Stirling
Hot Rolled
- Joined
- Dec 11, 2013
- Location
- Alberta canada
hello,
I am experiencing a heavy vibration when x axis rapids twrards the chuck on my slant bed lathe (modern/microcut lt-65, buffilo machine tools tiwaneese build 20hp).
to deiscribe the vibration i would say it reminds me of spinning up the 8" chuck to 3000 with slightly off balances jaws. not scary, but very obviously present
i have pulled off all sheetmetal that slides with the axis to rule it out, removed the servo to hand spin, no shaft play, typical cogging feeling on the magnetic poles.
the servo does get rather hot if you rapid up and down 20 times, and if i use the machine it errors our under far less load than normal.
using a ratchet to jog the axis with servo removed it is not perfectly smooth. thought it never has been, it does not have a consernable effort to turn, but there is knotchy sections. i cannot see this as a source of significant load or vibration.
linier ways and ball screw look fine.
possible ball screw end bearings?
i have nver replaces a ball screw, is "pre tenisioning" after end bearing changes hard to do?
looking for your thoughts. ive owned it 4 years and not had this issue.
not scared to rip and tear.
thanks!
I am experiencing a heavy vibration when x axis rapids twrards the chuck on my slant bed lathe (modern/microcut lt-65, buffilo machine tools tiwaneese build 20hp).
to deiscribe the vibration i would say it reminds me of spinning up the 8" chuck to 3000 with slightly off balances jaws. not scary, but very obviously present
i have pulled off all sheetmetal that slides with the axis to rule it out, removed the servo to hand spin, no shaft play, typical cogging feeling on the magnetic poles.
the servo does get rather hot if you rapid up and down 20 times, and if i use the machine it errors our under far less load than normal.
using a ratchet to jog the axis with servo removed it is not perfectly smooth. thought it never has been, it does not have a consernable effort to turn, but there is knotchy sections. i cannot see this as a source of significant load or vibration.
linier ways and ball screw look fine.
possible ball screw end bearings?
i have nver replaces a ball screw, is "pre tenisioning" after end bearing changes hard to do?
looking for your thoughts. ive owned it 4 years and not had this issue.
not scared to rip and tear.
thanks!