rockfish
Titanium
- Joined
- Aug 27, 2006
- Location
- Munith, Michigan
I'm having a problem with my QT-15.
On larger diameter work, around 3" or bigger, my machine wants to stall on facing cuts. The job I'm working on now is A-2 material, about 3.800 diameter. I have the machine limited to 1000 RPM. Using Mazatrol, I programmed an edge face cut. I backed off the Autoset feedrate to about .012 feed, and depth of cut to .05, and kept stalling the spindle on the first cut, wasting my insert and guaranteeing that I have to go through and pick up every tool again..........which is a huge pain in the ass. The Autoset feature has the spindle running at about 250 RPM or so during the first few cuts. Based on my manual lathe experience, the speeds, feeds and depth of cut all seem reasonable to me for the horsepower this machine has.
Now, I wonder............... is it possible that I'm programming my cutpoint too close and the spindle isn't getting up to speed before the tool bites in ???? If my stock measures at 3.800, should I program the cut point another .02 or .03 bigger ???? Or is my cut too aggressive........or possibly a mechanical problem, such as loose belts or something ???
Otherwise, the machine seems fine.
Frank
On larger diameter work, around 3" or bigger, my machine wants to stall on facing cuts. The job I'm working on now is A-2 material, about 3.800 diameter. I have the machine limited to 1000 RPM. Using Mazatrol, I programmed an edge face cut. I backed off the Autoset feedrate to about .012 feed, and depth of cut to .05, and kept stalling the spindle on the first cut, wasting my insert and guaranteeing that I have to go through and pick up every tool again..........which is a huge pain in the ass. The Autoset feature has the spindle running at about 250 RPM or so during the first few cuts. Based on my manual lathe experience, the speeds, feeds and depth of cut all seem reasonable to me for the horsepower this machine has.
Now, I wonder............... is it possible that I'm programming my cutpoint too close and the spindle isn't getting up to speed before the tool bites in ???? If my stock measures at 3.800, should I program the cut point another .02 or .03 bigger ???? Or is my cut too aggressive........or possibly a mechanical problem, such as loose belts or something ???
Otherwise, the machine seems fine.
Frank