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Thread: my good JCUT6090B french experience

  1. #13
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    JCUT6090B parameters

    Hi,

    The machine electronics is "simple", it's only stepper motor ... with step and direction command.

    So perhaps (but not sure at all) that the dir pulse you told about is the direction of the movement. Did you try to set it to 1 ?
    Or do you have another "check box" to reverse axis direction ?


  2. #14
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    Hi
    Not sure if that box is for changing direction. I believe you have to go into ports and pins tab for that. I will try and set it differently to see what happens.

    thanks
    chris


  3. #15
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    salut, hello
    qui à un retour d'expérience avec cette carte en usb et mach3?
    merci

    who can give his experience with these usb card et mach3 ?
    thanks
    for CNC woodcarving - 3d puzzle - furnitures
    http://pagesperso-orange.fr/fabrun/


  4. #16
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    Après un déménagement, beaucoup de boulot et peu de temps à consacrer à ma machine, voici quand même quelques retours.

    J'ai eu beaucoup de mal avec l'interface USB que JCUT a installé. Pour faire simple, seuls les 3 axes fonctionnaient. Impossible de faire fonctionner les sorties pour mettre en marche la broche ou la lubrification... En plus les drivers de la carte ne sont pas compatibles avec les anti-virus. JCUT me conseillait donc d'enlever les antivirus du PC et n'avait aucune solution pour faire fonctionner les entrées / sorties. Ajouté à cela la pauvreté de la documentation sur cette carte et l'impossibilité de trouver des informations sur internet, j'ai fini par la débrancher ...

    J'ai donc du acheter une nouvelle carte, tout recabler ect... Et en passant refaire un fin de course pour l'axe des X car celui d'origine était mal situé et il a fini par être détruit.
    Il faut se méfier également du cablâge d'origine. Dans mon cas la broche tournait en sens inverse et j'ai du permuter 2 câbles sur l'inverseur. Avant de m'appercevoir de cela, j'ai eu le temps de ruiner 2 ou 3 fraises...

    Autre problème que j'ai eu: un jeu important dans l'axe des Z. Les douilles à billes n'étaient pas correctement fixées dans leur support et j'ai du reprendre le serrage.

    Suite à ces problèmes, tout semble fonctionner correctement. J'ai même usiné un "palpeur d'outil" en POM C: petit contact sur lequel la broche descend, ce qui permet de pouvoir mesurer les différences de hauteurs entre deux outils successifs et d'éviter d'avoir à refaire le zéro sur l'axe Z à chaque changement d'outil.
    J'ai enlevé les bandes en plastique qui je pense étaient là pour servir de martyr mais que je soupçonne de ne pas être très stables géométriquement, et de mal réagir au vibrations et aux efforts de coupe.
    Ma prochaine étape sera de surfacer la table en aluminium pour avoir une référence bien plane pour mes futurs usinages.

    A ce sujet, j'ai essayé de régler au mieux la perpendicularité de l'axe Z mais je n'ai pas de méthode particulière pour m'en assurer. Droiddesigner, toi qui l'as déjà fait, as-tu une technique à me proposer?

    Pour conclure, mon avis est que cette machine est bon marché mais on n'en a pas plus que pour son argent. Pas moins non plus, une fois tous les problèmes réglés, on a quand même une bonne machine. Quand à la faire tourner avec Mach3, autant directement faire le câblage sois-même en commandant séparément, une bonne carte d'interface.


    -------------------

    After a period with a lot of work and few time for my machine, here are som news:

    I had a lot of problems with the the JCUT USB interface: impossible to have the I/0 working, only the 3 axis did work correctly and no way to swich on or off the spindle, flood system ect... Moreover, there is an incompatibility between this card and the antivirus. The documentation for this card is very poor, and JCUT was not able to help me with it, so I decided to unplug the card.

    So I had to buy another card, configure and wire it. And also change the X limit switch that had been destroyed because the original one was not well situated.
    Be careful also with the original wiring: my spindle was in revers while it should have been turning CW, and I had to rewire it. Before realizing this, I broke 2 ore 3 end mills...

    Another problem I had: an important looseness on the Z axis: the linear ball bearings were not correctly tightened in their support and I had to fix that.

    After fixing all this, everythings seems to work correctly. I even machined a height gauge out of POM C, in order to measure tool height and not to have to zero the Z at each tool change.
    I removed the plastic things on the table because I think they are not good for accuracy because of the vibrations, and for part positionning also.
    The next stage is to surface the aluminium table in order to have a good planeity.

    By the way I did my best to set the perpendicularity of the Z axis but I am not sure I have the good technic for that. I'll appeciate if somebody has an idea...

    My feeling for this machine is that even if it looks cheap, one will not get more than one will pay for it, but no less neither because once fixed and and set, this is still a good machine.
    About running it with mach3, the simplest way is still to order a regular machine without mach3 setup and to wire yourself a good usb interface.


  • #17
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    i had better luck with the jcut usb card. the 7 input ports work well if u understand how to wire the input devices such as switches or tool probe. the ports send 24v out to the input devices and are expected to be grounded back to the ground port on e usb card. u need to map the ports and pins in mach3. the output ports are supposed to be connected to relays to switch devices like mist spray, spindle cw and rev ports. the way jcut wires the machine is very rudimentary, totally not making use of the usb card's features. the spindle is hard wired on the vfd to only spin cw. if they made a mistake in this, it may only spin ccw or totally disabled. the spindle is always on due to the hard wiring but would only spin if pwm signal is received from the 0-10v analogue port on the usb card. the e-stop button is connected in series with the main power source which means triggering it shuts down the whole machine. i've feedback this to jcut hopping they would understand the wiring issues.


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