Recently I did a carving attached with 2 (1/16 & 1/32 TBN) follow-ups rest machining, not sure if 1/16 would be enough so I provided an additional 1/32 to see if more detail might be needed. As the carvings evolved, I decided to load the toolpath for 1/32 and executed the toolpath while watching the bit for over an hour, THEN the bit as it was carving along the perimeter the TBN decided to drill to a 1+ inch depth and plow along for 8 inch distance before I was able to emergency STOP without breaking the bit!
Has anyone experienced such an event? Could this be a G-code failure? When I loaded the G-code I know to have given plenty of time to load into Masso and I did nothing while this process played out. It did not ruin the piece but I have concerns for multiple rest machine toolpaths.
Thanks for anyone’s input
Thank You for the quick response. I am a retired electrician and am very much aware of interference of EMI and I have 2 circuits separating the functionality of the various components. My vacuum line is supported with aftermarket bracket at rear of Y rail but is not touching machinery. Is there anything else that comes to mind?
Recent discussion on forum about EMI and suggestions of cause can be resolved from several remedies. I am a retired electrician and I recently encountered a disturbance that I posted on this forum. What I would like to contribute to my fellow CNCers are several topics for resource and understanding. First, research the subject “ferrite chokes”, something I used to resolve my issue. Second, examine the topic “shield cables”, sometimes this can be very useful in a shop with extension cords. Third, research the application of the topic “EMI/RFI filters” which can be applied at the subpanel by a qualified electrician. These are just a few subjects to explore but are worthy of consideration. Good Luck!
One very important detail is your set-up are you using a braking z stepper motor and 80mm spindle? This just happened to me and it was due to a failed braking z stepper motor. After getting a new stepped my system is working 100% and I never any EMI issues.. I also put line filter on all motor connection FYI
Answer to your question is YES, I do use a braking z stepper and 80mm spindle. How did you know that the stepper motor was misbehaving? I am very much interested in how to troubleshoot this topic. I have performed this similar double rest machining without a problem, but it has got me wondering. Thanks, and am very open to learning.
So, for about the first year all good no issues. The I would start to see on power up Z stepper just drop. I would try and home the Z stepper would just randomly drop and trigger a z motor error. I would do a full power cycle and most of the time it would home OK. Then after about six months of this, During a long run the Z brake just triggered on and got a nice long cut into my project like what you showed. On a power cycle brake would not turn off. Ordered a new z braking stepper and all 100% good again..
EXCELLENT point you have shared! I have had this stepper over a year from Onefinity because of Z dropping after I upgraded to spindle. Others on forum had reported similar issues, but after replacement and upgrade to Elite have had no Z drops until recently upon power startup. A very small drop and alarm, causing me to restart and home machine, never thought much about it until your post. I wonder how many others have had similar issues. Could the stepper motors not be powerful enough to handle the weight of the spindle and carriage? Did you contact Onefinity tech support?
