Originally Posted by
cncfun1
Hi Mactec54, thanks for getting back to me. I will try to address each of your points
1) Bad Fitting tools: I assume you are referring to the tool holder spindle fit, Note that the spindle and tool holder are practically new with very little run time, The tool holder is a good quality and made by Regofix, the accuracy of the spindle taper is unknown, we tried the bluing test and it appears to be OK, but I would not have allot of experience looking at these results.
2) Not enough pull to hold the tool in the spindle: The pull force was was increased to approx 900N, the spindle manufacture says that if we go any higher they are concerned about tool holder mechanism not functioning properly, do you think this is high enough pull force?
3) Dirty Tools or Spindle: We where very carefully in cleaning the tapers on the tool holder and spindle.
4) Out of Balance Tools: we don't really have a way to check this, do you know anyway of checking this?
5) Too much cutting force / load: This could be problem, we could try lowering MRR and see if that reduces the fretting. Also do you know if having a different ratio for DOC to WOC would make a difference, for example the cuts we where doing where DOC=5mm, WOC=3mm if we changed it to DOC=10mm and WOC=1.5mm, would that help?
6) Incorrect cutters for the job: The tools selected where specially designed for Aluminium so i think we are OK in that department.
Since the spindle quality is unknown we where wondering if the hardness of the taper might be an issue. Do you think that could cause an issue?