fischertechnik community forum

Extra parts for the Fischertechnik marble track. Many extra parts are printed in 3D. Especially the magnet holder for the chain is useful. There is a special holder made for the start of the ball track on the chain. This holder has the right inclinations, shape and is provided for a braking zone for...

Absolutely fantastic, this will keep my printer busy for weeks, thank you, Frans! Peter This looks very professional. Excellent work! Thanks everyone. I have printed many hours of 3D printing, more than 150, for all the tests. Many details have been worked out, many chamfers have been optimized. Me...

Hi! Could it be there is a tiny error in this straight rail ? It seems maybe you forgot to chamfer one of the edges. Yes you are right, one has been forgotten! I'm going to see for an update. Those chamfers are mainly to prevent the outside from folding too much. Update: I changed the file and uplo...

MasterOfGizmo hat geschrieben:Great!

Stupid question: If these aren't supposed to be bent. Why didn't you make them solid? Wouldn't that make them more robust and easier to print?

They still need to be able to bend because they need to be adjusted in height. The slope can be adjusted this way.

The original flex rails are only available in 2 sizes. By making multiple lengths via 3D printing you have a lot of possibilities for building the ball track. Bending the original flex rails is not always easy. That's why I made several circular versions here. They are available in 90, 180 and 270 d...

Thanks Stefan, I've tested it now and it's going pretty well. That's easier. However, the amount of backlash depends a little on the position of both nuts. Best suited for normal use. The 3D block is slightly more robust as a whole. Well, there are still some other blocks left, like the worm stop an...

Designing a backlash-free drive with a worm screw. To eliminate the backlash, 2 worm screws are required that have a small shift. With only 1 worm screw you have about 0.6mm of backlash which is a lot. A custom housing now contains 2 worm screws at the right distance. These can easily be mounted on ...

bbq-master hat geschrieben: @Franz
Which side is ideally on the print bed when printing? Then I remove here the edge rounding.

I always place the smallest diameter at the bottom. This way the surface on the print table is the largest and no post-processing is required.

Frans.

On the Onedrive directory you will find 4 different stl files. Plug completely left and right Plug halved left and right I've set the hole for the dwarf plug down by 0.3 and broken the edges with a radius. In the split I have a ball attached for guidance. I reloaded the files and printed the right ...

Yes, I have not yet planned the lateral connections. I first wanted to see if the plug can work at all. I have only the Fischertechnik 3D printer available, I doubt that this can print the small holes problem-free. So thank you for your experiences Tomorrow I get the alternative plug. The plugs sho...

Ich hab die Bohrungen 0,4 - 0,5mm größer erstellt. Eine Variante komplett, mit aushebenut I had 0.2mm clearance, your value from 0.4 to 0.5 will be even better. I didn't understand the term "aushebenut" at first, now I see what you mean by looking at the .stl files. That's a good idea! "Conrad" has...

@Frans, This, again, is a very elaborated and full-featured solution! What specific NEMA 17 stepper did you use? I think this info should be added, as they come in different heights. I started construction on my NEMA 17 enclosure concurrently and recently published it (see above). I find that I pre...

PHabermehl hat geschrieben:Frans, that's probably the best thing you could do, thanks.

I just ordered 50 pieces, to be delivered early next week. As soon as they are delivered I give the results.

Frans.

the nominal diameter of the ft pins is also 2.6mm and the connectors indicated by sven and me have been used for ft since ever. They were originally used for model railroads first. ft did not make their own pins, they just made the rectangular housing instead of the cylindrical. I just measured the...

Hi Frans, Have you done any changes in the dimension to print it? René Hi René, I made a drawing myself with Autodesk fusion 360 and it is a bit different from your version. I measured all sizes of the FT plugs. I also made holes to plug in the original connectors on the left side. You didn't put t...

Hi Björn, Yes that's right, I should have connected it to the picture like that. An option could also be to just put the necessary pins in the adapter that you need for your project at that moment. That would not increase the number of pins needed. If you have some devices that already have FT pins ...

I just wanted to test if this was feasible. The assembly is going very well. I used the original connection pins from FT. They fit perfectly in the adaptor. If you put all 17 pins in, the total resistance of the plug is quite high. With a bit of KONTAKT61 on the contacts it's a lot easier to push in...

I made 3 different models. The gears are drawn with Autodesk fusion 360. I use the add-in function to create correct gear profiles. The gear pressure angle is 20°. I use a backlash of 0.1mm, this because during 3D printing the dimensions are always a bit larger. All sizes are drawn and tested for th...

This nema17 stepper motor housing is designed for Fischertechnik blocks. It also includes connectors for the motor wires and an additional 3pin connector for a hall reference point detection. This makes the connection of this Nema17 motor easier. The extra hall detector can be used to set a zero poi...

I should also use this type of trackball. It looks very nice for the grandchildren. Basic version is expensive, but since you can make things yourself via 3D prints, it becomes interesting. Well done!
Much can be achieved together with the Fischertechnik combination.

Frans.