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11 votes
Accepted

Printed part auto-eject (automatic part removal)

While the "best" method is probably unanswerable since it would be based on very specific requirements and subject to change as soon as a better method were devised, here are some feasible methods to ...
Chris Thompson's user avatar
11 votes
Accepted

What parts are strictly necessary for a 3D printer?

You will certainly find that the print functionality of a 3d printer is a bit more complex than you suggest. The mechanical portions include a means to push the filament into a heated nozzle as well ...
fred_dot_u's user avatar
  • 11.8k
9 votes

Carbon fiber instead of smooth steel rods?

I agree that steel is the best material for rails but the info provided on carbon fiber is just wrong. When making a carbon fiber part, whether a tube or any other shape, you lay the fabric in the ...
Zebra's user avatar
  • 91
8 votes

How do I wire the z-axis motors in parallel on the Prusa i3?

For some unknown reason, everywhere everybody is saying that Z stepper motors need to be connected in parallel... And this was always the only obvious way, until recently some people started to ...
Serge Rabyking's user avatar
7 votes

Ball screw: Maintaining Z axis position when motor is OFF

My question is a ball screw of pitch 4mm or 5mm, will it be able to Maintain it's position when motor is deenergized under a load of 15 kg shared by two systems. The detent torque of a typical NEMA ...
Tom van der Zanden's user avatar
7 votes
Accepted

Why do 3D printers have only one limit switch?

In principle you only need the minimum axis position (or the maximum), the offset to the bed and the size of the bed in the direction of the axes. Fortunately, you can specify this in the firmware: E....
0scar's user avatar
  • 36.3k
6 votes

HDPE as the body of a 3-D Printer?

The main consideration when building the body/frame of a 3D printer is the stiffness. The stiffer the material, the less the frame will deform under load, and the more accurate and repeatable your ...
BlackSquareTaco's user avatar
6 votes
Accepted

Advantages of GT2 over a rack

With a belt system, the belt engages roughly half the pulley. This, and the tension in the belt, ensures the belt always engages the pulley tightly. A belt and pulley system is thus relatively ...
Tom van der Zanden's user avatar
6 votes
Accepted

ABS or PLA for structural printed parts?

To answer the main question "Is ABS better for structural parts of a 3D printer as opposed to PLA". The answer, unfortunately is it depends. ABS has lower yield and ultimate strengths compared to ...
Diesel's user avatar
  • 1,905
6 votes
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Building a 3-D printer

Building a 3-D printer is actually very easy, assuming that you are electronically and mechanically competent, and there are a whole bunch of websites devoted to doing just that. The principal of ...
Greenonline's user avatar
  • 6,573
5 votes

Would using a leadscrew with 1 or 2 mm lead, en lieu of 8 mm, result in a better printer?

From Accuracy vs Precision and Threaded Rod vs Leadscrews in 3D Printers. I have highlighted the relevant parts: In general, FFF/FDM printers use relatively infrequent, small, precise movements on ...
Greenonline's user avatar
  • 6,573
5 votes
Accepted

Can cheap hotend parts sourced from China actually produce good prints?

Hard to say for sure - my whole printer is cheap parts bought as a kit in China by a Chinese student who abandoned it in the US (I resurrected it after it was abandoned.) It includes all the parts you ...
Ecnerwal's user avatar
  • 723
5 votes
Accepted

Lead screws - M8 instead of M5?

as long as you match the parts that is ok. The m8 rod will give you more stiffness and will be harder to bend. As the result, you will have to calibrate the steps/mm settings in the firmware.
profesor79's user avatar
  • 1,982
5 votes
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3D printer out of normal printer (HP PSC 1315)

No, Printers are not good sources Common printers contain at best one stepper motor in the scanner, and it is usually too weak for use as an X or Y stepper, but for a very slow printer they might be ...
Trish's user avatar
  • 22.2k
5 votes

Herringbone timing belt?

At a nearly microscopic level, the herringbone belt/gear combination will reduce the whoosh effect of a square profile cogged belt forcing itself into a matching profile pulley. Consider a well-sealed ...
fred_dot_u's user avatar
  • 11.8k
5 votes
Accepted

Using an Anet A6 3D printer in the UK... (mains voltage issue!)

