
Originally Posted by
SRT Mike
I am sort-of kind-of looking at a Haas DT-1. I posted a question in the general forum but got no replies...
I machine mostly acrylic. Right now I have a Leadwell V-40 with a 6k spindle. I just mount a 12"x6" block of acrylic on a fixture and machine the back and the front. Most of these parts require 3D profiling on both sides, so my cycle time is 2-3 hours per side. My machine spends 6+ hours per day running 6,000rpm.
I want a fast production machine. Other than plastic I do some aluminum. It is very rare I do anything else - a few times a year if that.
Considering what people are asking for 2-3 year old VMC's (high 30's), it seems I could spend $5k more and get a DT-1 for $45k (if my logic is flawed, please correct me). My questions...
1) It has a 15k spindle. I imagine I could not run it at 15k all day... or can you? How fast can I run that spindle and have it run all day long? A buddy with a 10k spindle on his Excel won't go above 8k for extended periods. Another brand machine salesman says anything over 8k requires a chiller. Whats the straight scoop?
2) One problem I have with the current VMC is the chips flow out the back and into a pan. It's nice because I can clean it off without stopping the machine, but it requires chip removal every 20 minutes or so. I thought I could use an auger. The acrylic chips from my roughing operations are big (like stainless chips from a 1" end mill), from the 3D profiling it's fine. The big chips tend to sink, the little ones sort of float. Will a chip auger help or will it just get clogged up? Anyone use an auger in plastic? Is a conveyor better? My lathe has a conveyor - works perfect. Never used an auger.
3) Anyone got a DT-1? You like it? Can I expect any discount from MSRP?