United Kingdom
Asked — Edited

Do They Need Supports

Im definatley a noob to 3d printing, but i got my first 3d printer yesterday and was going to print some of the ez bits. My question is, for the servo arm should i use supports?

I know it may be a daft question to some, but i dont have enough material to risk doing it wrong


Upgrade to ARC Pro

With Synthiam ARC Pro, you're not just programming a robot; you're shaping the future of automation, one innovative idea at a time.


Try printing it.... If it doesn't turn out right change your settings. ... each printer is different so it's just trial and error until you get your settings dialed in correctly. ....

United Kingdom

i was afraid of that. thank you


A lot of this depends on the printer and the features that the printer has, and how tuned in you have your printer. You will find that as you print you will make adjustments to the printer and the software used to slice the object for the printer that will affect what you will be able to print with or without supports.

Because of all of this, it is a trial and error thing. Even if someone else has your exact setup, you will find that your settings will probably be slightly different. I would plan on printing for a bit before you get you setting down right. There is a lot of learning that goes into using a 3d printer, but some printers are better than others at being more of an unboxing it and print type of printer.

United Kingdom

yeah ive noticed theres an aweful lot of stuff to think about. i got a da vinci jr and some things i dont get yet


Richard and Dave have given you good advice. It may be best to print a test piece. There are many how to videos on You Tube. Try to find some on your printer. Watch a few and see how files are converted to .STL and loaded for printing. Check how settings are made (also depends on materials used, PLA, ABS etc.) and loaded. Trial and error is the way to learn. If you want to use the lever, go for it. Lay it flat and see what happens.

I am sure many others will help you, but you need to try a part. You will need to buy more filament so consider it soon.

Ron R

United Kingdom

thank you all for the help. i think maybe nerves about something new just got the best of me. thanks again

United Kingdom

has anyone ever had to rescale their stl file for the lever?


Make sure your using metric for your slicer. Almost everything is in metric for 3d printers and for stl files.

United Kingdom

thanks. I did want the 1.0a, but it was just out fo my price range


The main thing is to look up the sites, ask questions and go for it.. You will "get hooked" and have fun. Buy some more filament and start printing.

There are many EZB 3d files which you can print. Get the simple ones to start. Also get use to your machine, and be patient. I write down my settings so I can watch my progress.

Let us know what you are using for software.

Ron R

United Kingdom

well, as im using davinci jr, im using standard XYZware. Didnt know any others would work


Just checking .. Ok .. You asked about scaling issue. Is that resolved? Also you are using PLA, Right?

Ron R

United Kingdom

yah pla. Well, i printed out the lever and it just seems a little small, plus the it wouldnt fit onto the part where the servo horn usually goes. TRied to force it but had no luck.


Some printers have a bit of accuracy difference - which can be a little frustrating at times. This is where a hand file comes in handy:D

Also the direction that is printed on the print bed also matters. If it is aligned horizontal or vertical. Oh, and the resolution that it is printed at. The resolutions are displayed for each 3d printable part in the ez-robot library.

And lastly, the type of servo that is being used may have a different horn size. All the parts are designed around the ez-robot HD servos, which have the same horn size between HD and Micro.


To add to what @DJ mentioned, the size needed is a 25 tooth servo output gear, that's what the ezrobot servos are.

United Kingdom

User-inserted image

See, this is why I love this forum. Everyone is always so helpful and freindly, even if i seem to ask a simple question.

Thanks djsures and jeremie, the servos im using are from hobbyking. awesome servos but don have a clue how many teeth they are.

I added the part im printing as it was in the stl file ( image attached ). 0.1mm resolution and ive added supports and rafts if its as simple as my servo output gears are a little larger, i can deal with that so thats fine. When these first came out, i had a company send me a sample print of this lever and it fit perfectly.

In fairness, im now doing my 3rd ever print and i seem to be getting closer to understanding things a little more

United Kingdom

Ok so i just completed the lever print, used rafts and supports picked away at each little part and managed to force it onto theservo and it holds stron and is the perfect size. thanks guys!

United Kingdom

just a question about the next peice, the bit that goes onto the back of the servo to complete the servo arm. Am i supposed to remove the servos own back and replace it with this or does it just go straight on?


Remove the one presently on the servo and replace it with the one you print out. Use care so you don't pull the motor out when you disassemble it or pinch wires upon reassembly.

I have made a few and they work well.

Ron R