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Thread: Taig CNC-Controller Replacement-Dynomotion Suggestion

  1. #37
    Member PeterTheWolf's Avatar
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    Default Re: Taig CNC-Controller Replacement-Dynomotion Suggestion

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    Tom,

    I do not think I understand how I need to connect a relay to KFLOP correctly.

    I want to use the following relay to turn the 110VAC Spindle Motor on this Tiag machine on and off with M03/M05 command from the NC code / KmotionCNC.

    I have read over the manuals on KFLOP and KSTEP; however, reading and understanding electric Schematics and understanding what I am looking is still weak.

    Visuals diagrams really help me connect the "dots" .............. So, Can I please have you verify how I think this relay should be connect to KLOP?

    Taig CNC-Controller Replacement-Dynomotion Suggestion-5v_relay_connected_to_kflop_wiring-jpg LINK to Word Doc. File


    Taig CNC Machine Quick Links
    ....
    ....

    KFLOP Power Suppy

    Stepper Motor Power Supply Used

    Stepper Motor Used on Taig

    Taig CNC Machine Counter Weight Design

    Taig CNC Machine Counter Weight Design - 3D STEP File

    Word Doc. of my Calculation for the Trajectory Planner

    Word Doc. E6 Optical Kit Encoder

    Relay Connection to KFLOP
    ....
    ....



  2. #38
    Member TomKerekes's Avatar
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    Default Re: Taig CNC-Controller Replacement-Dynomotion Suggestion

    Hi Peter,

    OMG 8 relay driver boards for $12 with free shipping. How do they do this?

    I think your connections would likely work and could not possibly cause any damage.

    But technically it is out of specification to connect that to a KFLOP 3.3V LVTTL IO pin. Under full load of 16ma a KFLOP output is guaranteed to be greater than 2.4V. The Relay board specification claims it needs 3-5V to guarantee to turn on. The relay board also claims it needs up to 5ma to turn on. Furthermore the KFLOP IO pin you have chosen has a pull down resistor of 150ohms that consumes most all of the 16ma leaving little for something else.

    If you were to choose IO 34 or 35 (pins 15 or 16) there aren't any pull down resistors so the full 16ma would be available. Under a load of 5ma (instead of 16ma) the output would likely be higher than 2.4V but still there is no guarantee it would be 3V or higher. Most likely it would be. You could verify with a voltmeter if it actually is 3V or higher.

    Another option is to use the KStep Relay Driver Outputs. See Relay Driver Outputs here. When switching a 5V signal these will output 4V or more at up to 100ma so would easily drive the input. But it wouldn't be clear what the input would be when "off" (open circuit). The Relay board specification claims the input must be less than 1.5V to be off. if the voltage on the input is above 1.5V with an open circuit then a pull down resistor would be needed to guarantee turning off.

    Sorry for no simple answer

    Regards
    TK http://dynomotion.com


  3. #39
    Member PeterTheWolf's Avatar
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    Default Re: Taig CNC-Controller Replacement-Dynomotion Suggestion

    Quote Originally Posted by TomKerekes View Post
    Hi Peter,

    Wow 300mm 5um resolution linear scale for $50 + shipping? I couldn't find the pinout but it says TTL/EIA422 (differential) so it should work.
    ......
    .....
    Ok ... I purchased this Linear Scale Encoder for the X-axis and Here is the PINOUT


    Taig CNC-Controller Replacement-Dynomotion Suggestion-pinout_linearscale-jpg


    Quote Originally Posted by TomKerekes View Post

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    ....

    Yes it is compatible. Purchase the differential output because it can then be connected to either a single ended input or a differential input. KFLOP only has single ended inputs. If you have noise problems you can add differential inputs (Kanalog, SnapAmp, or 3rd party differential receivers).
    Tom, Will it be easier for me to get the Kanalog board for getting the three axis connected to KFLOP/KSTEP on this project?

    I also may add a VFD spindle motor. The Kanalog will be needed for this... right?

    Thanks,





    Taig CNC Machine Quick Links
    ....
    ....

