584,879 active members*
5,293 visitors online*
Register for free
Login

Search:

Type: Posts; User: george4657

Page 1 of 5 1 2 3 4

Search: Search took 0.01 seconds.

  1. Re: Stepper Motor always over-stepping even with low accel and speed

    Two things you can try:
    Increase pulse width $1=20 or 30
    Invert pulse $2 = 7
  2. Re: Stepper Motor always over-stepping even with low accel and speed

    All stepper drivers use a H-bridge to drive the motor. The TB6600 should have no problem driving those motors.
    You talk about gaining steps , which would make travel longer than expected and you...
  3. Replies
    13
    Views
    1,794

    Re: stepper motor holding ability

    You can find the manual at G201 REV-16 | GeckoDrive
    There are jumpers inside.
  4. Replies
    13
    Views
    1,794

    Re: stepper motor holding ability

    According to the manual:
    "AUTO CURRENT REDUCTION: The G201 reduces motor phase current to 33% of the set value when the motor is stopped. If enabled, this reduction occurs 1 second after the last...
  5. Replies
    1
    Views
    606

    Re: 2.5w Laser engraver controler problem

    DO NOT HOOK DIODE UP TO POWER DIRECT!!!
    Laser diodes require maximum current controlled supplies.
    That is what your controller was doing.
    A diode running 5 volts at 1.5 amps for example will heat...
  6. Replies
    4
    Views
    1,389

    Re: Calculate steps/mm

    I know how you feel having worked in imperial for past 70 + years I don't think metric I convert metric to imperial to visualize.
    You can set your CNC up in imperial and to machine metric just put a...
  7. Replies
    4
    Views
    1,389

    Re: Calculate steps/mm

    its better to think through the logic than remember a formula.
    1 revolution takes 200 * 32 steps = 6400 steps/rev
    1 inch movement takes 18 revolutions = 18 * 6400 = 115200 steps/inch
    1 inch =...
  8. Replies
    10
    Views
    2,599

    Re: Help with Grbl Mill Steppers stalling....

    DRV8825 drivers:

    2.5 amps is MAXIMUM CONTINUOUS CURRENT. Pololu recommends 2.2 Amp Max
    To run at this would require very good heat sink attached to bottom of chip. Boards designed for nema 17...
  9. Replies
    4
    Views
    1,228

    Re: Nema 23's calculating steps

    The 1605 moves 5mm in one revolution.
    At 200 steps per revolution = 5/200 = .025 per step.
    1/.025 = 40 steps per mm
    40*25.4 = 1016 per inch.
    Are you working in inches or mm, mach3 will do which...
  10. Re: Gecko 540, UC100 upgrade on Chinese 6040

    The G540 is 10 steps microstepping, were you 8 steps with the old system, that would put you out 25%.
  11. Replies
    10
    Views
    3,094

    Re: Bipolar Series or Parallel Modifications

    I had motor with bad bearing so I took it apart and fixed the bearing. After it turned but lost all its power so it was a fail.
    I had 3 6 wire motors and I locked the shaft in a vise with wooden...
  12. Re: TX14175 input voltage from parallel port

    According to the schematic the board already has 10k pullup resistors to the +5 volt supply so there should be no problem with 3.3 volt input as default will be 5 volts and port will pull it low to...
  13. Re: Help with GBRL and Universal Gcode Sender with Arduino Hobby CNC Plotter

    To drive a stepper you need a H-bridge circuit which is what your L293D are. The h-bridge requires 4 inputs that control how the power flows in the circuit.
    GRBL outputs only 2 controls, step and...
  14. Replies
    19
    Views
    3,263

    Re: Do I need different steppers?

    The 84 volts is not the required voltage, it is the voltage that will give the maximum possible speed out of your motors.
    Your motors will run fine at 48 volts but will not have as high a maximum...
  15. Replies
    24
    Views
    8,906

    Re: Testing 2560 board

    If you look at his page http://www.geeetech.com/wiki/index.php/GT2560
    You will see that the adjustment for current setting of the drv8825 is at the oppsite to a4988 drivers.
  16. Replies
    24
    Views
    8,906

    Re: Testing 2560 board

    It looks like you have your extruder driver drv8825 board plugged in backwards.
  17. Re: What does the DRO read out in Mach normally, mm or inches?

