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Economy metal structure 3D printer. Marlin instruction set compatible firmware. Plain G-code is directly supported.

Type FDM 3D printer
Build Platform Aluminum Heat Bed
Extruders 1
Nozzle 0.4mm Dia.
Max Print Speed 55mm/sec (Higher speeds may results in loss of detail)
Print Precision 0.1-0.2mm
Optimal Layer Height 0.04375, 0.0875, 0.13125, 0.175, 0.21875, 0.2625, 0.30625
Build Size 120*120*120mm (4.7“ x 4.7” x 4.7“)
Max Hotend Temp 250°C
Max Bed Temp 60°C using on board controls / 85°C using G-code
Precision X / Y axis 0.1mm, Z axis 0.04375mm
Filament 1.75mm dia ABS, PLA, PETG ; also possible- HIPS,Nylon and Wood filaments
Connectivity MicroSD card, Mirco USB connector, WiFi 2.4 GHz b/g/n
Baud Rate USB: Any is okay. 115200 Works without issue. Higher rate should work also.
Display IPS color LCD screen (non touch)
AC Adapter Input Power 100 ~ 240 VAC, 50/60 Hz
Input Power 12 VDC, 10A
Power Consumption 120 W
Input File GC, GCODE (STL & OBJ files must be converted to G-code)
Compatibility Windows, MacOS, Linux
Dimensions (H x W x D) 13.5” x 11.3 x 7.5“ (343 x 287 x 191 mm)

Motion Controller Board

The motion controller board or mainboard is powered by a STM32F103C8T6 “ARM®Cortex®-M3 32-bit RISC core operating at a 72 MHz frequency”. See for full specifications.

There have been more than two variations of the Motion Controller Board but these were minor changes. One example of the minor changes is the stepper drivers originally shipped with each having their own heat sink. Sometime shortly after initial batch of Select Mini's that Monoprice started shipping to customers on May 26, 2016 the stepper drivers shared one heat sink that spanned across all four. The units that shared one heat sink may have also been in the first batch of 500 printers that were shipped.

Old version (discontinued as of roughly middle of August 2016)

Updated version (middle of August 2016 - present)
From printer received September 2, 2016

A fan header was added to the Motion Controller board. This connector is intended for additional fan for cooling the mainboard. The fan is supposed to start if the mainboard temperature goes above 55C.

The fan header on the pictured revision will not work without a small hardware modification. The fix requires reversing the small MOSFET (SOT-23) upside down to make it correct (I ASSUME the one adjacent to the fan header). “The design engineer made a mistake that reversed the package”. The next shipment of machines was supposed to have this correction already applied. Motion Controller firmware version 26 or higher is required to use the additional fan header. There are very limited reports that this fan header works. YMMV

specifications.txt · Last modified: 2017/03/02 01:40 by matthew_upp