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Type: Posts; User: Mellbreak

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  1. Replies
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    Re: CNC 3020T-DJ Spindle Control, JP-382A JP-1482

    Hi Canislupus,

    At the moment, although I'm looking into this, there is no direct method of measuring spindle speed. In this case the board I built measures Mach3's PWM signal and adjusts the...
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    Re: CNC 3020T-DJ Spindle Control, JP-382A JP-1482

    New information added to post 25.

    Bob
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    Re: CNC 3020T-DJ Spindle Control, JP-382A JP-1482

    Post removed by Mellbreak.
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    Re: CNC 3020T-DJ Spindle Control, JP-382A JP-1482

    Good to hear from you again kb0nly but sorry to see you have had bother with your computer. The circuit and board layout diagrams are below...


    263528 263530

    The circuit board...
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    Re: CNC 3020T-DJ Spindle Control, JP-382A JP-1482

    Louie,

    Have a look at post 1 of this thread by kbOnly. You'll find the information you need there along with a circuit diagram of the spindle controller on-off circuit - at least the bits that you...
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    Re: CNC 3020T-DJ Spindle Control, JP-382A JP-1482

    Hi Terry,

    Just tried your suggestion regarding pins 3 and 4 on my board - no luck I'm afraid. If yours works out differently, do let us all know. It would be a neat solution.

    Bob
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    Re: CNC 3020T-DJ Spindle Control, JP-382A JP-1482

    Hi Louie,

    All the connectors are standard JST parts from eBay....


    For example:

    Mini Micro 1 25mm T 1 4 Pin JST Connector with Wire x 10 Sets | eBay

    and
  8. Replies
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    Re: CNC 3020T-DJ Spindle Control, JP-382A JP-1482

    Well I've now got the software into a usable state. It's by no means perfect, but given the limitations and quirks of the original controller board, it doesn't do too bad a job. In reality I suspect...
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    Re: CNC 3020T-DJ Spindle Control, JP-382A JP-1482

    I don't think so Terry. I seem to recall trying this myself and, also, a comment by kb0nly to the effect that he'd mapped out part of the PWM circuit on the board only to find it came to a dead end....
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    Re: CNC 3020T-DJ Spindle Control, JP-382A JP-1482

    My intention is to do a bit more work on the software (hardware seems fine) and then offer it to those who might be interested. More details will follow, I just want to make sure that there's nothing...
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    Re: CNC 3020T-DJ Spindle Control, JP-382A JP-1482

    In short I've built a small board which has on it an opt-isolator, micro controller (PIC16F628) and a digital rheostat. The micro controller measures the length of the PWM period and produces a...
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    Re: CNC 3020T-DJ Spindle Control, JP-382A JP-1482

    I don't know if there is anyone still reading this thread, but I've made some progress on this front. I can now control the spindle speed from Mach3. I have to say that its not been too easy. The...
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    Re: Chinese CNC 3040 Spindle speed control

    Like kb0nly, I been working on the problem of trying to get PWM spindle speed control with systems that use the JP-1482 and JP-382A boards. Unless someone can tell me differently, I am of the view...
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    Hi, Thanks for taking the time to reply. I've...

    Hi,

    Thanks for taking the time to reply. I've obtained a new parallel port card and all is well. Having Mach3 turn the spindle off/on is really useful. At least I find it so.

    Your comments...
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    I've now got this mod working. Originally, when I...

    I've now got this mod working. Originally, when I carried out the alteration, the spindle would be rotating all the time no matter what the position of the spindle on/off switch or how Mach3 was...
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    Thanks for sharing this information with the rest...

    Thanks for sharing this information with the rest of the community, I'm sure that it will be greatly appreciated. I've been trying out your method and unfortunately not had much luck. I can't quite...
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