    KFLOP Power Suppy

    Stepper Motor Power Supply Used

    Stepper Motor Used on Taig

    Taig CNC Machine Counter Weight Design

    Taig CNC Machine Counter Weight Design - 3D STEP File

    Word Doc. of my Calculation for the Trajectory Planner

    Word Doc. E6 Optical Kit Encoder

    Relay Connection to KFLOP
    ....
    ....



  4. #40
    Member TomKerekes's Avatar
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    Default Re: Taig CNC-Controller Replacement-Dynomotion Suggestion

    Hi Peter,

    Tom, Will it be easier for me to get the Kanalog board for getting the three axis connected to KFLOP/KSTEP on this project?
    Kanalog is required to connect to KFLOP's JP7 connector. Adding a Kanalog will require you to remove KStep from JP7 and you will lose the extra KStep IO (16 opto inputs, 2 opto outputs, and analog output). So although Kanalog adds differential inputs for the encoder, and screw terminals and other IO which would be helpful, it is probably simpler to add differential inputs some other way.


    I also may add a VFD spindle motor. The Kanalog will be needed for this... right?
    KStep has an opto isolated analog output for this,

    Regards
    TK http://dynomotion.com


  5. #41
    Member PeterTheWolf's Avatar
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    Default Re: Taig CNC-Controller Replacement-Dynomotion Suggestion

    Quote Originally Posted by TomKerekes View Post
    .........

    If you were to choose IO 34 or 35 (pins 15 or 16) there aren't any pull down resistors so the full 16ma would be available. Under a load of 5ma (instead of 16ma) the output would likely be higher than 2.4V but still there is no guarantee it would be 3V or higher. Most likely it would be. You could verify with a voltmeter if it actually is 3V or higher.
    This works. I am getting 1.5mV on KFLOP JP6 Pin 16 (IO35) with this relay connect and 3.27VDC on KFLOP JP6 Pin 16 (IO35) when I turn it on in Kmotion Digital I/O screen and the relay is pulled in.
    Thanks Tom ...........

    Taig CNC-Controller Replacement-Dynomotion Suggestion-5v_relay_kflop_wiring-jpg Link to Word Doc.



    Taig CNC Machine Quick Links
    ....
    ....

    KFLOP Power Suppy

    Stepper Motor Power Supply Used

    Stepper Motor Used on Taig

    Taig CNC Machine Counter Weight Design

    Taig CNC Machine Counter Weight Design - 3D STEP File

    Word Doc. of my Calculation for the Trajectory Planner

    Word Doc. E6 Optical Kit Encoder

    Relay Connection to KFLOP JP6 Pin 16 (I/O 35)

    ....
    ....



  6. #42
    Member TomKerekes's Avatar
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    Default Re: Taig CNC-Controller Replacement-Dynomotion Suggestion

    Great. Thanks for taking the time to post back.

    Regards
    TK http://dynomotion.com


  7. #43
    Member PeterTheWolf's Avatar
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    Default Re: Taig CNC-Controller Replacement-Dynomotion Suggestion

    Quote Originally Posted by TomKerekes View Post
    Hi Peter,

    Higher resolution is always better until you exceed the count rate of the encoder input at maximum RPM. KFLOP can conservatively accept 1 million quadrature counts/second.

    2000 cycles/rev at 2000RPM would be:
    2000 x 4 x 2000 / 60 = 266K counts/sec

    And at 20 TPI would give a resolution of
    20 x 2000 x 4 = 160,000 counts/inch (6.25ui)

    I will not be able to use Linear Glass Scale on the Taig ... just not enough room for mounting it on the X-Axis.

    So, I will be going with the US Digital E6 rotatory encoder.



    Tom,

    If more is better and I will max. out at 1000 RPM with these stepper motors,
    shouldn't I use an encoder with 4000 CPR?

    Another question I have is, should I be configuring these encoders with the "Index" or "No Index"?

    Thanks,



    Taig CNC Machine Quick Links
    ....
    ....

    KFLOP Power Suppy

    Stepper Motor Power Supply Used

    Stepper Motor Used on Taig

    Taig CNC Machine Counter Weight Design

    Taig CNC Machine Counter Weight Design - 3D STEP File

    Word Doc. of my Calculation for the Trajectory Planner

    Word Doc. E6 Optical Kit Encoder

    Relay Connection to KFLOP JP6 Pin 16 (I/O 35)

    ....
    ....



