MKIII drive unit in Alpha test!

So if I have am Amp-Flow I just need to adjust the opening to accommodate the motor size? (Noob printer whose learning and being cautious.)

Paul Stre

Hi, they’re 3x7x3

Michael Baddeley

Hi there Are the omni tyres 3mm bearings 3*8*3? 16per foot?

Colin Nolan

make another YouTube video on the new set up..love your videos

William

Thanks Ray, the posts are because it's stronger, printing is like wood grain, so it does need the posts as is. Assembly order was, middle gear in first, then the post into the middle gear. This should be a tight fit on the bearings and smooth. Around 1-2mm off the Motor Bracket. Then the motor with the drive gear on, it wriggles in and tighten the clamps. I don't want to shorten the clamp as that bit does take most of the stress. I think the motor cover does need tweaking even so slightly though. The motor height needs adjusting so the gears are level with each other. Then the motor cover (this allows a little movement when putting the motor in). Finally the wheel gear and then post. two washers either side worked for me. I didn't combine the wheel and the gear for two reasons, firstly if this is run for a while and we get any wear / parts need replacing you don't need to reprint / replace the wheel and tyre, just the gear. Secondly it allows swapping of the gear for mods (like the recent chain / sprocket mod). I've also tweaked the omniwheel pins and bracket to align the the omniwheels with the drive wheel better and thickened the omniwheel pin. The bearings sit snug but I'm trying to remove as much play as possible to decrease noise. Hope all that makes sense.

Michael Baddeley

Sorry Martin, they’re in MKIII body - feet

Michael Baddeley

Where are the designs for the new drives in the folders? I'm in the WIP folder but cant see the files for these? Are they in the fusion 360 designs or somewhere else?

Looks like you started with the Mk2 and modified that. In doing so you made the motor mount fixed to the LMotorFrameB This of course does make it a lot stronger, but why not continue this with LPost1, LPost2 and LPost3? or is this so the print layers are in a different direction to gain more strength? When I tried to fit the MiddleGear, I found it very tight in getting the part into the LMotorFrameB. I was going to suggest that the motor band clamp be shortened by 5mm on the gear end to make it easier to fit the middle gear. The same mod would also make it easier to fit LMotorBracketCover. The above mod would add to the support but would make it easier to assemble Is there any reason why WheelGear and LWheel can't be combined? It would result in support being required between the Wheel and the gear, but it would be stronger. I'm still in the process of printing, but the parts I have sliced up look to be a great improvement in the top frame area. I've printed out the GearboxPin and it fits well. I have also printed out the WheelPin. This part is creating some confusion as to how to fit it. I assumed the hex part is meant to fit into the LMotorFrameB, however this does make it very difficult to install the wheel and gear assembly with the herringbone gear. I haven't yet printed LSideFrameA and am wondering if the WheelPin should be changed to insert from the L-Side Frame side. That way the gear can be put into place and then the pin installed to hold it in place, or have I got the order of assembly wrong and the wheel gets pined first then the MiddleGear, hoever the LMotorBracketCover would be under the wheel making it difficult to fit. FYI the settings I am using: Printing PLA, Bed 50, Hotend 205. 0.2 layer height for the frame and 1.2 for the gears (I prefer quality over time) Speed is 3500.0 mm/min and 50% infill Printing on Glass with glue stick using a Cocoon Create Touch Printing continues and I think is looks very good so far, I will have to take some photos of the parts and of the assembly process.

Ray Edgley

Hi Ray, certainly please do, that’s what Apha is about. At the moment I’ve changed the motor band holder on the frame (I cut it originally to reduce support but it’ll be strong with the update), want to improve the tolerance on the pins, particularly the omniwheels which are looser than I’d like.

Michael Baddeley

Hello Michael, With this being an Alpha, do you want some feedback on the build of this assembly? I have started printing and have found where a couple of tweaks could make assembly easier. This of course will mean reprinting, but that what the Alpha versions are all about :-)

Ray Edgley

Is there a list of the bearings used in the new geared version? Printer is currently working on LMotorFrameB.stl and I have all the left side gears printed. I can't wait to give this a try in my R2D2.

Ray Edgley

Sorry No found it turns out I am just a numpty. well my wife certainly knew but now proved to others too. :(

Craig oakeshott

I cant see the files on the drive as I am only a $5 member is this not available to me?

Craig oakeshott

E90 or E100 razor motor

Michael Baddeley

noob question... what motors are those ??

I’ve not mirrored it yet, will be on the folder later this week.

Michael Baddeley

There is only files in drive A folder, does that have the files for both feet? There is a folder Drive B, but it is empty.