1. Do not share user accounts! Any account that is shared by another person will be blocked and closed. This means: we will close not only the account that is shared, but also the main account of the user who uses another person's account. We have the ability to detect account sharing, so please do not try to cheat the system. This action will take place on 04/18/2023. Read all forum rules.
    Dismiss Notice
  2. For downloading SimTools plugins you need a Download Package. Get it with virtual coins that you receive for forum activity or Buy Download Package - We have a zero Spam tolerance so read our forum rules first.

    Buy Now a Download Plan!
  3. Do not try to cheat our system and do not post an unnecessary amount of useless posts only to earn credits here. We have a zero spam tolerance policy and this will cause a ban of your user account. Otherwise we wish you a pleasant stay here! Read the forum rules
  4. We have a few rules which you need to read and accept before posting anything here! Following these rules will keep the forum clean and your stay pleasant. Do not follow these rules can lead to permanent exclusion from this website: Read the forum rules.
    Are you a company? Read our company rules
Shared accounts will be removed Plugin Downloads Zero spam policy Forum Rules

Help - AVR micro ATMega 8535 - Can't get motors to move

Discussion in 'Motor actuators and drivers' started by HAVOG, Jan 6, 2009.

Page 2 of 2
  1. HAVOG

    HAVOG New Member

    Joined:
    Jan 2, 2009
    Messages:
    34
    Occupation:
    High and Low voltage technician, production automa
    Location:
    Denmark
    Balance:
    299Coins
    Ratings:
    +0 / 0 / -0
    Hi

    Think I got the whole thing working now - I think/hope.

    I changed one of the IRFZ44 MOSFET which seemed to be burned.




    Henrik
    HAVOG, Jan 7, 2009
    #21
  2. egoexpress

    egoexpress Active Member

    Joined:
    Dec 13, 2006
    Messages:
    3,839
    Location:
    Germany - Frankfurt/M
    Balance:
    421Coins
    Ratings:
    +10 / 1 / -0
    An additional video that shows the motors working properly, would be nice.

    Regards
    Christian
    egoexpress, Jan 9, 2009
    #22
  3. HAVOG

    HAVOG New Member

    Joined:
    Jan 2, 2009
    Messages:
    34
    Occupation:
    High and Low voltage technician, production automa
    Location:
    Denmark
    Balance:
    299Coins
    Ratings:
    +0 / 0 / -0
    Hi..

    It doesn't work properly though. It has no torque or speed.

    But I tried testing it like Thanos said:

    1. Connect the PWM1 line to +5v
    2. Connect the M1IN1 to +5v and M1IN2 to Gnd, to see the motor rotate in one direction.
    3. Disconnect the M1IN1 from the +5v
    4. Connect the M1IN2 to +5v and M1IN1 to Gnd, to see the motor rotate to the other direction.

    You can perform the above test with no motors mounted, and just watch the status LEDS light one at a time.
    And you can try it on the second half of the DSMhb1.2 by using the rest of the ports (PWM2, M2IN1, M2IN2)
    The 74HC08 chip is powered from the signal cable (from AMC1.5 for example), not from the motor power source!!!! To be able to do the above tests you need to feed it with +5v also!!!

    It workes fine both ways until one of my mosfets xploded and bursted into flames with a bang.. I'll put in a new..

    So maybe it's my AVR controller that doesn't give the right signal to the H-bridge.

    Henrik
    HAVOG, Jan 23, 2009
    #23
  4. tronicgr

    tronicgr

    Balance:
    Coins
    Ratings:
    +0 / 0 / -0
    You did that tests with a motor connected???? Wow!!

    This test is meant to be done with motor unconnected, just to observe the status leds turning on-off ok... The 100% switch ON of the motor may cause very large peak current to the motor even unloaded...!!

    :eek:


    Regards, Thanos
    tronicgr, Jan 23, 2009
    #24
  5. HAVOG

    HAVOG New Member

    Joined:
    Jan 2, 2009
    Messages:
    34
    Occupation:
    High and Low voltage technician, production automa
    Location:
    Denmark
    Balance:
    299Coins
    Ratings:
    +0 / 0 / -0
    Hi

    Hehe.. ya.. I did it with both motors connected - both ways. I only did it a short while. But as you can see - one of the mosfets xploded :)
    But now i know the H-bridge works...

    Henrik
    HAVOG, Jan 23, 2009
    #25
  6. RaceRay

    RaceRay Administrator Staff Member SimAxe Beta Tester

    Joined:
    Nov 8, 2006
    Messages:
    4,656
    Occupation:
    Self-employed | Web and application development
    Location:
    Hamburg, Germany
    Balance:
    23,864Coins
    Ratings:
    +2,007 / 13 / -0
    My Motion Simulator:
    2DOF, DC motor, SimAxe, SimforceGT
    And now you see how much power is in there. Next time i wanna see a video of your exploding mfets :D

    Keep the good work going on.

    regards, René
    RaceRay, Jan 27, 2009
    #26
Page 2 of 2