How can I assemble 2 opposing gears so that the axle rotations are perfectly parallel?












2














Due to the way all the modern LEGO gears are perfectly quarter-turn symmetrical, there doesn't appear to be any way to assembly 2 opposing gears such that I get a 2 perfectly parallel axles.



This image illustrates the problem:



enter image description here



When one gear it perfectly centered, the other gear is rotated half a tooth.



How can I get 2 opposing gear's axles to be perfectly parallel? Are there any older or special gears that are useful here? Otherwise, are there any good workarounds?






technic building gears







share|improve this question




















  • 1




    Do you have any restrictions on the maximum distance of the gears or similar?
    – Wrzlprmft
    4 hours ago










  • @Wrzlprmft No necessarily, just that they turn in opposite directions.
    – Alexander O'Mara
    4 hours ago
















2














Due to the way all the modern LEGO gears are perfectly quarter-turn symmetrical, there doesn't appear to be any way to assembly 2 opposing gears such that I get a 2 perfectly parallel axles.



This image illustrates the problem:



enter image description here



When one gear it perfectly centered, the other gear is rotated half a tooth.



How can I get 2 opposing gear's axles to be perfectly parallel? Are there any older or special gears that are useful here? Otherwise, are there any good workarounds?






technic building gears







share|improve this question




















  • 1




    Do you have any restrictions on the maximum distance of the gears or similar?
    – Wrzlprmft
    4 hours ago










  • @Wrzlprmft No necessarily, just that they turn in opposite directions.
    – Alexander O'Mara
    4 hours ago














2












2








2







Due to the way all the modern LEGO gears are perfectly quarter-turn symmetrical, there doesn't appear to be any way to assembly 2 opposing gears such that I get a 2 perfectly parallel axles.



This image illustrates the problem:



enter image description here



When one gear it perfectly centered, the other gear is rotated half a tooth.



How can I get 2 opposing gear's axles to be perfectly parallel? Are there any older or special gears that are useful here? Otherwise, are there any good workarounds?






technic building gears







share|improve this question















Due to the way all the modern LEGO gears are perfectly quarter-turn symmetrical, there doesn't appear to be any way to assembly 2 opposing gears such that I get a 2 perfectly parallel axles.



This image illustrates the problem:



enter image description here



When one gear it perfectly centered, the other gear is rotated half a tooth.



How can I get 2 opposing gear's axles to be perfectly parallel? Are there any older or special gears that are useful here? Otherwise, are there any good workarounds?






technic building gears




technic building gears






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited 4 hours ago

























asked 4 hours ago









Alexander O'Mara

6,69021245




6,69021245








  • 1




    Do you have any restrictions on the maximum distance of the gears or similar?
    – Wrzlprmft
    4 hours ago










  • @Wrzlprmft No necessarily, just that they turn in opposite directions.
    – Alexander O'Mara
    4 hours ago














  • 1




    Do you have any restrictions on the maximum distance of the gears or similar?
    – Wrzlprmft
    4 hours ago










  • @Wrzlprmft No necessarily, just that they turn in opposite directions.
    – Alexander O'Mara
    4 hours ago








1




1




Do you have any restrictions on the maximum distance of the gears or similar?
– Wrzlprmft
4 hours ago




Do you have any restrictions on the maximum distance of the gears or similar?
– Wrzlprmft
4 hours ago












@Wrzlprmft No necessarily, just that they turn in opposite directions.
– Alexander O'Mara
4 hours ago




@Wrzlprmft No necessarily, just that they turn in opposite directions.
– Alexander O'Mara
4 hours ago










2 Answers
2






active

oldest

votes


















1














If you use a crown gear or bevel gear to connect your gears twice perpendicularly, they are exactly opposing each other, turn in opposite directions, and are parallel (if the respective axle is aligned to the coordinate system of the construction). Like with all gear-to-gear connections, you have a little wiggle room that may exceed half a tooth.



illustration of construction



If you want the opposing gears next to each other, you can use further gears attached to these (coming with yet more wiggle room).






share|improve this answer





























    0














    You could use a belt system to get a perfect, parallel rotation. The chain links used in this video are #3711 and the gears appear to be the same as the ones shown in your example.



    enter image description here



    There doesn't seem to be an easy way to get the gears to turn in opposite directions without the use of gears (without that half tooth lag).



