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« on: April 23, 2014, 05:55:23 PM »
Yes, it is now cutting the same for a 4 arc circle as a 1 arc circle.
I can see your point about the lookahead and it was set to 20 steps by default but again, possibly I imagined reading it or someone recommended to change it to 200. I did think it a bit odd when trying to run a circle program that had at best 20 lines so setting it to 200 seemed a bit pointless. Perhaps I should trust my own thinking but at the time I thought it may have been better suited to when I actually got round to running bigger programs. Anyway as a newcomer to this every day is a learning experience. I will set it back to 20. I also learned to never try and open the config when cutting something on the machine. It did not like that.
With respect to the CV distance value is that lines of code or is it steps in a direction? Is it worthwhile turning that on? What is it's purpose? When you say that if CV is working properly... how do I know that it is not? Is there a shape (don't say circles) that I could cut that would show it is doing what it should?
The stuttering effect I sometimes see when it comes to a transition point in a curve is what I was referring to when asking if it is a characteristic of the stepper motors. Setting the lookahead back to 20 may cure this I suspect.
I think I may be able to reduce the feedrate of the cutter a bit but I am using twin fluted cutters and I think that is about the right feed speed for them. When increasing the acceleration at what point will I know that it is not actually having any physical effect due to the trade off between velocity and acceleration? I have been watching the feedrate DRO as it has been cutting and on curves and anything that is not a straight line then obviously it drops a fair bit but once it gets to a straight line it accelerates well up to max feedrate. I am bearing in mind you have never seen this machine... however ... what is an ideal acceleration value to aim for? Or am I not actually looking for a value just the performance of cut?
I apologise in advance for continuing to ask foolish questions!