V8 heatsinks/jumpers?

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  • #4653
    mcgyvr
    Member

    Does the V8 board not need heatsinks anymore? (just got one in the mail today and it didn’t include them like the V7 board did..)

    Also does the 3 pin fan header need a jumper installed? I’m gonna run a 12V fan off it.. same jumper settings as the V7 or different?

    #4654
    Riley
    Keymaster

    No we are no longer selling / including them. They were not needed.

    TinyGv8.diagram

    That is the diagram that will give you the jumper configs. Be sure to notice IN = INPUT voltage.

    12v is fine but you will get much better performance out of 24v hands down.

    #4656
    mcgyvr
    Member

    Thanks Riley..
    I do have a 24V main supply.. just using a 12V fan with it..

    Hopefully this V8 board is more “noise immune” than the v7 board..
    I finally gave up on the V7 board and ordered this V8 one to replace it.
    My machine literally looked like this http://www.cnccookbook.com/img/OthersProjects/NoiseProof.jpg and it was still skipping g-code lines every now and then..

    #4657
    Riley
    Keymaster

    Werid. I run my v7 fine still. I had some real problems with this horrible Chinese spindle.. tossed it on a UPS and it worked fine.

    Have you hooked up a scope to your power? Skipping lines is not really a sign of noise. Noise is going to lock up your USB port completely 🙂

    Riley

    #4660
    mcgyvr
    Member

    Any other reasons you can think of that would cause skipped gcode lines?
    It seems fairly random.. Sometimes it will run though the code 5-10 times just fine then all of a sudden BOOM..
    It happens with tgfx and Matts Tinyg Console app. I can’t remember if it happens with coolterm though..

    What about “vibration” or movement in the USB connection? (I’m hoping the better USB connection on the V8 board will stop that if it was a problem)..I just don’t know what would happen if the USB cable was temporarily loose/disconnected for a fraction of a second.

    I have scoped the input power and haven’t seen anything out of the ordinary but I don’t have logging functions on my old tektronix so its almost impossible to constantly be monitoring the scope and running the machine with hand on the estop button.

    It literally just skips a line or 2 and then goes back to running just fine.

    Then I’ve also had it just go into a “full speed” ram into the limit switches where it seems to just loose its mind completely and not just miss a line and continue on.. And by full speed I mean it starts moving way faster than any max velocity setting I have it set for.

    Those are my problems..
    I should have the V8 board installed in the next day or 2 and will see if it happens again.. I’ll probably update the firmware to dev or edge too along the way.

    • This reply was modified 11 years, 1 month ago by mcgyvr.
    #4702
    Makerboost
    Member

    I’ve got a v8 board and I’ve had lots of problems with noise.
    I realized that it was mostly stuff I could fix like shielding and keeping signal cables away from stepper motor/cables and spindle cable. Put some ferrite cores on most of the wires.
    Now I’ve run problem free for a few days when I before couldn’t even run a single job without random stops.

    I had an issue where the TinyG would skip or make arcs very tiny, and then just traverse to the next point causing it to dig into the material at high speeds.
    I flashed it with the newest firmware, and now it runs fine again.

    #4703
    mcgyvr
    Member

    which firmware version exactly are you running?

    #4737
    Riley
    Keymaster

    Makerboost,

    That arc thing you described was a bug. Its been fixed in 380.08. Depending on when you read this… 380.08 is in edge or has already been promoted to master.

    mcgyvr,

    Please to not update to dev. all bets are off. Quite a bit of the time its set to move on reset to test out different things in code. Its quite dangerous to do so. We also pulled the tinyg.hex file from dev to make this a bit more difficult to accidently do 🙂

    Riley

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