The Wizard calculator was even telling me 1.5 to 2mm roughing, which also did not work? How are guys coming up with these numbers? - are there any tables that actually talk about cut depth. I think 2mm with the x/z mounts tightened shouldn't be an issue.įinch wrote: I can see a lot of guys using 0.2 to 0.3 mm cut depths on a 3mm bit, which is nothing like the 1/2 diameter Rule of thumb. The HF spindel motor was warm/hot to the touchĪt the moment - the rigidity of the machine seems to be the big limiting factor.
The workpieces and end mill temperature were checked immediately following the cut, and both were cold to the touch. Piece secured firmly, however still small play in X axis mount, causing small occasional vibrationĢ0,000 rpm 100mm/min 2.0mm Depth Cut noise, workpiece vibration + play in mount cause wobble and Jam - cut terminated Piece now secured firmly, cut ok, " normal noise + small vibration from loose Z axis to X AXIS MOUNT Suspect poorly bolted down work piece caused chatter + path wander and jam.
20,000 rpm produced the quietest and "easiest" cut.Ģ0,000 rpm 150mm/min 0.5mm Depth Ok Some Cut noiseĢ0,000 rpm 100mm/min 1.0mm Depth Ok More Cut noise + Vibration noise 6mm end mill Carbide 4 flute upcut.ģ,000 RPM 150mm/min 0.1mm Depth Ok Cut silentĥ,000 RPM 150mm/min 0.2mm Depth Ok Cut Slightly vibrational noiseġ0,000 rpm 150mm/min 0.2mm Depth Ok Cut Less vibrational noiseĢ0,000 rpm 150mm/min 0.2mm Depth Ok Cut silent.
Probably not all that useful for wood cutting routers or other really soft materials where tool load isn't very high.So I did some basic testing on unknown aluminium, starting with varying RPM, then cut depth, and havn't gotten to varying feed rates, but that will be next. Very fast, chips clear extremely well, no bogging or loading the cutter up. Repeat the stepdowns until I'm through and do a cleanup contour. I ramp down 2-3 degrees (steel) to about 10% of the tool diameter and walk around the profile. I slot with a DOC a bit less than the nose radius and a very high chipload/IPT.
I've switched to full width slotting in some of those cases (say, profiling a part) as I can use a bullnose endmill like a poor-man's high feed mill. Using a wide cutter to slot/pocket ratio means a million tiny moves - not efficient. There are some times when trochoidal is not really appropriate. I generally use 7% WOC stepover (hard steels/alloys) up to 30% (aluminum, plastics) with full flute length. Instead of multiple depths with a large WOC at slow speed, trochoidal permits high speed at full (or increased) depth. In addition, the constant (mostly) load on the end mill means you can take full depth cuts pretty safely. It's really useful for clearing out corners without plowing in and having the tool suddenly taking a 270 degree bite. You can even reduce the chip load on the conventional moves while still keeping the feed up during climb cutting. Sort of a back and forth saw-tooth pattern while still keeping the tool engagement angle appropriate. F360 recently introduced "both-ways-adaptive" which cuts climb and conventional. Some have an option to lift the tool during the non-engaged moves.
There are subtle differences between CAM software - some do a simple circle, some make a "D" shape. Watching some youtube videos indicates Esprit CAM calls it "Profit Milling" (snort).
Fusion360 calls it adaptive or adaptive clearing. It's very helpful for those of us with low-power, low-rigidity milling machines using smaller cutters.īTW, there are many trade names for this type of toolpath. Robertspark wrote:which I must admit I've never come across.