New CNC up and running, Need some G-code

[HogKiller]

You may wish to check out http://www.destinytool.com/. They make carbide endmills here in the valley. One of them seriously reduces chatter. They also make chamfer mills, when I worked there for a bit they made lots of custom cutters, I was one of the designers. Worked as a tool & cutter grinder for 35 yrs.

[VaderSpade]

First lower (in the CNC).

[darmog]

You may wish to check out http://www.destinytool.com/. They make carbide endmills here in the valley. One of them seriously reduces chatter. They also make chamfer mills, when I worked there for a bit they made lots of custom cutters, I was one of the designers. Worked as a tool & cutter grinder for 35 yrs.

+1 for Destiny Tools..MA Ford also makes great cutters and keeps the money local.

[grymster]

Nice, Vader. Lotta chatter there, though. Might try decreasing spindle speed and increasing feedrate.

[heycorey]

VaderSpade, can I ask what type of jig your using to hold the receiver?

[Lostsheep]

You may wish to check out http://www.destinytool.com/. They make carbide endmills here in the valley. One of them seriously reduces chatter. They also make chamfer mills, when I worked there for a bit they made lots of custom cutters, I was one of the designers. Worked as a tool & cutter grinder for 35 yrs.

x3.

Nice, Vader. Lotta chatter there, though. Might try decreasing spindle speed and increasing feedrate.

x2

VaderSpade, can I ask what type of jig your using to hold the receiver?

That looks a lot like my tactical machining jig, but I reserve the right to be wrong.

[VaderSpade]

Thanks for the tips guys.

The program called for a 3 flute and I used a 4, Also I had about 5/8 of an inch more of the end mill sticking out of the collet then I needed for clearance.

I plan to order some 3 flute end mills tomorrow and shorten the tool.

Feed rate seems damn fast to me as it is. Definitely faster than I ever feed anything with my manual mill (welcome to the CNC world)!

The coolant pretty much prevented me from seeing what was happening. I sat with my finger on the mouse hovering over the STOP icon. No real chatter sound (as I know them from my manual) but it was howling.

Nice, Vader. Lotta chatter there, though. Might try decreasing spindle speed and increasing feedrate.

[VaderSpade]

Yes TM jig.

[Lostsheep]

Thanks for the tips guys.

The program called for a 3 flute and I used a 4, Also I had about 5/8 of an inch more of the end mill sticking out of the collet then I needed for clearance.

I plan to order some 3 flute end mills tomorrow and shorten the tool.

Feed rate seems damn fast to me as it is. Definitely faster than I ever feed anything with my manual mill (welcome to the CNC world)!

The coolant pretty much prevented me from seeing what was happening. I sat with my finger on the mouse hovering over the STOP icon. No real chatter sound (as I know them from my manual) but it was howling.

I'm curious, what was your feed,speed, and doc? HSS or carbide?

[grymster]

5/8" is way too much. Leave just enough.... maybe .030 to .050. I'd go with a two flute, before a four flute, but a good three flute is about ideal for this kind of work.

[VaderSpade]

5/8" is way too much. Leave just enough.... maybe .030 to .050. I'd go with a two flute, before a four flute, but a good three flute is about ideal for this kind of work.

Ya, I knew that, just too many things to think about the first time around.

Three flutes ordered. Thanks

[grymster]

I'm impressed. Looks like you just about have it down. Machine and set-up rigidity, plus proper cutters, feeds and speeds running on a good toolpath will make good parts.

[yari]

remember the 50% rule. never go past half the dia. of cutter on any cut. you will love the 3 flute EM. odd number of flutes=less chatter, reduces harmonics. are you climb milling? .010 finish pass?

[ott1]

2 flute for aluminum and there's way too much coolant.

[yari]

2 flute for aluminum and there's way too much coolant.

hows that? more coolant more better. you want it to flush the chips away.