Okay, so I am having an issue with the Mill in our lab. Is is having issues running and not completing all the operations. It works just fine in continuous flow but when you change the measurements to 1mm and .1mm it doesn’t move physically the the computer is reading the coordinate and moving there. Over the summer the machines were turned off so it’s been off and before it was working fine when we came back one of the connection peices were disconnected and then the machine was not working. Also the batteries were removed from the controller and we put them back in and most of it acting normal until i tried to switch the measurement and it wouldn’t move.
I’m not sure if I understand what it’s doing, I don’t know what continuous flow mean, but if your problem is that the computer is giving commands and reporting that an axis is moving, but the axis is not actually moving, sounds like a motor problem to me. Most hobby or lower end CNCs use stepper motors with no position feedback, so the computer will tell each axis how far to travel, but it doesn’t actually have any sensors to check if it moved.
I would double check all your connections between the controller and the motors. Assuming that finds nothing, start checking for power. First check that all controllers and boards are getting all the power they need (you probably have multiple different voltages being supplied to various devices) then hook up an oscilloscope to the motor leads and see what the motors are seeing.
Assuming I misunderstood the problem and or you can’t find any issues with power or connections, please give more details such as the make and model of mill, how you are controlling it, what software you have running Gcode, pictures of everything you can think of, etc.
I assume you are talking about the Jog control…
Same behavior on all three axis? Continuous jog works.
Probably not a mechanical problem since 3 separate servos affected.
One oddity I have noticed with our omio router that is similar. On power up the incremental steps (1mm .1mm are very slow. painful in fact. Continuous jog is OK. Run a G code routine and after that the incremental steps are much faster. It has not been an issue so I have not spent a lot time on it, but I am assuming the something in G code is setting the jog speed parameter in the Mach3 software to a higher speed
TLDR:
Try increasing the Jog speed in the Mach3 software.
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Thank you I will try that
We have an Avid CNC so other Omio users will probably be better suited to answering questions, but yeah if the Gcode will run and some jogs are fine then your problem will likely be in the computer so have fun digging into the settings.
We had a similar problem on our 3-axis router, and for us it just turned out that one of the cables going from the computer to the CNC was bad and was preventing communication from taking place, so while the computer thought the CNC was moving, the CNC was still as could be. This may be what’s happening with your CNC, but i’d take this with a grain of salt because our CNC is 20 years old and just uses one 16 pin wire for all comms.
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