[gtkemp]

Hello and thanks in advance for any help.

I am new to CNC turning. I have been getting use to the control on the TL-2 in particular the IPS quick programing layer.

I have been able to setup the tools and the offsets and use the canned operations. I have one problem that is driving me nuts.

When I setup an OD turning cycle, for example:

start diameter: 2.000
Final diameter: 1.75
Depth of cut: .010
Feed: .005

The cut always starts about .050 larger than the start diameter. So in the example above the canned cycle would start and progress like this:

X= 2.050
X= 2.040
X= 2.030
X= 2.020
X= 2.010
X= 2.000
X= 1.990 (finally removing stock)

The final diameter turns out fine.

I cannot figure out where the "boy now that was stupid" ah ah answer is.

Please Help

[garylb]

could it be that you are using very small cuts? 0.010 is very small. Try 0.040 cuts and see what happens. Mine does the same. I think the machine allows itself a clearance so wont start at the "start diameter"