Ohm/How to build an OHM

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Introduction

The Open Hybrid Mendel (OHM) has several advantages over the generic Mendel model. Mainly, it is more flexible. The extruder carriage and printing board are designed to easily pop off the machine without unscrewing any parts.

All STL files mentioned in this article are referring to, and can be downloaded from the OHM Parts section.

Mechanical Construction

Frame

Frame Triangles

Parts

To make the frame triangles, 6 frame vertices, 2 bar clamps and 6 threaded bolts are needed.

Frame Vertex part
Bar Clamp part

Assembly

(Assembly guide. Delete this note when section is finished)

Tips

(Extra tips to help assemble. Delete this note when section is finished)

Connecting the Triangles

Parts

(Parts needed for assembly. Delete this note when section is finished)

Assembly

(Assembly guide. Delete this note when section is finished)

Tips

(Extra tips to help assemble. Delete this note when section is finished)

Z Drive System

Z-Axis Motor Mounts

Parts

(Parts needed for assembly. Delete this note when section is finished)

Assembly

(Assembly guide. Delete this note when section is finished)

Tips

(Extra tips to help assemble. Delete this note when section is finished)

Z-Bar assembly

Parts

(Parts needed for assembly. Delete this note when section is finished)

Assembly

(Assembly guide. Delete this note when section is finished)

Tips

(Extra tips to help assemble. Delete this note when section is finished)

X-Z Assembly

X-Axis Motor Mounts

Parts

(Parts needed for assembly. Delete this note when section is finished)

Assembly

(Assembly guide. Delete this note when section is finished)

Tips

(Extra tips to help assemble. Delete this note when section is finished)

X-axis Z-bar clamp

Parts

(Parts needed for assembly. Delete this note when section is finished)

Assembly

(Assembly guide. Delete this note when section is finished)

Tips

(Extra tips to help assemble. Delete this note when section is finished)

Connecting the X-Axis to the Z-Axis

Parts

(Parts needed for assembly. Delete this note when section is finished)

Assembly

(Assembly guide. Delete this note when section is finished)

Tips

(Extra tips to help assemble. Delete this note when section is finished)

Z and X axes Endstops

Parts

(Parts needed for assembly. Delete this note when section is finished)

Assembly

(Assembly guide. Delete this note when section is finished)

Tips

(Extra tips to help assemble. Delete this note when section is finished)

OpenY Axis

Y-axis Guide Bars

Parts

(Parts needed for assembly. Delete this note when section is finished)

Assembly

(Assembly guide. Delete this note when section is finished)

Tips

(Extra tips to help assemble. Delete this note when section is finished)

OpenY Assembly

Parts

(Parts needed for assembly. Delete this note when section is finished)

Assembly

(Assembly guide. Delete this note when section is finished)

Tips

(Extra tips to help assemble. Delete this note when section is finished)

Print Bed

Parts

(Parts needed for assembly. Delete this note when section is finished)

Assembly

(Assembly guide. Delete this note when section is finished)

Tips

(Extra tips to help assemble. Delete this note when section is finished)

Motors, Belts and Endstops

Parts

(Parts needed for assembly. Delete this note when section is finished)

Assembly

(Assembly guide. Delete this note when section is finished)

Tips

(Extra tips to help assemble. Delete this note when section is finished)

Extruder

Carriage

Parts

(Parts needed for assembly. Delete this note when section is finished)

Assembly

(Assembly guide. Delete this note when section is finished)

Tips

(Extra tips to help assemble. Delete this note when section is finished)

Motor Mount

Parts

(Parts needed for assembly. Delete this note when section is finished)

Assembly

(Assembly guide. Delete this note when section is finished) This unfinished part includes the main driven gear, idler and lastly the main section.

Tips

(Extra tips to help assemble. Delete this note when section is finished)

Hot Tip + Electronics

Parts

(Parts needed for assembly. Delete this note when section is finished)

Assembly

(Assembly guide. Delete this note when section is finished)

Tips

(Extra tips to help assemble. Delete this note when section is finished)

Spool

Spool Assembly

Parts

(Parts needed for assembly. Delete this note when section is finished)

Assembly

(Assembly guide. Delete this note when section is finished)

Tips

(Extra tips to help assemble. Delete this note when section is finished)

Spool Mount

Parts

(Parts needed for assembly. Delete this note when section is finished)

Assembly

(Assembly guide. Delete this note when section is finished)

Tips

(Extra tips to help assemble. Delete this note when section is finished)

Mechanical Construction

RAMPS

Motherboard

Motor drivers

End Stops

Hot tip

RAMBO

Motherboard

Motor drivers

End Stops

Hot tip