Messages

301

General Mach Discussion / Re: Mach Conv. Candidate ?

« on: November 12, 2008, 02:05:21 PM »

Well worth $700.

Ed

302

General Mach Discussion / Re: Z AXIS KNEE

« on: November 08, 2008, 09:45:04 PM »

Ron G,

Very interesting web site you have. I like seeing neat workmanship, and its there.
I have plans for a 9 cyl radial engine, and some others I picked up at a model engine show in Detroit a few years ago,
but theres just not enough hours in a day. Need to get the Hyster done first.

Ed

303

General Mach Discussion / Re: Z AXIS KNEE

« on: November 08, 2008, 09:31:12 PM »

LOL   

600-800 ipm.? That's about the speed Britts leg was at when she put her foot up me arse.
But as far as seeing her knee goes. NO . It's somewhere under all the hair.

But, as far as using the knee for tool length comp, that's a whole different story.

Ed

304

General Mach Discussion / Re: Z AXIS KNEE

« on: November 08, 2008, 06:34:23 PM »

Hey Brett

Lets hear about it.

Britt

305

General Mach Discussion / Re: Z AXIS KNEE

« on: November 08, 2008, 06:14:42 PM »

Ray,

Glad     your happy, Just make sure that knee Gib is properly adjusted. with the knee clamp off , and well lubricated. with 20w way oil.
If your happy with the Z rapids , That's a good thing, But I'm sure others will tell you it will wear after time. OIL-OIL- OIL.

Best of Luck
Ed

306

General Mach Discussion / Re: Z AXIS KNEE

« on: November 08, 2008, 12:06:19 AM »

Chip,

I,ve seen lots of series 2 ,but none with the knee servo'd. Got a pic? Kneed to see one.
What ipm rapids do you get?
I,m not saying there not good. I'm saying you won't get the rapids you get on a quill. Can you get 100 ipm?
If you do lots of drilling, peck drilling, 50 ipm rapids just don't cut it.

Ed V

307

General Mach Discussion / Re: Z AXIS KNEE

« on: November 07, 2008, 11:21:12 PM »

Ray,

Your saying; " But for now, the knee works beautifully."
That's not what your saying on the other forums. 25 IPM.? I use higher feeds.

I have 40 taper tooling, and the extended holders are no problem, not even for roughing.
 I Only use a drill chuck for center drill. I use collet holders for drills.

Good Luck

Ed V

308

General Mach Discussion / Re: Z AXIS KNEE

« on: November 07, 2008, 10:37:51 PM »

LOL   

  I knew there'd be some feed back on this. 

Hood, the series 2 Bridgeport is 5" quill travel. With a crank on the knee. If there is one with the knee travel, I'd like to see it.


Ray, like I said in my first post, it's how you set up your tooling. I can use a .187 b end mill and a .5 drill and machine a 5" high block.
Put the small end mill in an extended holder, to keep all your tools close to the same oa  length , which is best in any setup. Keep your longest tool as short as possible,
and keep all tools as close to that length. Saves wasted, and excess z travel. This does call for some very good holders .

Ed V

309

General Mach Discussion / Z AXIS KNEE

« on: November 07, 2008, 07:00:26 PM »

I'm seeing lots of post on other forums about using your knee for your Z.
The knee mill is not designed for it, you crank it to your desired height and lock it. That's the way it's intended.

I've never come across a job I couldn't do with 5" or 6" travel in the quill. Some jobs I have 10 tools set up. It's all
in your tool setup. You will need some extended tool holders for your shorter tools.
Unless, of course ,  you want to bore out your big block Chevy.

The knee mill uses an acme screw and miter gears to move that knee. When you do a peck drill cycle , you are raising havoc on those parts.
You will never get the speed that you get from your quill.  Check any knee mill with some use what happens when you unlock the Knee. It will sag.

A bed mill ,where the whole head moves up and down ,has a counter weight,which is usually inside the casting, and runs on ball screws, no miter gears needed.

Wheather you add air cylinders, gas shocks, or whatever, you'll never get the speed, you get from your quill.

Compare the weight of the head on  a bed mill to the weight of your knee, with saddle and table, and / or vise and part , all sitting on top an acme screw and miter gears.

I WOULDN'T do it, but , then again, it's your machine. Build it the way you want it.
 
besides all, Gecko doesn't make a drive big enough for a servo big enough to do it.

Ed  V

310

General Mach Discussion / Re: Peck Drilling

« on: November 05, 2008, 01:56:46 AM »

Ray,

  do you have some sort of assist on your knee ? Air? Curios.

Ed