Welcome, Guest. Please login or register.
Did you miss your activation email?
September 30, 2014, 05:10:13 AM

Login with username, password and session length
Search:     Advanced search
* Home Help Search Calendar Links Login Register
  Show Posts
Pages: « 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 »
561  Mach Discussion / General Mach Discussion / Re: Making a list of things that need fixed in Turn on: January 04, 2011, 02:10:21 PM
Actually, none of the G81 to G89 canned cycles are implemented.

Also, G77 and G78 are not implemented, although appear in the manual.

Dan
562  Mach Discussion / General Mach Discussion / Re: Making a list of things that need fixed in Turn on: January 04, 2011, 02:07:10 PM
Also the G73 High Speed Peck Drill Canned Cycle.

Tool Path display.

Spindle Override..? What's wrong with it? Seems to work here...

Dan
563  G-Code, CAD, and CAM / G-Code, CAD, and CAM discussions / Re: Milling parts from end of stock on: January 01, 2011, 02:15:02 PM
Just to add up to what Rich and Dave said about carbide end mills. Avoid hand spraying with carbide tools as the fast temperature drop may chip them.

Dan
564  G-Code, CAD, and CAM / G-Code, CAD, and CAM discussions / Re: Milling parts from end of stock on: January 01, 2011, 11:41:12 AM
Russ,

Good evacuation of chips is certainly desirable. I haven't investigated how they effect the tool life, but they sure cause an awful noise if not evacuated to clear the cut. Just hearing that noise makes you think it's going to break the cutter, so haven't had the courage to leave it like this for more than a few seconds Wink

Dan
565  G-Code, CAD, and CAM / G-Code, CAD, and CAM discussions / Re: Milling parts from end of stock on: January 01, 2011, 09:10:49 AM
Hi Russ,

Looks good.

If machine rigidity is not a problem, these end mills should do fine up to depth of 1/2 their diameter cutting full width.

If you can get a deal on some roughing end mills it would save you some money on the finishing ones which you want to keep sharp. Also roughing end mills can go as deep as their diameter on a full width cut. Carbide are best and are a good investment, especially when you have no coolant.

Dan
566  General CNC Chat / Show"N"Tell ( Your Machines) / Re: CNC Large Lathe Conversion pictures on: December 30, 2010, 02:17:25 AM
Ah... OK. That makes sense. I was bothered with the Z axis as I said. Being 2.5" diameter, I see no problem Wink Somehow I missed you saying the Z was 2.5" and it was only the X with the 0.75".

Dan
567  General CNC Chat / Show"N"Tell ( Your Machines) / Re: CNC Large Lathe Conversion pictures on: December 29, 2010, 05:06:24 AM
Nice little lathe Wink Amazing how well it's preserved. It's 70 years old and looks better than some 10 years old machines I've seen.

0.75" diameter ball screws..? Sounds to small for a lathe that will cut 15mm per pass. Would expect twice that. At least for the Z.

Dan
568  G-Code, CAD, and CAM / G-Code, CAD, and CAM discussions / Re: Milling parts from end of stock on: December 29, 2010, 02:02:39 AM
Oh... one more thing. I am not sure how it works with G41/G42 offsets, so be careful if you're using them. Sometimes G41/G42 offsets don't like offseting of the coordinate system.

Dan
569  G-Code, CAD, and CAM / G-Code, CAD, and CAM discussions / Re: Milling parts from end of stock on: December 29, 2010, 01:59:47 AM
Hi Terry,

Good idea as always! I like your productivity.

Russ, do as Terry suggests for a stock you have and then it is fairly simple to tweak the G-code to accommodate for future stock changes. Let's say you do your G-code for a 4" wide stock - bottom parts aligned with the bottom edge, top parts aligned with the top edge. Be sure you first cut all the bottom parts and the move to cutting all the top parts. Let's assume next time the stock you get is 4.1" wide. You align the bottom edge of the material with the bottom parts' edge and the bottom parts are fine. Now the problem is with the top parts. Use "G52 Y0.1" before the code for the top parts. It will offset the coordinate system by that amount. Program "G52 Y0" in the end to cancel it.

Dan
570  G-Code, CAD, and CAM / G-Code, CAD, and CAM discussions / Re: Milling parts from end of stock on: December 28, 2010, 11:53:15 AM
What is the hole size? If it's big enough to put a substantial bolt in it (like 1/4"), then you're good. Bolt the stock down to a sacrificial plate (use enough for a pair like Sam suggested - you will have two bolts holding the stock), using the holes, then mill the profile leaving about 0.01" for the last pass - it is enough to hold the stock, but yet not to much to develop large cutting forces on the last pass, so the single bolt per part should handle it fine. Just tighten it firmly.

Dan
Pages: « 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 »
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!