pic: Shifting Drivetrain with Transmissions

[R.C.]

Originally Posted by compwiztobe

What's your experience with the 0.251 ream on the encoder bore? I've wondered how close of a fit we'll want, and we haven't tested anything yet. How easily can you insert and remove the encoder, and how well does it stay engaged with the shaft?

Aren,

We've done a .2505 - .2510 ream for the past few years. We have never had an issue, most of the time we've been able to slide in and out with little force. We used to just drill the hole but switched to a drill + reamer to get a nicer fit.

We use the S4 with a ball bearing so there is very little drag.

[MichaelBick]

Originally Posted by R.C.

Aren,

We've done a .2505 - .2510 ream for the past few years. We have never had an issue, most of the time we've been able to slide in and out with little force. We used to just drill the hole but switched to a drill + reamer to get a nicer fit.

We use the S4 with a ball bearing so there is very little drag.

We've also had success drilling the hole out with a regular 1/4" drill

[TikiTech]

Aloha!


Been away from the CD scene for a little bit. Turns out this thread is what our team has been working on for the off season.. So I thought it would be a good time to share it.

Transmission:
http://www.chiefdelphi.com/media/img...2202479c_l.jpg

Drivetrain:
http://www.chiefdelphi.com/media/img...40fec228_l.jpg

Here is our Tiki Tech Transmission and prototype drive frame.

The transmission plate is based on the awesome stuff from West Coast Products and Vex Pro.

This transmission is set up to run two motors on either side of the frame rail. We have designed this to use on our 2015 prototype drivetrain. It has enough clearance to go over our newly designed 1.5x3” chain and sprocket in tube frame. We have changed the mounting points to a much wider and easily accessible for quicker removal.

The system uses basically everything you get in a WCP 2 speed (DS) transmission. Plus one idler gear. Which is a duplicate gear of one that is already in the kit.

Great thing about it is that it uses any of the dog gear sets from WCP. Mix and match pinions as well, so you can get that speed ratio that suits your approach best. It is nice and compact at less than 3” (2.3 to be exact). With the pneumatics and encoder there is still lots of room in the center for use.. Battery centered is easily done!

It has an encoder mount as well. Which easily adapts to your preferred encoder.

Since this transmission plate uses WCP gears it is quite easy to setup. Just purchase their 2 speed transmission (or just the gears) and all that has to be done is turn down the input shafts to desired length (depending on if you are running the chain/belt in frame or not) and purchase the extra idler gear, input shaft and bearings. In fact when we turned down the input shafts, we just made one longer and let the one protrude past the bearing into the encode. That is how we discovered where to put the encoder mount it.. It can be done very easily with limited tools!

This new plate can be made as a solid plate or milled (as shown). Depending on your machining capabilities.

The second prototype has grooving along the outer edge for Lexan covers to keep fingers and debris out.

Questions or comments let me know, we love to hear what you think.
Enjoy!

[Oblarg]

Originally Posted by TikiTech

Aloha!


Been away from the CD scene for a little bit. Turns out this thread is what our team has been working on for the off season.. So I thought it would be a good time to share it.

Transmission:
http://www.chiefdelphi.com/media/img...2202479c_l.jpg

Drivetrain:
http://www.chiefdelphi.com/media/img...40fec228_l.jpg

Here is our Tiki Tech Transmission and prototype drive frame.

The transmission plate is based on the awesome stuff from West Coast Products and Vex Pro.

This transmission is set up to run two motors on either side of the frame rail. We have designed this to use on our 2015 prototype drivetrain. It has enough clearance to go over our newly designed 1.5x3” chain and sprocket in tube frame. We have changed the mounting points to a much wider and easily accessible for quicker removal.

The system uses basically everything you get in a WCP 2 speed (DS) transmission. Plus one idler gear. Which is a duplicate gear of one that is already in the kit.

Great thing about it is that it uses any of the dog gear sets from WCP. Mix and match pinions as well, so you can get that speed ratio that suits your approach best. It is nice and compact at less than 3” (2.3 to be exact). With the pneumatics and encoder there is still lots of room in the center for use.. Battery centered is easily done!

It has an encoder mount as well. Which easily adapts to your preferred encoder.

Since this transmission plate uses WCP gears it is quite easy to setup. Just purchase their 2 speed transmission (or just the gears) and all that has to be done is turn down the input shafts to desired length (depending on if you are running the chain/belt in frame or not) and purchase the extra idler gear, input shaft and bearings. In fact when we turned down the input shafts, we just made one longer and let the one protrude past the bearing into the encode. That is how we discovered where to put the encoder mount it.. It can be done very easily with limited tools!

This new plate can be made as a solid plate or milled (as shown). Depending on your machining capabilities.

The second prototype has grooving along the outer edge for Lexan covers to keep fingers and debris out.

Questions or comments let me know, we love to hear what you think.
Enjoy!

Looks like an awful lot of weight with that 4-gearbox setup - any particular motivation for that rather than a single 3-CIM gearbox?

[Jared]

Here's an updated version with HSMXpress toolpaths: https://drive.google.com/file/d/0Bzf...ew?usp=sharing

Pictures:
https://drive.google.com/folderview?...&usp=sha ring

Free speeds - 15.81 high, 7.38 low
JVN 81% speed loss - 12.81 high, 5.98 low
3.25" versa wheel

The cost for everything (without CIM motors or the pneumatic cylinder) comes out to $730, assuming big aluminum pieces for the frame come for a reasonably priced local place.

[asid61]

Originally Posted by Jared

Here's an updated version with HSMXpress toolpaths: https://drive.google.com/file/d/0Bzf...ew?usp=sharing

Pictures:
https://drive.google.com/folderview?...&usp=sha ring

Free speeds - 15.81 high, 7.38 low
JVN 81% speed loss - 12.81 high, 5.98 low
3.25" versa wheel

The cost for everything (without CIM motors or the pneumatic cylinder) comes out to $730, assuming big aluminum pieces for the frame come for a reasonably priced local place.

Those are some really good speeds for 4 cim. Hope it works out for you if you build it.