Vertical Exhaust Fan Housing for Omtech K40+ Laser - Free 3D Print Model

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techcomputing

Hobby & DIY>Other Hobby & DIY

IP Report

Print Profile(1)

All

H2D

P1S

P1P

X1 Carbon

X1E

A1 mini

H2D Pro

H2S

P2S

H2C

X2D

A2L

0.2mm layer, 3 walls, 10% infill

Designer

13.7 h

5 plates

Open in Bambu Studio

Boost

Released

Description

This is a new design to boost the effectiveness of the exhaust fan supplied in the (recent) Omtech K40+ laser engraver/cutter.

The supplied fan is a 120mm dia. axial fan housed in a small box at the rear of the K40+. Its enclosure severely compromises the fan's output by a) cramped inlet flow, b) partially blocked outlet that covers near 50% of the fan's discharge area, and c) for many owners - the need to divert the airflow duct by 90degrees to clear the laser and the wall behind it.

Knowing that axial fans cannot tolerate much backpressure, the 3 design compromises must significantly reduce the possible airflow.

My design relocates the fan to an external box behind the laser. It addresses the 3 compromising issues by: a) the fan's inlet box/plenum has more space for the airflow to staighten up, b) the fan's discharge is 100% clear and aerodynamic spinners on the inlet/exit of the fan's motor, and finally c) the exhaust is already turned 90degrees - pointing upward.

I printed the fan housing in pieces to facilitate 3D printing with minimal supports. Some superglue along with some M4 bolts to re-mount the fan and the housing were all that is needed.

I used PETG to minimize any future warping due to heat. Although there is minimal heat in the airflow, nor stress on housing so PLA may work OK.

Comment & Rating (4)

@Ruthalas

I did not have the required length of fastener, but managed to assemble it with shorted ones. It works well, and the increase in flow is noticeable.

The designer has replied

@techcomputing

Pleased to see that it is working for you. I found that the rearranged fan definitely pumped the smoke out of my workshop.

@kostas.christod

I use M4x60mm fasteners.. the problem is that the CO2 tube cover can’t be open directly in order to check if the is any air bubbles in the water around CO2 tube.

(Edited)

The designer has replied

@techcomputing

Agreed, the blocked access to the tube is a flaw in the design. I have since sold my laser, so i won't be making any updates to the design - please feel free to modify it anyway you like.

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