8 votes
Accepted

What are the "magic numbers" on a Monoprice Select Mini?

The "magic numbers" are optimal values that work particularly well for the layer height. Michael O'Brien derived these numbers by reverse engineering the mechanics of the Z-axis stepper motor. Using ...
7 votes
Accepted

What is causing the walls of my prints to separate?

I have faced the same issue if it concerns just gaps between the walls (to the point you could put a nail in between the outer and inner perimeters, so clearly the perimeters were not bonding), for me ...
  • 31.4k
7 votes
Accepted

Monoprice Select Mini - Detached Filament Feeder fitting

Solution - there is a set-screw and a square nut in that T-slot which holds the feeder fitting in place on the heat sink. One may well think (as I did) that the fitting is threaded into the heatsink,...
  • 301
7 votes
Accepted

What is the largest microSD card that a Monoprice Select Mini can read?

Unfortunately, the answer isn't as simple as that a specific size of SD card works and another size doesn't. The Marlin firmware wiki mentions: The SD- or MMC- Card must be formatted as FAT and ...
7 votes

How to format an SD card for Monoprice Select Mini V2?

For an SD card to work with the printer firmware Monoprice suggests to format the SD card to FAT32. However, the Monoprice Select Mini V2 is not able to read SDHC memory cards, it is advised to use ...
  • 31.4k
5 votes

Monoprice Select Mini V2 retraction/stringing problem

The Monoprice Select Mini V2 uses a Bowden style extrusion system. Bowden extruders compress the filament in the tube where the gap between the filament and inner tube diameter allow for the filament ...
  • 31.4k
4 votes
Accepted

Why did my print fall off its raft?

Your trouble lies within the presliced G-code: the temperatures are rather low for PLA and upping both by 10 degrees would be advisable: 200 °C for the Hotend 60 °C for the Bed Atop that, printing a ...
  • 19.8k
3 votes
Accepted

"print" menu not loading on Monoprice MP Select Mini V2

Too many files on SD card I removed some files and now it works, it seems like the menu would not load if the SD card contained more files than the printer could display on the print menu (they didn't ...
3 votes

Why did my print fall off its raft?

It looks to me as the model did not have enough surface contact with the raft. This can be caused by to big of a gap between raft and model set in the slicer or because of Underextrusion. The part ...
3 votes

Monoprice Select Mini v2 clogged Boden tube connection

If you are heating your hotend to 60/80, that is WAY too low. PLA should be at 180+ hotend, and if you are using a heated bed, 60-80. I would try increasing the heat of your hotend, starting at 180 ...
3 votes
Accepted

Z-Axis zero/home position is higher than the actual print starting position

Check the Z-drive for any component looseness. Look at belts, gears, anything with screws. Wiggle things mercilessly checking for play. At the start of a normal print run, the the print head ...
  • 459
3 votes
Accepted

Gaps in Cura's Slicing for Monoprice Select Mini V2

If you enable the option "Coasting", the extruder will follow the extrusion path at the end of switching to the next layer or the next section, but will not deposit any material as it uses the build ...
  • 31.4k
2 votes

What is causing the walls of my prints to separate?

I dont know if I understand you correctly, but let me try... It could be that the wall-thickness of the part you try to print is to thin or is not "compatible" with your nozzle size. Lets say your ...
  • 131
2 votes
Accepted

Monoprice Select Mini V2 retraction/stringing problem

What I ended up doing was using the settings from the cat.gcode that came with the printer. It has a retraction of 10 mm specified, which I thought was a bit much, but if it works, it works.
  • 181
2 votes

Monoprice printer: no files found on SD card

I've no idea why 3D printers don't like SD cards formatted by operating system utilities, but they don't. Use SD Memory Card Formatter to format your memory cards. Unfortunately, you have probably ...
  • 2,972
2 votes

How to format an SD card for Monoprice Select Mini V2?

I was having problems formatting micro SD cards for my Monoprice Mini v2. I have some 256 MB cards tried formatting them FAT FAT32 etc, no luck. Then I downloaded a program called SD Memory Card ...
2 votes
Accepted

2x scaling of Monoprice Mini Select v2 Firmware v30.50b after factory reset?

Thanks for the comments! They led me to find this solution using PuTTY on Windows as my serial (COM) terminal. I guess one of my resets put the settings to 1/16th stepping whereas my hardware has 1/...
2 votes
Accepted

Help diagnose Z-banding

This differs from the traditional banding as observed from Z wobble induced banding as e.g. explained in this answer. Your banding patterns clearly seem to form diagonal bands, this is most probably ...
  • 31.4k
1 vote

Retuning a very delicate and tricky print after print failure

The print is extremely challenging, as it has a lot of thin diameter items growing up, a lot of overhangs and a rather small surface to hold to the bed. So you need a Brim and support: As OP found, a ...
  • 19.8k
1 vote
Accepted

Monoprice select mini V2 displaying '999' degrees for build plate temp

You get this temperature reading when there is broken wire. Not owning this printer type, can't you switch out the bed thermistor for a new one? Or alternatively check if a connection is loose.
  • 31.4k
1 vote
Accepted

Filament consistently jamming / clogging in Bowden tube on MP mini 3

If you have it for years, have you ever replaced the Bowden tubes and hotend liner? This printer might be in need of some dire maintenance. Also check if the Bowden tube is securely fixed, if infill ...
  • 31.4k
1 vote

Monoprice select mini underextrusion?

The grooves (notches, more accurately) are acceptable and indicate that your hobbed gear has a good grip on the filament. Many factors will cause your probably-correct diagnosis of under-extrusion. ...
  • 10.2k
1 vote

Poor adhesion on new layer - Monoprice mini select

If you have already used alcohol to eliminate grease and fingerprints, sometimes scrubbing the print surface with a regular green scotchbrite pad can restore adhesion. It micro-scratches the surface ...
1 vote

Poor adhesion on new layer - Monoprice mini select

You could try a higher bed temp, but also check to make sure bed is levelled all round as this can sometimes cause this to happen
1 vote

Monoprice Select Mini v2 - Some Prints Freeze

If you go to the Monoprice website you will find a dedicated page for Ultimaker Cura. From the page you can read that: Cura now includes profiles for the MP Select Mini V1 and V2. Go to “...
  • 31.4k
1 vote

Gaps in Cura's Slicing for Monoprice Select Mini V2

I have had a similar thing happen when slicing a large piece that has - in real life - walls of about 2 cm. By scaling it down to 1.5%, this become less than the wall thickness, and the wall was ...
  • 19.8k
1 vote

Z-Axis zero/home position is higher than the actual print starting position

I just had this issue with my Monoprice Select Mini V2. It seems there's some bug in the software if you already have the 3D printer at its lowest Z-elevation before starting the home calibration. To ...
  • 11
1 vote

What is causing the walls of my prints to separate?

Yup I can tell at a glance it is under extrusion. I bet the issue is temp. Test your steps per MM for E. See https://reprap.org/wiki/Triffid_Hunter%27s_Calibration_Guide Measure Required tools: ...
  • 3,003
1 vote

What is causing the walls of my prints to separate?

When printing someone else's model, your print is at the mercy of their design. Designing for multiple printers is hard work, and even if something is printable on 90% of printers, you may be in the ...
  • 459

Only top scored, non community-wiki answers of a minimum length are eligible