I have a cnc system which uses the thread rods, 2 Y motors, x motor and z motor. All connected with the coupler with 2 set screws between the motor and threaded rod. Using vcarve desktop and tiny g. I been using it for about 2 years or so cutting 100's of projects. I was making a project cutting a few small 13mm holes in a piece of wood using 1/4" end mill bit. Each of the holes cut with a flat side. I adjusted the speed rate and direction etc but still get the issue. After reading on the internet. I checked the backlash which seem to be ok. Even replaced them with spares. I checked the coupler set screws and re-tighten them. Too be honest in all my projects this is the first small circle I have done, so I never noticed the issue. It seems to be where the bit enters the circle to start the cut. I slow down the feed rate and plunge rate into the cut as well. Could this be one of the motors issue? Thanks.
Hi Gazingm42, Picture? unless you are loosing steps it's not the motor, most likely it's the file or your sender not treating arc radius correctly. Are you making the file (drawing and cam) with vcarve? Post the code file (.cn or .cnc) with the small holes so we can take a look at it. Gary
I drawing a 14mm circle in vcarve. G90 G17 G21 G0Z1.000 G0X0.000Y0.000 M3 S12000 G0X53.184Y65.175Z1.000 G1Z-3.200F127.0 G3X57.509Y69.500I0.000J4.325F381.0 G3X53.184Y73.825I-4.325J0.000 G3X48.859Y69.500I0.000J-4.325 G3X53.184Y65.175I4.325J0.000 G1Z-6.400F127.0 G3X57.509Y69.500I0.000J4.325F381.0 G3X53.184Y73.825I-4.325J0.000 G3X48.859Y69.500I0.000J-4.325 G3X53.184Y65.175I4.325J0.000 G1Z-9.600F127.0 G3X57.509Y69.500I0.000J4.325F381.0 G3X53.184Y73.825I-4.325J0.000 G3X48.859Y69.500I0.000J-4.325 G3X53.184Y65.175I4.325J0.000 G1Z-12.800F127.0 G3X57.509Y69.500I0.000J4.325F381.0 G3X53.184Y73.825I-4.325J0.000 G3X48.859Y69.500I0.000J-4.325 G3X53.184Y65.175I4.325J0.000 G1Z-16.000F127.0 G3X57.509Y69.500I0.000J4.325F381.0 G3X53.184Y73.825I-4.325J0.000 G3X48.859Y69.500I0.000J-4.325 G3X53.184Y65.175I4.325J0.000 G0Z1.000 G0X86.812Y68.989 G1Z-3.200F127.0 G3X90.637Y65.164I3.825J0.000F381.0 G3X94.462Y68.989I0.000J3.825 G3X90.637Y72.814I-3.825J0.000 G3X86.812Y68.989I0.000J-3.825 G1Z-6.400F127.0 G3X90.637Y65.164I3.825J0.000F381.0 G3X94.462Y68.989I0.000J3.825 G3X90.637Y72.814I-3.825J0.000 G3X86.812Y68.989I0.000J-3.825 G1Z-9.600F127.0 G3X90.637Y65.164I3.825J0.000F381.0 G3X94.462Y68.989I0.000J3.825 G3X90.637Y72.814I-3.825J0.000 G3X86.812Y68.989I0.000J-3.825 G1Z-12.800F127.0 G3X90.637Y65.164I3.825J0.000F381.0 G3X94.462Y68.989I0.000J3.825 G3X90.637Y72.814I-3.825J0.000 G3X86.812Y68.989I0.000J-3.825 G1Z-16.000F127.0 G3X90.637Y65.164I3.825J0.000F381.0 G3X94.462Y68.989I0.000J3.825 G3X90.637Y72.814I-3.825J0.000 G3X86.812Y68.989I0.000J-3.825 G0Z1.000 G0Z1.000 G0X0.000Y0.000 M30
Circles look fine so it's something with the machine. Are steps being lost? could be current setting or loose connection to motor.