    Two high friction, Technic rubber wheels, placed directly against each other will rotate almost perfectly. Although they might de-synchronise after many revolutions.






    share|improve this answer





















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      2 Answers
      2






      active

      oldest

      votes








      2 Answers
      2






      active

      oldest

      votes









      active

      oldest

      votes






      active

      oldest

      votes









      1














      If you use a crown gear or bevel gear to connect your gears twice perpendicularly, they are exactly opposing each other, turn in opposite directions, and are parallel (if the respective axle is aligned to the coordinate system of the construction). Like with all gear-to-gear connections, you have a little wiggle room that may exceed half a tooth.



      illustration of construction



      If you want the opposing gears next to each other, you can use further gears attached to these (coming with yet more wiggle room).






      share|improve this answer


























        1














        If you use a crown gear or bevel gear to connect your gears twice perpendicularly, they are exactly opposing each other, turn in opposite directions, and are parallel (if the respective axle is aligned to the coordinate system of the construction). Like with all gear-to-gear connections, you have a little wiggle room that may exceed half a tooth.



        illustration of construction



        If you want the opposing gears next to each other, you can use further gears attached to these (coming with yet more wiggle room).






        share|improve this answer
























          1












          1








          1






          If you use a crown gear or bevel gear to connect your gears twice perpendicularly, they are exactly opposing each other, turn in opposite directions, and are parallel (if the respective axle is aligned to the coordinate system of the construction). Like with all gear-to-gear connections, you have a little wiggle room that may exceed half a tooth.



          illustration of construction



          If you want the opposing gears next to each other, you can use further gears attached to these (coming with yet more wiggle room).






          share|improve this answer












          If you use a crown gear or bevel gear to connect your gears twice perpendicularly, they are exactly opposing each other, turn in opposite directions, and are parallel (if the respective axle is aligned to the coordinate system of the construction). Like with all gear-to-gear connections, you have a little wiggle room that may exceed half a tooth.



          illustration of construction



          If you want the opposing gears next to each other, you can use further gears attached to these (coming with yet more wiggle room).







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered 3 hours ago









          Wrzlprmft

          1,459525




          1,459525























              0














              You could use a belt system to get a perfect, parallel rotation. The chain links used in this video are #3711 and the gears appear to be the same as the ones shown in your example.



              enter image description here



              There doesn't seem to be an easy way to get the gears to turn in opposite directions without the use of gears (without that half tooth lag).



              Two high friction, Technic rubber wheels, placed directly against each other will rotate almost perfectly. Although they might de-synchronise after many revolutions.






              share|improve this answer


























                0














                You could use a belt system to get a perfect, parallel rotation. The chain links used in this video are #3711 and the gears appear to be the same as the ones shown in your example.



                enter image description here



                There doesn't seem to be an easy way to get the gears to turn in opposite directions without the use of gears (without that half tooth lag).



                Two high friction, Technic rubber wheels, placed directly against each other will rotate almost perfectly. Although they might de-synchronise after many revolutions.






                share|improve this answer
























                  0












                  0








                  0






                  You could use a belt system to get a perfect, parallel rotation. The chain links used in this video are #3711 and the gears appear to be the same as the ones shown in your example.



                  enter image description here



                  There doesn't seem to be an easy way to get the gears to turn in opposite directions without the use of gears (without that half tooth lag).



                  Two high friction, Technic rubber wheels, placed directly against each other will rotate almost perfectly. Although they might de-synchronise after many revolutions.






                  share|improve this answer












                  You could use a belt system to get a perfect, parallel rotation. The chain links used in this video are #3711 and the gears appear to be the same as the ones shown in your example.



                  enter image description here



                  There doesn't seem to be an easy way to get the gears to turn in opposite directions without the use of gears (without that half tooth lag).



                  Two high friction, Technic rubber wheels, placed directly against each other will rotate almost perfectly. Although they might de-synchronise after many revolutions.







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered 21 mins ago









                  Ambo100♦

                  12.6k547131




                  12.6k547131






























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