MadModder

Okay engineers, back on engines! Not a big part, but progress none-the--less. A new connecting rod, this time with a ball bearing pressed into the big end.

If you could call it big. It's a 3mm bearing. I will have to re-pin the flywheel, since the former bearing was 1/8". I don't have any 3mm rod, so I'll have to turn down some 1/8". Well maybe grind it down with the lathe's milling attachment.

 

More parts arrived today, the 60-70mm drive shafts showed up.  I DO believe that they will work for the drive shafts from the transfer case to the front and center axles.  According to the tracking info, the Lesu axles should be here on Saturday - we'll see if they'll work out then.  I still have to modify the drive pins for the drive shafts.  I need to turn the pins down from 3mm to 2mm.  I'll need to make bushings to support the unthreaded end of the drive pins in the drive shaft knuckles since those holes are currently 3mm.I'll also need to make bushings for the transfer case end of both the drive shafts, which needs 4mm bores but currently have 5mm bores.  I'll probably have to modify the drive pins, and make bushings for the the Lesu drive shafts too. 

Pretty soon I'm going to have to quit thinking of this as a generic design project. and make it an actual Work In Progress.  We are getting dangerously close to the point where this work will only be applicable to one truck.

Thanks Joules, Muzzerboy. 

Joules, crude oil I don't have, but maybe you mean waste oil? Muzzer, I did look at that search but most didn't seem applicable to high heat, and/or were cost prohibitive. I was hoping for an inexpensive DIY process.

I did see one fairly reasonable product, but no idea if it will withstand high heat Ni-black 40 was the name. And nope I haven't tried any products yet.

This is the next bit which apart from holding lathe tools etc will hopefully help me make the accurate 40 degree taper in the end of the spindle.

I added a 9 V power supply for the arduino. Upshot of testing this afternoon: motors and gantry all work, but two of the stepper drivers are bad. 

Time to order new ones. Presently the system has a 24V power supply w/ 8.3 amp output. The drivers are set at 2.7 amps each, 8 microsteps on 200 steps/rev nominal. So I have to find drivers that fit those specs.