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Messages - BobWarfield

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21
General Mach Discussion / Re: Combine G73 and G83 Peck Drill Cycle!!
« on: July 04, 2010, 12:13:10 AM »
Too many rpm, too much feed for HSS in stainless.  A quality HSS twist drill from Dormer is recommended to run at 50 SFM or so.  You're running at 82 SFM.  You want to slow down even from the recommended for the deep hole, and if you're not using a quality twist drill.

Try the figures I recommended above.

Best,

BW

22
General Mach Discussion / Re: Combine G73 and G83 Peck Drill Cycle!!
« on: July 03, 2010, 03:17:04 PM »
Bob...I tried HSCO, HSS and Carbide drills so far... HSCO and HSS  gives me almost the same results. No good luck with HSco... I wonder how peoples drill 1000 of holes in SS without sharpening the bit???
 My strategy is...For every 10th hole i have to pause the machine and sharpen the drill...Currently only using HSS...:)


http://www.youtube.com/watch?v=FH2X_W2MHBY&feature=email

Khalid, 65mm is a pretty deep hole with a 10mm drill.  Nevertheless, it should be doable.  Your enemy will be work hardening on stainless (most alloys, anyway).  Because of that, you need to keep the feedrate up, correct spindle speed, and plenty of coolant.  I don't what your spindle and feedrates are, but G-Wizard would go with 280 rpm and 30 mm/min feedrate.

Be sure you don't let the twist drill dwell or stop feeding while in contact with the stainnless.

It's pretty tough to do a lot of holes in stainless without carbide.  With a carbide bit, you could run 1100 rpm and 145 mm/min feed.

Cheers,

BW

23
General Mach Discussion / Re: Combine G73 and G83 Peck Drill Cycle!!
« on: July 03, 2010, 12:19:05 PM »
+1 on the Cobalt bit if you have a lot of stainless.  Could even be worth a carbide twist drill.

Cheers,

BW

24
I think it winds up being more a question of who has the big unused pile of scrap shells rather than saving money!

Cheers,

BW

25
Those rotary patterns are cool.  I assume they're mostly for jewelry (rings) you guys are doing?

I'd love to get some simple g-code to play with if any of you are willing to post.  I just want to run it through my g-code simulator and play with changing the codes.

Cheers,

BW

26
General Mach Discussion / Re: External Button for Auto Tool Zero
« on: May 27, 2010, 12:14:52 PM »
I love this idea of a button!

Would look great in a little panel on the head next to the powered drawbar "In" and "Out" switches:

In
Out
Zero

I'll have to give that some thought.  Definiitely worth waiting for Mach 4 as the new functionality for tool tables would likely support it better.

Cheers,

BW

27
Something about these cubes. I can't get them out of my head.

They are mesmerizing, eh?

I showed mine (the avatar at left) to my wife and she has kept it on our Kitchen island as a kind of centerpiece, since.  She wants a small highly polished one on a chain as a pendant, so I'll be looking into that as her birthday gets closer.

Cheers,

BW

28
Well, I wish I knew that before I bought my PC.

Of course, with the missleading information in the misslabeled "minumum requirements" section of the ArtSoft home page, how was I to know that "32 bit version" is actually a maximum unlike the other things listed like Ghz and RAM that are truly minimums.

If I only knew then what I knew now...........

The language says:

◦32-bit version of Windows 2000, Windows XP, Windows Vista, or Windows 7 Operating System

What did you really want it to say different?  Seems pretty clear and unambigous. 

RE Smoothstepper and similar boards, what's probably not clear to a lot of people is that Windows is systematically making it harder and harder to support the parallel.  It's pretty well hacked into the architecture.  Over time, it may get harder until someday it is impossible.  I have 32-bit programs today that won't run in Win 7 32-bit, for example.  So, however much we may like the low cost of parallel ports (and the reliability with Mach3), they're a dying breed.  How long will it be?  Who knows?  Forever if you are prepared to buy old PC's and Windows XP off eBay.  But, some people don't want to deal with that for whatever reasons.  So there needs to be some better answer over time.

The specific problem with products like Smoothstepper is they seem to reach a point where interest wanes, they are less well supported, and people start to wonder about them.  Sometimes they die because of it, ala GRex.  Sometimes it is just annoying.  Smoothstepper, from my perspective, it closer to annoying than dying, but despite having one, I am not sure I can recommend them wholeheartedly because of this uncertainty over their support.  Someone needs to finish one so it has all the Mach3 features like backlash comp and then support it well.  If it isn't a big enough seller to keep the developers happy, then I wish they'd build more products so they could afford to working on Mach-related products or merge with another company that can help.  I've suggested Gecko in the past, but a company like CNC4PC would do fine as well. 

In the end, what's on the little microcontroller is just not that complex as software.  Someone will figure it out and we'll have it.  Heck, there are now people putting whole g-code interpreters into the Arduinos. 

Cheers,

BW

29
G-Code, CAD, and CAM discussions / Re: Tapered Pocket
« on: May 27, 2010, 10:54:27 AM »
Smaller balls and smaller stepover.  Starts to take a long time though!

Best,

BW

30
That's kind of entertaining.

Although, if you're willling to stick the part in the spindle instead of a 4th axis, the table makes one heck of a gang slide!   :o

Cheers,

BW

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