Sariel Posted January 16, 2015 Posted January 16, 2015 The obvious disadvantage is that this thing takes two PF Servos, but I hope it can still be useful to someone: Building instructions: http://sariel.pl/downloads/ Quote
Renamed99 Posted January 16, 2015 Posted January 16, 2015 cool gearbox ,I wish i had 2 more servo motors for that gearbox :/ BTW few weeks ago I tried to build remote gearbox, I only managed to make remote for it, but I didn't have servo motors. I think that remote would be kinda cool with that gearbox http://www.eurobricks.com/forum/index.php?showtopic=104250&hl= Quote
nicjasno Posted January 16, 2015 Posted January 16, 2015 How does one solve accidentally putting both clutches into gear? A sequential shifting mechanism would be cool for rc models. Quote
Sariel Posted January 16, 2015 Author Posted January 16, 2015 (edited) A sequential shifting mechanism would be cool for rc models. Sure, but you know it would end up bigger than the gearbox itself. I'm sure some kind of sequential mechanism can be added for this design, I was just looking for minimum response time and reliability. I mean, I don't like to have to take a look at the gearbox to see what speed it's at and whether some ring is engaged or not. Here, I only have to look at the remote. Edited January 16, 2015 by Sariel Quote
Lucio Switch Posted January 16, 2015 Posted January 16, 2015 Sure, but you know it would end up bigger than the gearbox itself. I'm sure some kind of sequential mechanism can be added for this model, I was just looking for minimum response time and reliability. I mean, I don't like to have to take a look at the gearbox to see what speed it's at and whether some ring is engaged or not. Here, I only have to look at the remote. Do you think that is possibleto have, in a future, a profile on SBrick that merge the function of the two servos in one, so it could be more intuitive and it become almost impossible to engage two clutch at the same time? Quote
Sariel Posted January 16, 2015 Author Posted January 16, 2015 That should be reasonably easy to do. I wish they'll come out of alpha build on Android soon and start making things like that possible :) Quote
TJoling Posted January 16, 2015 Posted January 16, 2015 Don't you get a lot of additional friction since the servo cannot go to its final position and keeps on pushing the changeover catch into the driving ring? Quote
Alasdair Ryan Posted January 16, 2015 Posted January 16, 2015 I have seven servo's and counting,I could build three. To be honest though since not every one has two servos a design that just used one would have got you more merit. Quote
Blakbird Posted January 16, 2015 Posted January 16, 2015 Sure, but you know it would end up bigger than the gearbox itself. I'm sure some kind of sequential mechanism can be added for this design, I was just looking for minimum response time and reliability. I mean, I don't like to have to take a look at the gearbox to see what speed it's at and whether some ring is engaged or not. Here, I only have to look at the remote. Jurgen Krooshoop's latest Kenworth has a transmission that can go directly from any gear to any gear, and each can be commanded absolutely from the remote. It is really cool but takes up way more space than this. This is clever but the need to hold the remote to keep in gear would get annoying over time. This is one case in which return-to-center is not a good feature. The train remote solves it, but also makes it even harder to shift. Hmmm, I'll have to think about this.... Quote
PROlego Posted January 16, 2015 Posted January 16, 2015 Jurgen Krooshoop's latest Kenworth has a transmission that can go directly from any gear to any gear, and each can be commanded absolutely from the remote. It is really cool but takes up way more space than this. This is clever but the need to hold the remote to keep in gear would get annoying over time. This is one case in which return-to-center is not a good feature. The train remote solves it, but also makes it even harder to shift. Hmmm, I'll have to think about this.... Why not simply use old high friction pins connected to the remote lever to keep the gear selected? Quote
Blakbird Posted January 16, 2015 Posted January 16, 2015 Why not simply use old high friction pins connected to the remote lever to keep the gear selected? Even then you'd need a continuous line of sight. If the model moves our of site, even for a moment, you would lose your gear. The train remote command is persistent so you don't need to keep transmitting and using battery. This makes more sense for a gear selection. Quote
Sariel Posted January 17, 2015 Author Posted January 17, 2015 Don't you get a lot of additional friction since the servo cannot go to its final position and keeps on pushing the changeover catch into the driving ring? No, because it doesn't. If you watch the video closely, you'll see Servos rotate full 90 degrees forth and back, no pushing. Quote
wumsi Posted January 17, 2015 Posted January 17, 2015 I think something like Jurgen Krooshoops 4 Speed RC gearbox is a better solution, http://jurgenstechni...m/gearbox2.html You just have to figure out, how to make it much smaller. I played around with it, but never really got it small enough. :D Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.