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Thanks Geof! I always enjoy reading posts from you and a few others. They're very insightful. I don't think you'll from me, that you've gone and said too much! haha. So feel free to say as much as...

I'd just like to thank everyone who's given their opinions and suggestions so far. I apreacite all of it.

Geof. if you're willing, I'd really like to hear more from you. Here or PM if you'd rather...

By all means geof, preach away! :)

Personally. I would LOVE to handle this all on my own. I'm very confident that I'd be able to make it all work. Marketing, sales, customer service, design, R&D,...

You guys are right.

I still do not like the thought of some venture capitalist having major control of the business. It is however unrealistic to think that someone who's putting down majority of...

Hi Geof. I understand how they work. Its why I find them unappealing as much as I do. I don't feel they'd hold the same values in respect to the business the way I would, if they had majority...

Thanks for the replies from everyone so far.

HuFlungDung - There have been small companies with investors in the industry. The problem is those small businesses(With great products and ideas)...

I will be starting a new business within the year. My main concern right now is I have a lot of prototype work needing to be done. One assembly could easily see 20+ parts. And when I have 5+...

hey guys. Just thought's I'd keep you updated. I'm very busy right now getting things done with moving. So I haven't had any time to work any more on this. I still plan to but not until I've got...

To my surprise. After applying the load to where it would be in use and with a load of 2000N the displacement is still only one tenth!!!
...

The bearings for the tool changer will be A/C bearings. I'll only see about 8kN needed for the bearings with a FOS of 10. But since I want something far heftier as who knows what someone else might...

Yeah, hopefully.

I thought about the gang slide. And since its all design for now, there's no reason it cant be. But at least for my purposes. I will need a tailstock and steady rest since I'll be...

Here's a stress test of the head and shaft with 800N applied. This is almost double what its going to see in use. And only moves one tenth(average). This was worst case scenario of all the force...

Hey guys. I've decided to embark on my own lathe design along with a tool changer which I'll eventually build. What really pushed me to start this on my own was watching S_J_H and JH-Q's small lathe...

All links are working fine for me. And when this was first posted. :) Not sure whats wrong. Be sure to scroll down and choose which video to watch.

If you click the highlighted link. You'll download the files. You'll get SW files, DWG's and SAT's. The SW ones didnt work for me. But I could open the drawings just fine.

Dont need to know German...

I sure don't understand it, but sounds cool!!

Sub'd

Another tool changer plan can be found here at http://cnc-projects.de/. Click on the link that mentions "CNC-Revolver". I'll be using a modified version of this.

Belding, I think I love you. lol Thanks for the link. Its great!

Anyone else use this link and can say about how accurate this is? I know its only rough figures but if its pretty close to the real...

Thanks!! I'll definitely give them a look too. I didn't really find much at SKF other than theory. But maybe I want looking in the right spot.

In searching for more detailed info on bearings. I came across a guide at NSK that went into way more detail than I've seen at other bearing sources.
...

With the way you mounted the tailstock. How will you move the carriage? Unless the piece is pretty long. And are only turning so far to the end. You'll run into some trouble.

I'm using Arvids article for determining the forces, motors, and screws. What a life saver that has been!! In that, is where I read that the acceleration forces is the max your motors/screws/mounting...

I pretty much know what capabilities I need. Its getting the components to meet that, that's the problem!!! lol

Aluminum(99.9% of the time)
30mm stock or smaller (Rare occasion of turning eccentric)
Cutting speed of .05m/s
Rapid speed of .1m/s
Reverse speed of .05s
Max RPM 4000 at 2HP(Motor can go higher...

I hate to seem....dumber than I already do. haha. But what is WAG?

What would you consider a good FOS for dynamic load ability on screws?

±0.01mm is the average. And there might be a time for a little higher accuracy once in awhile. But I was mainly talking about checking new programs. Making sure all the offsets are correct. That, or...

I figure. As long as the screws and bearings can handle the loads. There shouldn't be any issues.

120N and double it for headroom for 240N
Ground ball screw efficiency 90%
Pitch of 10mm

M(motor Torque) = F*(pitch/2pi)*(1/screw efficiency)
M = 240*1.59155*1.1111
M = 425Nm

Ballscrew RPM =...

What would you or anyone else consider a good acceleration time? I just picked a number out of the air. lol

Well I like yours. :p It says I need less power.

I use mine from machinery's handbook. So far my luck with them isn't that great.