Messages

711

Show"N"Tell ( Your Machines) / Re: AL54b (lathe) project from New Zealand

« on: December 24, 2010, 09:40:48 AM »

Never said it was not going to work It's just not the common way to do this - press fitting a bearing in a sectioned housing...

Yes, we'll know soon how it works out. I guess no one has done this before, so your experience may help others. If anything, the biggest problem is going to be when using a 3mm part-off tool in alloy steel 30mm in diameter.

Dan

712

Show"N"Tell ( Your Machines) / Re: AL54b (lathe) project from New Zealand

« on: December 23, 2010, 03:18:12 PM »

Hi,

1. my slide comes all the way out over the motor so unless i mount the motor backwards ill never have the room.

I know. I think it is worth considering.

2. the original mount is way to small for the new bearings.

Was suggesting to use the concept. Not the same mount.

I disagree as long as you have good bulk on ether side of the bearing your just not going to apply enough pressure to the bearing collar to get it to deflect, the inside has 200mm of cast iron slide and the outside had 30mm of Ali, im exposing probably less that 1/3 of the bearing which is hardened steel, the motors will give out or the belts will break before there is any significant deflection.

comments anyone with more experience?

cheers

It all comes down to the final rigidity of the machine. Motors and belts don't give you rigidity. Frame construction, mounts, bearings, slides and screws do. Your setup may and probably will work fine, but will be far less rigid than a proper steel mounting blocks. Depends on what you intend to be using the lathe for I guess.

Dan

 

713

Show"N"Tell ( Your Machines) / Re: AL54b (lathe) project from New Zealand

« on: December 23, 2010, 02:39:47 PM »

Why didn't you use the original X screw mount extension concept? Not the most rigid setup to have the bearings exposed like this and in an aluminium block. It does look creative though

Dan

714

Show"N"Tell ( Your Machines) / Re: AL54b (lathe) project from New Zealand

« on: December 23, 2010, 01:06:02 AM »

Had this happen several times over the last few days. I am sure it is being worked on though.

Dan

715

Show"N"Tell ( Your Machines) / Re: AL54b (lathe) project from New Zealand

« on: December 22, 2010, 04:29:01 AM »

Looking good! What a pleasant surprise that the new bearings block and the original one align on same plane.

What accuracy grade are the ball screws?

Dan

716

Works in progress / Re: 3 PAGE LATHE SCREEN - WIZARD ADDITIONS

« on: December 22, 2010, 01:15:14 AM »

The issue with zstart being swapped was never an issue. I think he was just looking at it wrong or something?

Correct. Was my mistake.

Haven't had a chance to mess with the OD Arc3 some more, but, as reported from the few tests I did, there was an issue in diameter mode.

Dan

717

Show"N"Tell ( Your Machines) / Re: AL54b (lathe) project from New Zealand

« on: December 16, 2010, 02:04:23 PM »

The sheet metal shop we work with would cut it and CNC fold it to the drawing and the prices are so low (most of the price is the laser cutting) it makes it not worth messing with folding it manually, even if it's a simple bend. Ask your laser shop if they can bend it. Only adds up something like 2 bucks for a bend.

Dan

718

Show"N"Tell ( Your Machines) / Re: 1987 Bridgeport Production Center Interact 412 to Mach3 Conversion

« on: December 16, 2010, 05:26:08 AM »

Will revisit this idea some time...

Dan

719

Show"N"Tell ( Your Machines) / Re: 1987 Bridgeport Production Center Interact 412 to Mach3 Conversion

« on: December 16, 2010, 04:28:48 AM »

Hood,

Thought the above probe was self contained and not just a piece of metal that would close the circle through the part and mill table...? I would like to be able to probe plastic parts as well. I have an idea how to make one, but a cheap commercial one sounds easier

Dan

720

Show"N"Tell ( Your Machines) / Re: AL54b (lathe) project from New Zealand

« on: December 16, 2010, 03:16:59 AM »

Coming along nicely! Time to get it painted...

Dan