milling CU - problems

ChrioN · 10-19-2002, 04:13 PM

When i mill, the CU don't fly away, it just move out of the way.
Hmm...hard to explain...some CU fly away, but much gets pushed out of the sides of the endmill.
You know what I mean? Hope so.
Its not pretty at all.

My digicam is not here right now so I can't take a pic

UnaClocker · 10-19-2002, 04:43 PM

That's pretty normal for copper, it's a pita to mill. Do you have a machinist's handbook to look up the speeds and feeds for copper? That'd be my suggestion. Maybe someone who has a copy can reply with the numbers you need.

ChrioN · 10-19-2002, 04:46 PM

morphling has a diagram...well...it sucks to mill CU thats for sure...

jaydee · 10-19-2002, 09:10 PM

Yeah just think what it does to my tiny CNC mill! Have to slow down the feed rate untill the shavings are bigger. Copper bites to mill but I can do it on my mill if I go slow enough with a good endmill.

ChrioN · 10-20-2002, 02:00 PM

Another question: What shall I use to solder with? Silver or regular?

MeltMan · 10-20-2002, 03:30 PM

Doesnt matter too much... I just use plumbing solder.

morphling1 · 10-20-2002, 06:37 PM

How sharp are your bits, looks like the are getting dull (is that the word). If you took new sharp bit this shouldn't be a problem, except like JD said with tiny bits, those are tricky, you need very high rpms.

ChrioN · 10-21-2002, 01:48 AM

I used a 10mm bit, the one I got with the mill, yes its used and maybe quite unsharp.
I think I used very low rpm...dunno...

but the same thing happend with my new 20mm bit...well well

Gnozo · 10-21-2002, 11:23 AM

Hmm....sounds like you need to go higher in your rpm's.....

Take a look at this:

http://forums.procooling.com/vbb/sho...&threadid=4490

Fixittt · 10-22-2002, 10:03 PM

ChrioN email me I think I have something that might help ya

fixittt@cimtel.net

ChrioN · 10-26-2002, 11:39 AM

So, I didn't use any lubrication, so what? It didn't get hot at all.

Here is how it end up like:

this shit stinks. really.

Puzzdre · 10-26-2002, 12:23 PM

Don't despair!
I'm pretty sure that if you have next 10 made, the last one would look much better than this one (btw, this one looks good for a start), just give the patience some time and effort.

Maybe to go in smaller steps while milling, to gain more control on the straight cuts...:shrug:

Keep it up!!!

Fixittt · 10-26-2002, 01:03 PM

Thats copper for ya! Hard as sh!t to machine!! Looks good, once you deburr it!

ChrioN · 10-26-2002, 02:23 PM

HEY! the camera is fooling you!
the channels are COMPLETLY straight!
But what is wrong? You just say that its going to be better.
I can't do it any better if you dont tell me what Im doing wrong!

Im so pissed right now...not at you guys but that everything ALWAYS goes wrong!!!

Puzzdre · 10-26-2002, 02:27 PM

OOOPS, sorry man, I was looking into the pics and picked wrong conclusion. Burred edges lead me to it.
Sorry...

Fixittt · 11-12-2002, 08:40 AM

ChrioN

So hows the machining going? I want some updates to see some progress.

I got the check for my 600 pound manual mill. Should have that by next week

ChrioN · 11-12-2002, 10:04 AM

Hmm..I have posted very many pictures here:
http://forums.procooling.com/vbb/sho...&threadid=4519

But as I did'nt get any responses, I quit.

But if you want more pics in progress i'll gladly post some more!

utabintarbo · 11-12-2002, 11:35 AM

Quote:

Originally posted by ChrioN
Hmm..I have posted very many pictures here:
http://forums.procooling.com/vbb/sho...&threadid=4519

But as I did'nt get any responses, I quit.

But if you want more pics in progress i'll gladly post some more!

Yes.

Bob

Nick C · 11-13-2002, 12:01 AM

I've found that keeping a steady stream of air on the bit (where it's cutting) to blow the chips away helps ALOT with that, so much so infact that I didn't have any burring, melting, or any other problems like that.

ChrioN · 11-13-2002, 02:17 AM

Nick C: I allways do that. Doesn't help though.

utabintarbo · 11-13-2002, 08:12 AM

What params (spindle, feed, stepdown) were you using when you cut that? When I was doing the machining thing a lot, I found that it was usually more efficient to go smaller stepdown, faster spindle and feed. But it depends on your tooling, of course...

Bob

10-19-2002, 04:13 PM	#1
ChrioN Cooling Savant Join Date: Sep 2002 Location: Sweden Posts: 318	milling CU - problems [update with pictures] When i mill, the CU don't fly away, it just move out of the way. Hmm...hard to explain...some CU fly away, but much gets pushed out of the sides of the endmill. You know what I mean? Hope so. Its not pretty at all. My digicam is not here right now so I can't take a pic Last edited by ChrioN; 10-26-2002 at 12:04 PM.

10-19-2002, 04:43 PM	#2
UnaClocker Cooling Savant Join Date: Apr 2000 Location: Bremerton, WA Posts: 514	That's pretty normal for copper, it's a pita to mill. Do you have a machinist's handbook to look up the speeds and feeds for copper? That'd be my suggestion. Maybe someone who has a copy can reply with the numbers you need. __________________ The UnaClocker Watercooler Extraordinaire! Overclock till it goes BOOM!

10-20-2002, 03:30 PM	#6
MeltMan Cooling Savant Join Date: Aug 2001 Location: KS Posts: 374	Doesnt matter too much... I just use plumbing solder. __________________ MeltMan Lurker Supreme!

