1. #1
    i was cutting a sample 3d part today just trying things out, roughed it out fine, changed tool and then started finishing. after a few cuts router basically lost position but the motors did not stall, it was as if it missed a couple of lines and then moved on. not sure what happened. anyone got any ideas

  2. #2
    Trying to go too fast ?
    What do you have acceleration and velocity set to ?
    Also who breakout board are you using ?
    John S -

  3. #3
    its a routout cnc breakout board. velocity set to 2000mm/min max. accellleration is set to about 0.25 seconds. the rest of the progrm ran fine it was just this one bit that did it so i don 't think the velocity/acceleration is a problem hopefully

  4. #4
    feed in the program was 1500mm/min

  5. #5
    Velocity and feed sound reasonable but acceleration sounds very high, might not be able to have time to move, try increasing the time.
    John S -

  6. #6
    One way to see if it's going to stall is run something like this:

    G0 X0 Y0
    G0 X100 Y100
    G0 X0 Y0
    G0 X100 Y100
    G0 X0 Y0
    G0 X100 Y100
    G0 X0 Y0
    G0 X100 Y100

    Doing that clearly moves X and Y at maximum feed, then reverses ... so if the acceleration is wrong that's quite likely to stall it. My machine used to stall if I ran that code at 8m/min, then I changed the computer to a better one and it'll do that at 15m/min without stalling.

  7. #7
    Best to put a G21 on the top line in case he's from the States :lol:
    John S -

  8. #8
    Quote Originally Posted by John S View Post
    Best to put a G21 on the top line in case he's from the States :lol:
    Nah, that'd be his own fault for using silly units and not having limit switches!

  9. #9
    LOL !!
    John S -

  10. #10
    npe i'm from uk, cornwall and i do have limits so it won't matter any way. i'll try turning the accelleration down a little.thanks

Similar Threads

  1. Spindle position sensor
    By GeoffV in forum Motor Drivers & Controllers
    Replies: 3
    Last Post: 23-03-2014, 09:00 PM
  2. Machine tool transporters that will move machines into position
    By komatias in forum Marketplace Discussion
    Replies: 6
    Last Post: 09-08-2013, 06:27 AM
  3. Mach3 Tool Change Position
    By Mad Professor in forum Artsoft Mach
    Replies: 7
    Last Post: 15-07-2013, 05:54 PM
  4. Position feedback
    By D.C. in forum Electronic Project Building
    Replies: 4
    Last Post: 17-10-2012, 10:30 AM
  5. Manual Miller Position, Bracknell
    By GMNOCNC in forum Opportunities Available & Sought
    Replies: 0
    Last Post: 23-03-2011, 06:46 PM


Posting Permissions

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