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Thread: Deathly Hallows - FW - Alligrater

  1. #51

  2. #52
    I am not 100% sure.

    The power is down.
    The Feathertwo is making a tone when operating the motors (I think sound is coming from the ESC)
    It moves forward and back but not turning when on the ground, but works properly when on stand.

    I have 3 fuses all at moment under sized for testing and none are blowing. A battery fuse 30A, a ESC/motor fuse 30A and a lineac fuse 15A.

    Very odd. I sent a PM to Rapid Rory

    Two thoughts:
    My shockingly bad soldering (the kill switch was getting very hot)
    The RX is sending bad signals to the ESC

  3. #53

  4. #54
    Quote Originally Posted by PaulusSmallus View Post
    Is the kill switch getting hot when you try to move it on the ground, or are you meaning it got hot when you soldered to it?
    Do you have a multimeter?
    It gets hot when running. Actually smoked.
    It's a anti-spark XT90 with awg10 wire across the pins.

    Yes I have multimeter

  5. #55
    Found first issue. A connection in the XT90 kill switch was not sound so could only carry so much power before it maxed out. On the ground the motors pulled more current so they stalled.

    There is still a tone from somewhere. I think the ESC but seems ok.

    Running up the motors at higher speeds the chain jumped. I need to fit a tensioner, I thought I may need to. I have some ideas.

    Also played with the trim. Not really sure what I am doing here but moving channel 1 to the right of centre seems to have aligned the drives a bit better. Once the chain tensioners are fitted I'll give test it on the ground.

    Still need to fit the wedge ramp too

  6. #56
    Ocracoke's Avatar
    Team Kaizen

    There is still a tone from somewhere. I think the ESC but seems ok.
    I has this issue on my FeatherTwo, it is the trims that need setting on the controller. My axe on The Honey Badger 2 used to provide a little bit of power in reverse so adjusting trims made it stop making that noise.
    Team Kaizen - Build Diary for all the robots

    AW: Amai, Ikari, Lafiel, Osu, Ramu
    BW: Shu!, The Honey Badger
    FW: Azriel
    MW: Jibril, Kaizen

  7. #57
    Fitted some tensioners. I had ordered some track bike tensioners in case.

    IMG_20180617_193903.jpg

    These worked really well! So I thought I'd give it fill power on the stand.
    WhirrrrrrrrrrrrrrrrrRRRRRR
    CLUNK!

    Chain off on the other side. But how? So much tension?

    I could see the chain had hit the frame.
    IMG_20180617_193921.jpg

    But the gear should not be that far over. Time for a total disassembly

    Initially I thought the bolt had sheered off.
    IMG_20180617_194920.jpg

    But no. I'd only used regular nuts when I didn't just build up, planning to swap them out for locking nuts before finishing and I'd forgotten.

    But with the whole front, body, wheels out no video today.

    But I'll take the chance to make some improvements and lose some weight.
    Drilling the wheels
    Drilling the floor
    Cutting a piece out the floor
    Widening the wheel slots
    Swapping out nuts for locking nuts
    Tightening up

    Need to get this done fast as I have not yet tested the lifting arm.

  8. #58
    Today I stripped it right back.
    I cut a 12mm strip off the front and sides leaving some pieces as a ledge for the HDPE armour.
    Widened the wheel slots a bit,not much weight saved there.
    Also drilled a heap of 10mm holes in the base and some 50mm holes in the HDPE sides and back.

    I also cross drilled all the rubber of the wheels but to be honest I saved very littleweight. I think the weight is in the hub.
    While I had the wheels out I checked the fitting and replaced those pesky nuts with locking nuts.
    Refitting the wheels on the axles took about of work but I am happier in their location,and the clamps are tighter to stop movement when rotating

    Swapped out the motor retaining nuts for locking nuts.
    Tightened everything else up.

    I should have shed perhaps 200g. Fingers crossed.

    Refitting it all back together now. Fitted some of the pond filter foam around the electronics, and under the battery. Tidying up some of the cabling.

    Tomorrow I want to refit the shell,and test everything still works.before bolting it all in place again. Then it's fitting on the front armour and building and fitting the ramp, including the self-righteous mechanism, and sides.

    I could do with a day off work.

  9. #59
    Having a total nightmare!

    No matter what I try with the tensioner the chain is jumping. Tried shortening chain and it would be too short.

    Tried the tensioner lifting from below today. Same problem.

    Spent hours today on this, beginning to think I may need to try something completely different.

    It's a shame as I received the Grantham email I citation today too

    Anyway no time to write more. Back to the Robot Shed for me

  10. #60
    Ocracoke's Avatar
    Team Kaizen

    I can only think of either the chain being out of alignment or a bent tooth on one of the sprockets.
    Team Kaizen - Build Diary for all the robots

    AW: Amai, Ikari, Lafiel, Osu, Ramu
    BW: Shu!, The Honey Badger
    FW: Azriel
    MW: Jibril, Kaizen

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