jdcuervo

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  • in reply to: help with steppers #7745
    jdcuervo
    Member

    Hi!

    Problem solved.
    Related to cables and connectors. wired up everything again and now is working pretty good, just calibration issues and “mechanical” sounds that can be solved.

    This is what i think i did wrong:
    1- mix two different sizes of cables, awg 20 and 22, never thought it could be a problem.
    2- used cheap plastic connectors
    3- used an epoxic compound to glue all terminals, seems this was somehow interfering with performance of tinyG.

    What i’m using now:
    1- double shielded awg 20, same as all my motors.
    2- 4-pin aviator type connectors.
    3- i put a piece of plastic between tinyG and casing box, so is isolated.

    Thanks for all your help.
    Hope me mistakes can help somebody with same problem.

    John Cuervo

    in reply to: help with steppers #7736
    jdcuervo
    Member

    I agree with you about connection issues, what i’m going to do right now is to change all my wires, i found a nice 4 wires double shielded cable that i’m going to use to wire everything again, also get this 4 pin aviator type connectors.
    i’m runnig them with a 24v right now, it’s a meanwell PS i have checked the PS itself and is working right, i work in a LED company so i use them in some LED arrays, i haven’t checked them on the oscilloscope yet.
    I haven’t checked the tinyG input as i’m pretty afraid to burn the board (i’m the kind of guy afraid to electricity).

    I remark the issue related with cables and connector as today i twisted a cable and a motor that wasn’t working start working, really weird thing man!

    i also put tinyG in a metal box suspended with some magnets i use for LED arrays, they are kind of screws isolated with a magnet on one side so they stick so nice to the metal case and gives tinyG sort of 5cm space from bottom to top so air flow mantains the board so ventilated.

    I’m going to check everything you have said and put the results right here.

    Mnay Thanks,

    John Cuervo

    in reply to: help with steppers #7733
    jdcuervo
    Member

    Thanks,

    Yes they still hammer and make erratic movements.

    yesterday i disconnected all cables, motors, endstops, power and so on and today i reconnected all of them and power on tinyG, surprisingly X axis was working ok and in Y axis just one motor was ok, the other couldn’t get energized, Z axis not working at all.

    one could say there’s a problem with the connectors but this was happening before i arrange my connections.

    Limit switches are turn off but problems still there. switches are optical, there’s not such a thing like “magnetic optical” (me mistake).

    thanks for your answer.

    John

    in reply to: help with steppers #7727
    jdcuervo
    Member

    Thanks for your answer!

    First, i have NEMA23 on x and y axis, i have GT2 20 tooth pulleys, my limit switches are magnetic optical, as i’ve read they will work well as NO or NC just i need to configure them, so will no problem to change them to NC. I read a forum about limit switches in synthetos and many things are clear right now.

    Problems with steppers happened before i put on limit switches. so i will discard problems related to steppers with limit switches.

    I’m able to move freely x,y and z, there’s no problem with it and some days ago machine was performing so well, i put it working for at least 4 – 5 hours, problems happened when i unplug cables.

    Yes, i did something with connectors, so you can easily plug or unplug them (i’m trying to start a bussines so that’s why too much effort)

    when i said activated mean when machine activates the endstop, when it reaches the maximum travel limit.

    And yes, when i reset tinyG it cames back to sanity. i saw in you forum that when the endstop reach the limit, it sends a command to tinyG to block all movements and SpDir starts flashing, but it is normal the “need” to do a reset in order to unstuck tinyG?

    Sorry if i’m not clear with all my statements.

    Thanks again,

    John Cuervo

    in reply to: help with steppers #7723
    jdcuervo
    Member

    i have checked some other motors i have, they are brand new and have same problem, so it seems not be related to belts tension.

    in reply to: help with steppers #7722
    jdcuervo
    Member

    Hi! sorry for the delay.

    i’m using a OX kind of machine (from openbuilds). i have checked all you have asked, i’ve adjusted the POTs, copy settings from shapeoko and nothing seems to be working.

    Yesterday i did something that at least in here we do when electronics seems to not be working, i unpluged all the cables from the tinyG for at least 5 hours, when i plug them again, machine started working again, just x and y axis, z is not working at all, i did many tests to the machine and everything was ok with x and Y. this morning i was kinda happy as machine performed pretty well the day before, so i plug some endstops that were missing in my machine, when i switch on tinyG again, the problem with steppers came back, that’s why i think i have a problem related with electricity or ground, don’t really know.

    My settings:https://www.dropbox.com/sh/7uw2a3nc7ttdbu0/AAB8Cz0X5YjBnYkhRIGIP0mYa?dl=0

    There’s also a wrong behaviour with endstops, when they get activated, a red light on tinyG starts flashing (SPdir).

    Z axis appears disabled as i intentional did it.

    Thanks,

    John Cuervo

    in reply to: help with steppers #7716
    jdcuervo
    Member

    there’s also a weird behavior shown in the board, when i use chilipeppr to energize al the motors, not all the green leds light up, sometimes 2 or 3 or non, always is different and you can notice this as well on the motors, some of them get energized and some not, this used to not happend. it seems to be a problem related with PWM as the red light sometimes does not seems to be on.

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