Threading on a Lathe
Posted: Fri May 17, 2019 5:56 am
A setup tip provided by Dana Dunlap, Centroid Support for users threading on a lathe for the first time. You need a 1000 line encoder belted to the spindle at 1:1 with a timing belt and Pro License. Use Centroid Intercon to generate the code to test threading.
"When asking for the report also ask for the Intercon program or g-code if third part. Need to look at the g-part program to see how far out in front of the part they are starting. The start problem is usually they are not starting out in front enough. Usually need about .3 or more in front of where the threads start depending on the machine to get the cross slide up to speed. The ending thread problem is where Parameters 240-242 need changed. Have them change parameter 242 to 60 and parameter 240 to .5 to 2 times the thread pitch. Parameter 240 does not have to be changed with different thread pitch change. The manual explains this on page 239. Parameter 242 will also help the start thread that is why they need to make sure they are not starting at .1 or .05 in front of the part."
"When asking for the report also ask for the Intercon program or g-code if third part. Need to look at the g-part program to see how far out in front of the part they are starting. The start problem is usually they are not starting out in front enough. Usually need about .3 or more in front of where the threads start depending on the machine to get the cross slide up to speed. The ending thread problem is where Parameters 240-242 need changed. Have them change parameter 242 to 60 and parameter 240 to .5 to 2 times the thread pitch. Parameter 240 does not have to be changed with different thread pitch change. The manual explains this on page 239. Parameter 242 will also help the start thread that is why they need to make sure they are not starting at .1 or .05 in front of the part."