10-20-2002, 06:37 PM	#7
morphling1 Cooling Savant Join Date: Sep 2001 Location: Slovenia Posts: 468	How sharp are your bits, looks like the are getting dull (is that the word). If you took new sharp bit this shouldn't be a problem, except like JD said with tiny bits, those are tricky, you need very high rpms. __________________ [My ftp, with lots of pics, hope to be home page someday

10-21-2002, 11:23 AM	#9
Gnozo Cooling Savant Join Date: Apr 2002 Location: Denmark Posts: 105	Hmm....sounds like you need to go higher in your rpm's..... Take a look at this: http://forums.procooling.com/vbb/sho...&threadid=4490 __________________ AMD XP1700+ @ JIUHB 12 x 202 Epox 8RDA+ Samsung PC2700 512mb Asus V8420 TI4200 Eheim 1048 - Maze1 - AirPlex EVO240 - Lian Li PC-61

10-19-2002, 04:46 PM	#3
ChrioN Cooling Savant Join Date: Sep 2002 Location: Sweden Posts: 318	morphling has a diagram...well...it sucks to mill CU thats for sure...

10-19-2002, 09:10 PM	#4
jaydee Put up or Shut Up Join Date: Dec 2001 Location: Spokane WA Posts: 6,506	Yeah just think what it does to my tiny CNC mill! Have to slow down the feed rate untill the shavings are bigger. Copper bites to mill but I can do it on my mill if I go slow enough with a good endmill.

10-20-2002, 02:00 PM	#5
ChrioN Cooling Savant Join Date: Sep 2002 Location: Sweden Posts: 318	Another question: What shall I use to solder with? Silver or regular?

10-21-2002, 01:48 AM	#8
ChrioN Cooling Savant Join Date: Sep 2002 Location: Sweden Posts: 318	I used a 10mm bit, the one I got with the mill, yes its used and maybe quite unsharp. I think I used very low rpm...dunno... but the same thing happend with my new 20mm bit...well well

10-22-2002, 10:03 PM	#10
Fixittt CNC Beyatch Join Date: Aug 2001 Location: Tulsa Spell it backwards Posts: 721	ChrioN email me I think I have something that might help ya fixittt@cimtel.net __________________ Creator of the Spir@l Block Longest post ever http://forums.procooling.com/vbb/showthread.php?s=&postid=43808#post43808

10-26-2002, 11:39 AM	#11
ChrioN Cooling Savant Join Date: Sep 2002 Location: Sweden Posts: 318	So, I didn't use any lubrication, so what? It didn't get hot at all. Here is how it end up like: this shit stinks. really.

10-26-2002, 12:23 PM	#12
Puzzdre Cooling Savant Join Date: Aug 2002 Location: Croatia Posts: 969	Don't despair! I'm pretty sure that if you have next 10 made, the last one would look much better than this one (btw, this one looks good for a start), just give the patience some time and effort. Maybe to go in smaller steps while milling, to gain more control on the straight cuts...:shrug: Keep it up!!! __________________ 'Out of cheese error... ...please reboot the universe (press the GBL to continue)'

10-26-2002, 01:03 PM	#13
Fixittt CNC Beyatch Join Date: Aug 2001 Location: Tulsa Spell it backwards Posts: 721	Thats copper for ya! Hard as sh!t to machine!! Looks good, once you deburr it! __________________ Creator of the Spir@l Block Longest post ever http://forums.procooling.com/vbb/showthread.php?s=&postid=43808#post43808

10-26-2002, 02:23 PM	#14
ChrioN Cooling Savant Join Date: Sep 2002 Location: Sweden Posts: 318	HEY! the camera is fooling you! the channels are COMPLETLY straight! But what is wrong? You just say that its going to be better. I can't do it any better if you dont tell me what Im doing wrong! Im so pissed right now...not at you guys but that everything ALWAYS goes wrong!!!

10-26-2002, 02:27 PM	#15
Puzzdre Cooling Savant Join Date: Aug 2002 Location: Croatia Posts: 969	OOOPS, sorry man, I was looking into the pics and picked wrong conclusion. Burred edges lead me to it. Sorry... __________________ 'Out of cheese error... ...please reboot the universe (press the GBL to continue)'

11-12-2002, 08:40 AM	#16
Fixittt CNC Beyatch Join Date: Aug 2001 Location: Tulsa Spell it backwards Posts: 721	ChrioN So hows the machining going? I want some updates to see some progress. I got the check for my 600 pound manual mill. Should have that by next week __________________ Creator of the Spir@l Block Longest post ever http://forums.procooling.com/vbb/showthread.php?s=&postid=43808#post43808

11-12-2002, 10:04 AM	#17
ChrioN Cooling Savant Join Date: Sep 2002 Location: Sweden Posts: 318	Hmm..I have posted very many pictures here: http://forums.procooling.com/vbb/sho...&threadid=4519 But as I did'nt get any responses, I quit. But if you want more pics in progress i'll gladly post some more!

11-13-2002, 12:01 AM	#19
Nick C Cooling Neophyte Join Date: Sep 2002 Location: OREGON Posts: 62	I've found that keeping a steady stream of air on the bit (where it's cutting) to blow the chips away helps ALOT with that, so much so infact that I didn't have any burring, melting, or any other problems like that.

11-13-2002, 02:17 AM	#20
ChrioN Cooling Savant Join Date: Sep 2002 Location: Sweden Posts: 318	Nick C: I allways do that. Doesn't help though.

11-13-2002, 08:12 AM	#21
utabintarbo Cooling Savant Join Date: Jul 2002 Location: Sterling Hts., MI Posts: 496	What params (spindle, feed, stepdown) were you using when you cut that? When I was doing the machining thing a lot, I found that it was usually more efficient to go smaller stepdown, faster spindle and feed. But it depends on your tooling, of course... Bob __________________ Sarcasm is yet another of the free services we offer!

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