Jump to content
UltiMaker Community of 3D Printing Experts

Stepper Motors for Custom made Ultimaker Original


Recommended Posts

Posted (edited) · Stepper Motors for Custom made Ultimaker Original

Hi all!

I'm building an Ultimaker Original from scratch so it's custom made, I'm also not electronic savy at all. The final hardare I need to purchase are the stepper motors. I've read a lot of information posted here and in other forums, and I came to a number of motors that seem adecuate for purchasing for my Ultimaker.

The original specs for the stepper motor from the BOM of the Ultimaker Original are as follows:

Step angle (º): 1.8

Temp. Rise (ºC): 80 max

Amb. Temp (ºC):  (-20~ +50)

Nr. of Phase: 2

Insulation Res. (M ohm): 100 min.

Insulation Class: Class B

Max. Rad. Force (N): 28

Max. Axial Force: 10

Rated Voltage (V): 2.8

Rated Current (A): 1.68

Res. / Phase (10% Ohm): 1.65

Inductance / Phase (20% mH): 3.2

Holding Torque (N.cm): 36

Detent Torque (N.cm): 150

Rotor Torque (N.cm²): 54

Weight (kg): 0.285

Body Lenght: 39

Total Lenght: 63

Total Width: 42.3

Bolt Widht: 31 ±0,2

Meeting this requirements, more or less I found the follwing models:

* SY42STH38-1684A: Meets every requirement, but it's very expensive for my budget.

* 1703HS168A: Has a higher Inductance/Phase (20% mH) than the original specs, this is 3.6mH v/s 3.2 mH, and a superior Holding Torque  than the original specs 4.4 Kg-cm v/s 3.6 Kg-cm

* 42SHD0217-24B: Has a superior Rated Voltage (V) 3,75V v/s 2,8V, that comes from a inferior Rated Current (A) (1.5A v/s 1.68A) and superior Res. / Phase (10% Ohm) (2.5Ω v/s 1.65Ω); having also more Inductance/Phase (20% mH) (5mH), Holding Torque (N.cm) (5.0 Kg-cm), Detent Torque (N.cm) (152 gr-cm[?]) and Rotor Torque (N.cm²) (57 gm-cm2).

* 17HS4401: Couldn't fin every spec to compare, but it has a lower Rated Voltage (V) which is 2.55V, as a result of a slightly higher Rated Current (A) of 1.7A and a lower Resistance/Phase (10% Ohm) of 1.5 Ω. And also a superior Holding (4.0 Kg-cm) and Detent Torque (224 gr-cm[?]).

* OK42STH38-1684A: Meets every requirement, but I was not able to find which company produces this motor, therefore leaving me the impression that its quality is more dubious than all the previous ones. It seems also that is not extremely commons to find.

So my questions are:

a) Is it relevant that the Inductance/Phase and Holding Torque of the motor 1703HS168A is superior than the original specs from the UM Original? Does or should affect its speed, precision or performance? Will the board (Arduino MEGA Ultimaker Shield v1.5.7) be able to supply enough current to make the stepper motor function properly?

b) Is it relevant that the Rated Voltage (V) from the motor 42SHD0217-24B surpasses the original specs from the UM Original? And also, will the board (Arduino MEGA Ultimaker Shield v1.5.7) be able to supply enough current to make the stepper motor function properly?

c) Is it relevant for the motor 17HS4401 that the Rated Voltage (V) and Res. / Phase (10% Ohm) are inferior, but the Rated Current (A) superior to specs, and also, does or should affect its speed, precision or performance?

I tried to do the job to find out from myself which motor could be compatible, from the ones that do not meet every original spec requirement, but I do not think I found the answer yet, so therefore I am seeking for help here.

Cheers and thank you all!

Edited by Guest
  • Link to post
    Share on other sites

    Posted · Stepper Motors for Custom made Ultimaker Original

    I'm not a stepper expert. This is really not my expertise. I am an electrical engineer but specifications for these things is complex. I'm pretty sure any of those steppers would work. The 1.8 degrees is not critical (200 steps per rotation). You could do double or half that and all you really have to do is change the configuration.h file to setup the proper value for steps/mm. However if you have too many steps then you can't go as fast. With the current design the XY steppers can only go up to a little over 300mm/sec which is much faster than anyone would want to print at anyway. In other words arduino can put out up to exactly 40,000 steps per second and no faster.

    I wouldn't worry too much about voltage specs. Steppers are tough as hell. The current specification I would worry a bit - higher current implies more heating at the stepper driver and those can burn out. Although if you burn one out they are very cheap - around 10€ or $10 USD. But the steppers themselves should be fine. My steppers get very hot - sometimes around 70C, yet they work fine.

  • Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now
    • Our picks

      • UltiMaker Cura 5.3 stable released
        In this stable release, Cura 5.3 achieves yet another huge leap forward in 3D printing thanks to material interlocking! As well as introducing an expanded recommended print settings menu and lots of print quality improvements. Not to mention, a whole bunch of new printer profiles for non-UltiMaker printers!
          • Thanks
          • Like
        • 31 replies
      • Here it is. The new UltiMaker S7
        The UltiMaker S7 is built on the success of the UltiMaker S5 and its design decisions were heavily based on feedback from customers.
        So what’s new?
        The obvious change is the S7’s height. It now includes an integrated Air Manager. This filters the exhaust air of every print and also improves build temperature stability. To further enclose the build chamber the S7 only has one magnetically latched door.
        The build stack has also been completely redesigned. A PEI-coated flexible steel build plate makes a big difference to productivity. Not only do you not need tools to pop a printed part off. But we also don’t recommend using or adhesion structures for UltiMaker materials (except PC, because...it’s PC). Along with that, 4 pins and 25 magnets make it easy to replace the flex plate perfectly – even with one hand.
        The re-engineered print head has an inductive sensor which reduces noise when probing the build plate. This effectively makes it much harder to not achieve a perfect first layer, improving overall print success. We also reversed the front fan direction (fewer plastic hairs, less maintenance), made the print core door magnets stronger, and add a sensor that helps avoid flooding.

        The UltiMaker S7 also includes quality of life improvements:
        Reliable bed tilt compensation (no more thumbscrews) 2.4 and 5 GHz Wi-Fi A 1080p camera (mounted higher for a better view) Compatibility with 280+ Marketplace materials Compatibility with S5 project files (no reslicing needed) And a whole lot more  
        Curious to see the S7 in action?
        We’re hosting a free tech demo on February 7.
        It will be live and you can ask any questions to our CTO, Miguel Calvo.
        Register here for the Webinar
          • Like
        • 18 replies
      • UltiMaker Cura Alpha 🎄 Tree Support Spotlight 🎄
        Are you a fan of tree support, but dislike the removal process and the amount of filament it uses? Then we would like to invite you to try this special release of UltiMaker Cura. Brought to you by our special community contributor @thomasrahm
        We generated a special version of Cura 5.2 called 5.3.0 Alpha + Xmas. The only changes we introduced compared to UltiMaker Cura 5.2.1 are those which are needed for the new supports. So keep in mind, this is not a sneak peek for Cura 5.3 (there are some really cool new features coming up) but a spotlight release highlighting this new version of tree supports.  
          • Like
        • 22 replies
    • Create New...