  8. #44
    Member TomKerekes's Avatar
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    Default Re: Taig CNC-Controller Replacement-Dynomotion Suggestion

    Hi Peter,

    If more is better and I will max. out at 1000 RPM with these stepper motors,
    shouldn't I use an encoder with 4000 CPR?
    4000 cycles/rev would be:

    4000 x 4 x 1000 / 60 = 267K counts/sec

    and should work fine.


    Another question I have is, should I be configuring these encoders with the "Index" or "No Index"?
    An Index pulse can help with more accurate homing. You would first search for a home/limit switch and then search for up to one revolution for the index pulse. Its up to you. If you include the Index pulse output you can always just not connect it and not use it.

    Regards
    TK http://dynomotion.com


  9. #45
    Member PeterTheWolf's Avatar
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    Default Re: Taig CNC-Controller Replacement-Dynomotion Suggestion

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    ..............

    Tom,

    I am using the E6 Rotary Encoder on the back of one Stepper motor for testing.

    I have put together of HTML link for a Cable Pinout from the Encoder to KFLOP via RJ45 and a C46 Differential to Single Ended Converter (from Welcome to CNC4PC).

    Can you please double check my pinout?

    My main concern is the last image of the HTML Link to ensure I am understanding the connection to KFLOP.
    This is only for one axis; however, the last RJ45 connection to KFLOP will be with all three axis.

    Taig CNC-Controller Replacement-Dynomotion Suggestion-004_rj45_breakoutboard_to_rj45_end_for_kflop-jpg



    Taig CNC Machine Quick Links
    ....
    ....

    KFLOP Power Suppy

    Stepper Motor Power Supply Used

    Stepper Motor Used on Taig

    Taig CNC Machine Counter Weight Design

    Taig CNC Machine Counter Weight Design - 3D STEP File

    Word Doc. of my Calculation for the Trajectory Planner

    Word Doc. E6 Optical Kit Encoder

    Relay Connection to KFLOP JP6 Pin 16 (I/O 35)

    E6 Encoder PinOut to KFLOP PinOut


    ....
    ....



  10. #46
    Member TomKerekes's Avatar
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    Default Re: Taig CNC-Controller Replacement-Dynomotion Suggestion

    Hi Peter,

    That seems correct to me.

    But it isn't clear that GND and +5V from KFLOP are being supplied to all the encoders (C46) pins 1 and 2.

    Regards
    TK http://dynomotion.com


  11. #47
    Member PeterTheWolf's Avatar
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    Default Re: Taig CNC-Controller Replacement-Dynomotion Suggestion

    Quote Originally Posted by TomKerekes View Post

    ........

    But it isn't clear that GND and +5V from KFLOP are being supplied to all the encoders (C46) pins 1 and 2.
    Yes .... I should have depicted this as well , I was thinking I would connect to the RJ45 break-out board Pin #2 & Pin #1 with the use of KFLOP JP6-Pin #1 for +5VDC and KFLOP JP6-Pin #8 for Ground, respectively.

    Do you see any issues with this?

    Thanks,

    Taig CNC-Controller Replacement-Dynomotion Suggestion-004_rj45_breakoutboard_to_rj45_end_for_kflop-jpg



    Taig CNC Machine Quick Links
    ....
    ....

    KFLOP Power Suppy

    Stepper Motor Power Supply Used

    Stepper Motor Used on Taig

    Taig CNC Machine Counter Weight Design

    Taig CNC Machine Counter Weight Design - 3D STEP File

    Word Doc. of my Calculation for the Trajectory Planner

    Word Doc. E6 Optical Kit Encoder

    Relay Connection to KFLOP JP6 Pin 16 (I/O 35)

    E6 Encoder PinOut to KFLOP PinOut


    ....
    ....



  12. #48
    Member TomKerekes's Avatar
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    Default Re: Taig CNC-Controller Replacement-Dynomotion Suggestion

    That should work.

    Regards
    TK http://dynomotion.com


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