    Can you post a picture of your machine and/or a link to web page for your machine.
    Something is not right.
    5mm dia X.8 pitch is threaded rod not ball screws/
    .8 step per revolution would be a very...
  18. Replies
    9
    Views
    1,878

    Re: DIY Laser cutter Need help!!!

    Your laser appears to be a Benbox clone.
    Check out this website Benbox Laser DIY Machines - Index for a lot of information on this laser and general laser information.
    Youtube also has a lot of...
  19. Replies
    9
    Views
    1,878

    Re: DIY Laser cutter Need help!!!

    "When you say send a command do I need to type "$$" or "$" before the actual command?"
    No $ lists commands and $=??? changes configuration
    $$ is used to read configuration for the software
    Just...
  20. Replies
    9
    Views
    1,878

    Re: DIY Laser cutter Need help!!!

    If laser defaults to on then you have a serious safety problem.
    Did you get a manual or instructions to setup the machine.
    Usual system is to use spindle commands to control laser.
    M5 turn off
    M3...
  21. Replies
    2
    Views
    802

    Re: HELP REQUIRED REGARDING STEPPER MOTORS

    It does not matter which is + or -
    Just hook up one pair to A+/- and one pair to B+/-
    If rotation direction is wrong you can either change direction in software or change one pair of wires
    FYI ...
  22. Re: PCB designer options for bCNC (Arduino UNO with GRBL)

    In flatcam are you using "OpenGerber" and NOT "Open G-Code"
    "Open Excellon" opens drill file
    You export G-Code when finished.
  23. Re: PCB designer options for bCNC (Arduino UNO with GRBL)

    I use Flatcam 8.5 and had no problem loading VoltageRegulator_with_switch_copperBottom.gbl
    Attached is the plot generated by the program 337844
    Because it had a copper pore it generated trace of...
  24. Replies
    8
    Views
    4,128

    Re: Gecko or Lead shine to replace TB6600

    The motor is a 6 wire motor so your only option is to run it Bi-Polar half coil for max speed or Bi-Polar series for maximum power. Bi-Polar parallel requires an 8 wire motor.
  25. Re: cant believe nothing exists in this catagory, i just cant believe it!!!

    Try Delrin (Acetal)
    Check this link for cut offs on Ebay
    CNC, white items in acetal store on eBay!

    Delrin is nice to machine but it may be too soft.
    I have not tried in in high temperatures...
  26. Replies
    26
    Views
    4,673

    Re: CNC Electronics Problem(s)

    The K179 driver has no current limiting so using voltage over the rated voltage will overheat the motors.
    You will need to put resistors in line with each center tap (2 per motor)
    See this link in...
  27. Replies
    13
    Views
    6,336

    Re: Question about behaviour of stepper motors

    With 3d printers it is quite common to run two motors on one driver on the Z axis.
    At 1 amp your drivers are less than normal but may be usable if you are driving a fine screw such as M5 x .8 on the...
  28. Replies
    6
    Views
    1,596

    Re: getting my arse kicked.

    Um/Pulse is how far the machine moves per pulse from controller.
    There are 2 ways to set Um/Pulse, trial and error as Dean suggested and calculation.
    Trial and error:
    Mark starting point
    ...
  29. Replies
    21
    Views
    1,665

    Re: Newb Here - Home Built CNC Questions

    In mach3 the setting is steps per inch not steps per revolution.
    51200 * 13 = 665,600 steps per inch
    This is too fast for most systems
    51200 / 200 full steps/rev is 256 bits/Full step.

    Try 16...
  30. Re: how to make the NEMA 17 4 wire bipolar stepper motor working?

    When power is supplied is the motor locked in position or very hard to turn. This would indicate that the motor is hooked up correctly.
Results 1 to 30 of 128
Page 1 of 5 1 2 3 4