545,577 active members*
7,114 visitors online*
Register for free
IndustryArena Forum > CNC Electronics > Stepper Motors / Drives > Stepper Motors lockup during operation.
Results 1 to 2 of 2
  1. #1

    Join Date
    Jun 2021

    Exclamation Stepper Motors lockup during operation.

    I've had a generic Chinese CNC machine for about 2 years now and generally its been 'just ok' ..
    Haven't used it very much, maybe a total of 50 hours over the 2 years, so basically still new.

    The problem I am having with it, is that during the machining process the stepper motors will randomly stop/jam for a few seconds then go again.
    When this jam happens, the software continues to send data to the controller and gets out of sync with the actual machine.
    Then when the steppers start working again, it has skipped a whole section of the job and just makes a mess of everything, resulting in a waste part.

    My question is:
    What can cause the steppers to simply stop/jam like this and is there something I can do to fix it ?
    Any help would be very appreciated ..

    Here is a short video of what I am trying to describe ..

    EDIT: This is the only information I have on the CNCest Machine (From Ebay seller)

    cnc engraving machine parameters:
    X,Y,Z Working Area?600(Y)*390?X?*120(Z)mm
    Outside dimension?865*680*570mm?L*W*H?
    Table size?770?Y?*490?X?mm
    Lathe structure?6061/6063 Aluminium alloy
    Max. Feeding height??100mm
    Drive unit
    X axis?1605 Ball Screws
    Y axis?1605 Ball Screws
    Z axis?1204 Ball Screws
    Sliding unit
    X axis?High intensity Chromeplate shaft
    Y axis?High intensity Chromeplate shaft
    Z axis?High intensity Chromeplate shaft
    Stepping motor?57 two-phase 3A 150N.cm
    Spindle motor?tips?1,The spindle motor must connect with the VFD.2,It cannot directly connect with the supply voltage (AC220V).3,Please don’t change the data setting of the VFD if you are not professional technicians, or it might damage the spindle motor.
    Outside dimension?65*158mm
    Material?304 stainless steel?Copper coil?Pressure cast aluminum pipe water jacket
    VOLTS?current?power?AC220V/60Hz?5A,1.5KW VFD
    Spindle speed:24000 rpm
    Max working frequency?400Hz
    Principal axis collet:ER11collet?Standard configuration :6mm
    Nut Model?ER11-A
    Speed mode ?By adjusting the VFD output voltage and operating frequency from 0-24000RPM
    Lubrication way?lubricated by high grease
    Repeat accuracy?0.05mm
    Carving Instructions?G code / TAB files / nc file / NCC files
    Software environment?Windows XP/win7
    Maximum speed?0-4000mm/min
    Carving speed?0-1500mm/min(different materials differ?
    Control box parameters:
    Operating Voltage?AC220V
    Control unit?Toroidal transformer + PWM power supply module + TB6560 stepping motor drive
    Command code?G code
    Acceptable software?Mach3,EMC2
    Protection?Emergency stop button

  2. #2
    Join Date
    Jul 2018

    Re: Stepper Motors lockup during operation.

    Hi Sobo -There are two things that will cause this issue 1) the acceleration setting is too high so as the machine tries to achieve the set accel it can't and stalls 2) there is a mechanical issue with the drives creating extra friction that creates the stall.

    1) set the accel very low and slowly work it up and see what happens
    2) check all mechanicals on the drives that stall. Something will be loose or tight or worn

Similar Threads

  1. Noisy stepper operation
    By bunnybungo in forum Stepper Motors / Drives
    Replies: 0
    Last Post: 09-06-2019, 12:52 PM
  2. servo motors or stepper motors for ATC machine
    By Fanny-Roctech in forum Roctech CNC Routers
    Replies: 0
    Last Post: 04-21-2015, 03:29 AM
  3. Replies: 2
    Last Post: 07-12-2009, 10:10 AM
  4. Wanted DIY stepper driver circuit for 6 wire stepper motors
    By Colin300 in forum Australia, New Zealand Club House
    Replies: 5
    Last Post: 09-21-2007, 03:20 AM
  5. Normal stepper operation?
    By LeeWay in forum Stepper Motors / Drives
    Replies: 5
    Last Post: 03-12-2005, 02:33 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts