cmcgrath5035

Forum Replies Created

Viewing 15 posts - 871 through 885 (of 1,771 total)
1 2 3 … 58 59 60 … 117 118 119
  • Author
    Posts
  • February 18, 2016 at 6:49 am in reply to: Travel per revolution Settings #9356
    cmcgrath5035
    Moderator

    How did you make the VM and FR parameters changes?
    From within CP, that translates to using the Serial Port Console and entering parameters one at a time, using the configuretinyG widget GUI to make changes, or perhaps using the Archive/Restore widget.

    Bottom line, avoid using the configuretinyG widget, it has caused issues for some folks. I recommend Serial Port Console, sent one at a time.

    It appears you have (or think you have) resolved your issue.

    Can you describe briefly how you implement changes via Matlab?
    Others have asked in the past similar question.

    February 18, 2016 at 6:28 am in reply to: Jog axis from iOS #9355
    cmcgrath5035
    Moderator

    see

    February 18, 2016 at 6:26 am in reply to: Correct approach to jogging #9354
    cmcgrath5035
    Moderator

    This comment applies to both your jogging posts –
    There is no Native command for jogging in the tinyG FW.
    All the interfaces I have experienced (a subset of what is out there) implement a two step process. First, you select a jogging granulatity, what distance you want a jog request to move, then Second an interface that selects which of the six movements to make jog, X+, X-, Y+,Y-, Z+, Z-.
    Jogs are sent as G0 or G1 Gcode commands.
    I have not see A,B,C rotational axis jog interfaces, but certainly the same strategy could be used.

    Since you have a joystick, you could also implement more complex jogs(G1 XxxYyy) by translating your proportional joystick direction into proportionally scaled XYZ movement parameters.

    But in the end, it all boils down to scaling the input(joystick, keyboard key, jog button) by you selected granularity (precision) then sending G0 or G1 commands.

    Hope that helps.

    February 14, 2016 at 10:45 am in reply to: Delta printer support? #9347
    cmcgrath5035
    Moderator

    I am not ignoring you; I have asked one of the devs to comment here, as they may have some ideas.

    February 12, 2016 at 8:18 pm in reply to: Driver chip smoke #9345
    cmcgrath5035
    Moderator

    Congrats

    February 8, 2016 at 6:15 am in reply to: Plasma THC #9342
    cmcgrath5035
    Moderator

    My Czech not very good(non-existant, actually 🙂 ).
    Aware of any references in English available?
    Google Translate not much help.

    It would seem likely you will need I/O that tinyG does not have on-board.
    Some folks are using RasPi 2 in conjunction with tinyG.

    What do you plan to use to support CAM and GUI?
    There is some integration of control via RasPi in Chilipeppr.

    February 6, 2016 at 10:27 pm in reply to: Can't connect LinuxCNC, but coolterm is ok #9338
    cmcgrath5035
    Moderator

    I have never seen anyone try LinuxCNC with tinyG.
    LinuxCNC’s legacy was parallel port I/O and, if I recall correctly a couple years back, LinuxCNC performed much of the motion planning that tinyG does.
    Perhaps the model there has changed.

    Did you ask over at LinuxCNC?

    Many folks here use CoolTerm for basics and either Chilipeppr or home-brew for Gcode Management.

    • This reply was modified 10 years, 2 months ago by cmcgrath5035.
    February 6, 2016 at 6:30 pm in reply to: I/O question #9336
    cmcgrath5035
    Moderator

    Review the document URL above.
    $p1p0f sets the off (0) state duty cycle of the PWM stream.
    Valid range is 0 to 100% duty cycle, 0.0-1.0.
    The pwm led you mention being lit is connected across the PWM pin to ground.
    Look closely, there is an intensity difference between $p1pof=0.1 (the default value) and $p1p0f=1.0
    PWM is a pulse stream, at frequency $p1frq (Hz) with Duty cycle determined by GCode S variable.

    There are two available output pins, if you don’t uses tinyG to control a spindle.

    Coolant pin is always available, follows the Gcode (M7 or M8) and M9 commands

    Spin is on/off, following M3 and M5 commands

    All tinyG I/O is 3.3v logic

    February 5, 2016 at 7:45 pm in reply to: I/O question #9334
    cmcgrath5035
    Moderator

    Set $p1pof=0.0
    Discussed here:

    One or two bits, intended for other uses (coolant, spindle on/off).
    How much you need?

    February 4, 2016 at 5:29 am in reply to: Multiple Z Axis Possible? #9330
    cmcgrath5035
    Moderator

    Sounds feasible and very reasonable approach for someone able to glue it all together with the right code.
    Good luck with your project.

    February 4, 2016 at 5:23 am in reply to: Raspberry Pi 2 and TinyG #9329
    cmcgrath5035
    Moderator

    Bob
    JohnL IS Mr. Chilipeppr 🙂

    I would characterize the current situation as follows:
    In Chilipeppr architecture, there is the CP Browser Ap and the SPJS appliance Ap. The SPJS is typically close (a USB cable’s distance) to tinyG, the Web Ap can be anywhere. As unique needs for I/O arise that are not easily handled by tinyG, the SPJS hardware steps in. The Pi2 (and probably similar) appliance is a great fit. The SPJS Ap is evolving to provide greater control flexibility via the Pi2 with appropriate command links from the CP Web ap.

    Is a great place to watch the applications develop and evolve.

    February 2, 2016 at 7:10 pm in reply to: Driver chip smoke #9326
    cmcgrath5035
    Moderator

    just for grins i drove an unconnected stepper thru a resistor and diode and it makes quite a generator.. upwards of 60v! no more backdriving

    Other low cost ways to generate power:
    Used Razor scooter motors and used (cannibalized) motors from treadmills.

    I use a scooter motor and low cost PWN controller as an uber-powerful DC controlled sewing machine motor

    • This reply was modified 10 years, 2 months ago by cmcgrath5035.
    February 2, 2016 at 7:05 pm in reply to: TinyG/Arduino/SD card Stand Alone CNC Machine #9325
    cmcgrath5035
    Moderator

    You are having way too much fun.
    Since you are a Python sort of guy, read this:

    February 2, 2016 at 6:58 pm in reply to: Multiple Z Axis Possible? #9324
    cmcgrath5035
    Moderator

    The TinyG has 4 motor ports but is capable of doing 6 axis. To get the other two ports can I use another TinyG or gShield and connect them together (master/slave configuration)?

    In theory you can have master/slave tinyG’s (not GShield here).
    I have not seen anyone talk about it, which begs the question of how well it might work.

    You might want to peruse tinyG2,

    With a Due you can fully decode 6 axis motion, but you would have to come up with custom motor drivers.

    I am not at all sure how you would implement two Z xais setups mechanically, a ‘simple solution’ would be to have different config files, one that assigned motor 4 to Z1 and Motor 5 to Z2.
    Challenges that remain are only one set of spindle control ports (PWM ports) and finding something to generate Gcode for it.

    February 1, 2016 at 1:06 pm in reply to: Steppers don't jog #9320
    cmcgrath5035
    Moderator

    There are a LOT of numbers to keep track of.
    When you are satisfied with a setup, make a copy of the $$ dump and keep around for future comparison.

  • Author
    Posts
Viewing 15 posts - 871 through 885 (of 1,771 total)
1 2 3 … 58 59 60 … 117 118 119