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New Doosan DEM 4000
My reason for being interested in this question, not that it should require justification, is that I have been considering the various Doosan machines for my next purchase. I can't access the catalogs because I don't consent to Doosan's privacy policy, so who knows what information those...- prime_mover
- Post #42
- Forum: CNC Machining
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New Doosan DEM 4000
The 3D surfacing question is relevant for anyone considering this machine, who will on occasion need to do 3D surfacing. Anyone buying any machine cares about the performance capability. "Commodity level machine?" If by commodity you mean "anything which may be bought or sold," then yes, as is...- prime_mover
- Post #40
- Forum: CNC Machining
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New Doosan DEM 4000
To test the 3D surfacing capability you'll need to machine some organic geometry and use small tolerance values so that the code flies by. This will allow you to determine where the limits are. If the machine can't keep up it may vibrate in a noticeable way as it stutters on the code, or exhibit...- prime_mover
- Post #33
- Forum: CNC Machining
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New Doosan DEM 4000
Sounds like a pretty major fundamental design issue on multiple machines. Did DN-S sub contract to Haas engineering for this one?- prime_mover
- Post #28
- Forum: CNC Machining
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New Doosan DEM 4000
Awesome. Let us know how the DEM 4000 performs with 3d surfacing.- prime_mover
- Post #21
- Forum: CNC Machining
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Haas Super Mini Mill VS DEM 4000
That's great you've got gurus to calibrate your machines, but for everyone else, they're going to get witness marks on their parts. I'd wager that you do as well, you just don't notice them. Look at the corners or quadrants under magnification. See if the scallops are perfectly consistent like...- prime_mover
- Post #16
- Forum: CNC Machining
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Haas Super Mini Mill VS DEM 4000
Therein lies the rub, maybe.- prime_mover
- Post #14
- Forum: CNC Machining
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Haas Super Mini Mill VS DEM 4000
That's great to hear Miller846. You buy a Haas, it gets put on your floor, Haas comes in and sets it up, and you run it: But over the years I have come up with several toolpath strategies to eliminate these marks: I can even do edge breaks of .001" without any discernible difference in the...- prime_mover
- Post #12
- Forum: CNC Machining
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Haas Super Mini Mill VS DEM 4000
I don't have a super mini, just a regular mini from 2013, but I've ran many Haas VF mills over the years including a recent brand new VF4. A problem with Haas mills in general, regarding part quality, is that they leave small witness marks on parts whenever the axes change directions, so at the...- prime_mover
- Post #9
- Forum: CNC Machining
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Grease discontinued. Switching way lube to oil?
I almost forgot I was cycling it that frequently to ensure that the bubble in the grease line was moving. That's the line that seemed clogged upon inspection.- prime_mover
- Post #26
- Forum: Haas
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More new Haas issues.....
I'll take you up on that bet, and bet they built it so that it self destructs.- prime_mover
- Post #43
- Forum: Haas
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2 New Haas Machines and ???
My coolant recommendation would be to use a "full synthetic," or other totally bio-hard coolant, to avoid ever having the sump go foul. You really can't have your coolant go foul in your situation. It's a tedious multi-step process to get the sump clean again, and it's probably just going to...- prime_mover
- Post #19
- Forum: Haas
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More new Haas issues.....
It doesn't really matter what coolant you use, the galvanized covers will still corrode. And then the coating becomes a sticky gooey mess and aluminum chips weld themselves to it and the welded chips destroy the wipers pretty much immediately. The only fix, I think, is to completely remove the...- prime_mover
- Post #32
- Forum: Haas
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Grease discontinued. Switching way lube to oil?
I also have a 2013 Haas with the red grease. I would advise changing the auto lube interval to a much smaller value than the default which is like a million hours. My machine used 1/4 of one grease canister in 6 years.... These days I go to the lube page and hit F2 every day or two to cycle the...- prime_mover
- Post #24
- Forum: Haas
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Grease discontinued. Switching way lube to oil?
Haas is so bad at engineering that they can't design a proper grease system after decades of experience, and with all the help in the world from grease manufacturers being a phone call away, and with all of the other machines in the history of the world available as a reference. Maybe the grease...- prime_mover
- Post #18
- Forum: Haas
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What happened to the HAAS HRC roller cam rotary tables?
None of the current models appear to be roller cam. The backlash specs are the same between all of them. Aren't roller cam rotaries zero backlash? Sankyo et al.- prime_mover
- Post #4
- Forum: Haas
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3D Printed Hose Attachment for HAAS Spindle
Nice work. I'll suggest adding a hinge to the mounting bracket, then you won't have to bend the smaller hoses to move them for a tool change, just tilt the whole apparatus out of the way.- prime_mover
- Post #2
- Forum: Haas
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burrs when milling 304 stainless
Usually breaking up the cut into multiple depths or multiple passes can do the trick. Even a strategy like a left hand spiral end mill coming from one side and a right hand spiral from the other is the kind of thing that could work. You might try a plunge cut on either side where the break thru...- prime_mover
- Post #17
- Forum: CNC Machining
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burrs when milling 304 stainless
Use drills, taps, and cutting tools designed for stainless.- prime_mover
- Post #16
- Forum: CNC Machining
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GrabCAD Workbench end of life June 1st, 2023
If by HD you mean usb stick. That is, unless you need to carry terabytes of data around.- prime_mover
- Post #10
- Forum: CAD / CAM