The UK uses 230 V mains voltage. The 220 V designation is from the past, Europe is now using 230 V. You do not have to worry about the frequency. You should place the switch to 220&...
0scar's user avatar
  • 36.3k
4 votes
Accepted

What is a good book to read about 3D printers?

You can learn a lot just by reading the forums. I'll just list a few that are quite popular... Reprap Forums - Has a ton of information on DIY printers including build logs and posts dealing with ...
tjb1's user avatar
  • 2,110
4 votes
Accepted

HDPE as the body of a 3-D Printer?

I've used what is commonly described as UHMW-PE, aka, Ultra-high Molecular Weight Polyethylene for various projects. You may know this material is often used in cutting boards, as it cleans easily and ...
fred_dot_u's user avatar
  • 11.8k
4 votes

ABS or PLA for structural printed parts?

To answer your question, ABS is better than PLA for parts however I wouldn't use ABS for that, I would use PETG for structural parts. PETG is more durable than ABS or PLA. PETG is more flexible than ...
Brad's user avatar
  • 161
4 votes
Accepted

Is it a good idea to include thermal fuses in a DIY 3D printer design?

Whether you should use a thermal fuse or not depends on what other safety measures you've taken. You can't look at the safety features of a printer in isolation, you need to look at what other ...
Tom van der Zanden's user avatar
4 votes

Prusa i3 Z axis only goes down (even on up command)

It could be a hardware fault. First check, and compare, the control board connections to the motors of the three axes. You don't state it in your question but, presumably, the X and Y axes move ...
Greenonline's user avatar
  • 6,573
4 votes

What size is the lead screw?

You'll need to do some calculation to figure out how long of a lead screw you need. The best solution would be to mock up the entire printer in CAD so you can visualize how everything fits together. ...
Tom van der Zanden's user avatar
4 votes
Accepted

Why not use GT2 en lieu of a Z-axis threaded rod or leadscrew?

A lead screw can be fitted with a anti-backlash nut to get past your concern about backlash. Generally, backlash is not that of a problem considering the weight of the carriage (e.g. Prusa), or whole ...
0scar's user avatar
  • 36.3k
4 votes
Accepted

Adding a battery backup power supply

There are a couple of points to consider with this question. First, you will need to make sure the PSU is correctly adjusted to the float charge voltage of the 12V battery. SLA should be safe to float ...
Sean Houlihane's user avatar
4 votes

Ball screw: Maintaining Z axis position when motor is OFF

Let's pull out physics... We have a load of 15 kg, which is a weight force of 147.15 N, PLUS the bed. Let's take into account about two kilograms of bed and cables that need to be carried too, so 166....
Trish's user avatar
  • 22.2k
4 votes

3D printer out of normal printer (HP PSC 1315)

"Yes" you can, but "No" it is not a good idea. A colleague of me is building a Anet A8 clone from salvaged rods from a bunch of printers he had. The rods are 9 mm in diameter for ...
0scar's user avatar
  • 36.3k
4 votes

Building a cheap 3d printer with DC Motors?

To use DC-motors instead of stepper motors, you would need to have some sort of encoder that tells the controlling machine where the printhead has moved. On the arduino Forums they have discussed ...
Trish's user avatar
  • 22.2k
4 votes

Choice of lead for lead screw

I've not seen trapezoid lead screws with 5 mm lead, you can get 5 mm lead ball screws though. On one printer I use 4 mm lead screws to get native 0.02 mm resolution (so 5 full ...
0scar's user avatar
  • 36.3k
4 votes

Is having 4 bed leveling adjustment points rather than 3 problematic?

Similar reasoning as for question "3 vs 4 bearings for y axis travel"" holds. If you introduce a fourth point, it is more difficult to make a flat plane. Provided that your bed is stiff,...
0scar's user avatar
  • 36.3k
4 votes
Accepted

What are the tradeoffs of a cantilever printer design?

Cantilever printers constrain the X-axis carriage only on one side and have a free hanging side. This means, that the X-beam has to be rather sturdy and is limited in length, making them usually quite ...
Trish's user avatar
  • 22.2k

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