Mini FPV-Rover Remix

thingiverse

I remixed some of the parts to the Mini FPV rover created by markus_p ...I was having problems getting the tracks to fit so i made the track frames where the front cog can be slid forward or backward at any time needed simply by loosing a M3 bolt that goes thru the center of the cog..I used the remixed tracks from Oleg_Menshikov and adjusted them to fit the cogs i remixed as well as added bevels to the insides so the tracks wont try to run out on the cogs..Only other part needed is a M3 socket head bolt and matching nut, preferably a non-locking nut.. Print the frames at .16 res i used a .4 nozzle ..The tracks print much better at .12 and kind of slow ..The COG also at .16 and the slider shaft as well.. To assemble evenly press the 2 bearings in the front cog then push the slider in the them also space it evenly, they fit snug and should not slip once in place then the cog simply goes in the front with the M3 bolt through the middle of the slider..The rear cog assembles the same as the original rover but u can't use the original cog cause it will be to shot i had to add 1mm thichness to the outside frame to get the front cog assembly to fit ..Of coarse you have to print 2 of everything to do both sides... The head of the bolt and nut i counter sunk to hide a bit and to also hold the nut from spinning when adjusting the tension.. I used Tinkercad for all the remixing i did cause i don't have other software at the moment to use..This is the first remix i have done and i must say it took me a while and was a great learning experience..I will try to add more photos when i get time, please feel free to comment or make any suggestions ... Enjoy!! Update: I added .1mm to the outer track frame cause the slider was a little tight.. Going to replace the rear and front cogs soon to much better fitting ones to the tracks plus the rear cog is going to have a solid shaft thru it which will need to drilled with a 3mm bit..Best on a drill press for a nice and straight hole, the reason is to stop the motor from wobbling ..drill a small hole in one end and use a set screw on the flat spot on the motor shaft. Going to try to get it to press fit in the back cog but if not it can be crazy glused once it is centered up...Will update soon.. Added new cogs and the split slider for the front cog ...it's a bit tricky but thus far hardly any wobble on the motor..Had to shave down the set screw to clear the bearing and just snug it to the flat spot on the motor shaft then back off a tiny bit that way you can insert and remove the motor as needed..I used my bench top drill press to push in the rear insert into the rear cog also to press in the front bearing in the front cog..Used a flat round dremel grinding stone as the tool to press in..Possibly more updates coming Print the rear cog insert at 100% infill and 0.12 quality cause it needs to be drilled with a 3mm bit Took out the counter sunk on the outside track frame the bolt is crushing the filament cause its to thin Update: got everything working the rear cog shaft needs to be drilled out with a 3mm bit the best way surprisingly i found is to drill it by hand with a pin vice ect..then drill a hole across for the 3mm grub screw carefully! You may need to shorten the grub screw a little to keep it from snagging on the bearing, i used a dremel cut off wheel ...put the shaft on the motor then snug up the grub screw then barely back it off that way the motor will slid in and out....Press the rear shaft into the rear cog and glue with crazy glue make sure it is straight before you glue it..If you line up everything carefully the tracks run really smooth.. I will include a optional rear shaft with holes printed for the grub screw but i couldn't get them to work without the dreaded wobble i didn't try drilling them by hand perhaps that will work if i try i will update...Theres a hole on each end but only one is used.. Update 2-13-2019 I added files so you can add the slider to the original design it simply moves one bearing to inside the front cog and adds a front shaft going thru the bearing..Then the bearing holes in the track frames are replaced with inserts with slots to allow the front assembly to slide forward and backward..Just glue to inserts where the bearings were then trim out the thin layer on the outer track frame to match the oval slide slot it's thin and easily trims out with an exacto knife ect just be careful ...The cog and shaft are made so the bearing fits tight i used a drill press to press them together if they become loose carefully glue the bearing inside the cog and the glue the shaft to the center of the bearing...The files needed to add the slider to the original design start with "add on" Print 1 cog 1 shaft and 2 slider inserts per side for the add on version.. 3-6-2019 Added Motor Clip File..