probe from hitting things while printing. You need to adjust it carefully before it goes on probing. The nozzle must sit somewhere between probe and bed surface. Make sure:
When z height drops to the point where the probe triggers, that nozzle doesn't touch the bed surface.
When printing starts, nozzle goes down close to the bed surface. You don't want the probe to touch the bed and it should be higher than the nozzle.
The probe might have LED indicators. Otherwise, use G code M119 to check probe status.
For the wiring, because mostly these sensors are powered from above 10VDC. We need to make sure output doesn't go above 5V(for arduino). Though the probe is NPN Normal Open Output type, it still may have internal pull-up resistors with a large value. Therefore, we should limit the output voltage with something like diode 1n4148 or so. I use the wiring from the picture. I didn't place a external diode. Instead, I rely on the internal IO pin protection diode in most digital IOs. It should limit the voltage quite safely. Thus, I don't need any external components from this setup. You could still leave the external diode there for more safety, it's fine. And for those powering with 24VDC, I presume it will still be OK(Quite a small current flow through the large internal pull-up resistor), but let's not make conclusions yet.(If you have experimented to prove OK, I'll be glad for you!)
Video:FAN DEMOProbing and Printing