[Connor]

The big chip tray got it's final coat of marine top coat this morning, I think I'm getting high even with the door open and fan on.
Burning a scented candle is helping.
Next is some coolant plumbing and pvc pipe for wiring.
Hoss

YouTube Link: http://www.youtube.com/watch?v=TKV27TQ8-Os

Hoss,

So you the dimensions and / or cad for this chip pan? This is about the size I want for mine.

[hoss2006]

Hoss,

So you the dimensions and / or cad for this chip pan? This is about the size I want for mine.

Sure, here you go.
The drain hole can be whatever size and location you want.
Hoss

[Connor]

Hoss,
What's the distance between the rear of the column and outside edge of the chip tray? I plan on extending the travel like you did one day.. but haven't yet that was what 2"?.. but I don't plan on putting the stepper on the back... So, I don't need near as much room on the back. The front measurement is good.

Thanks, Billy

[hoss2006]

I have a 2 inch column spacer which gives a 6 inch space between the column and outside of the tray.
Hoss

[Connor]

Couldn't remember.. did you use 1/2", 5/8" or 3/4" Plywood ? I thought you said somewhere in the video.. but didn't find it..

[hoss2006]

1/2 inch plywood and 1x6 pine for the sides.
Hoss

[BuckingFastards]

Was just doing some browsing on the web and came across thingverse.com. I was looking over some of their projects, and came across a threadless ballscrew design, which claims you will eliminate backlash with this design.

I was thinking this would be awesome if we can implement this into our g0704 or any other machine for that matter. Obviously we will have to change some dimensions for a bigger hardened steel rod etc, but it may be possible. Ofcourse this will all depend on if the whole setup works and, if it is rigid enough being that the part is 3d printed.

I figure since hoss, you know the in and outs of this machine and you have a 3d printer... I would post the link here and you can let us know what you think.

Threadless Ball Screw. No More Backlash by MSollack - Thingiverse

This would probably end up being a hell of alot easier and cheaper than "threaded ballscrews" if it all works according to plan. In theory it should not slip either as the stepper motors are going to have holding torque when machining, but what do I know, I will just let you guys decide. If you guys say its possible I'm ordering a 3d printer tomorrow...

[hoss2006]

They say it can slip on a printer so I'd hazard there's no way will would stand up to moving a mill table or head around or resist cutting forces without slipping.
Might be alright for a printer that has very light forces to deal with and no cutting forces.
If the design has been around for decades where are the mills using it?
That is only using an 8mm rod which would be too small for the mill, scale it up and that would make quite a big bearing assembly to try and fit in place of a ballnut.
Hoss

[BuckingFastards]

I just read that comment at the same time you posted.

I did find this though http://www.cnczone.com/forums/diy_cn...all_screw.html

There was a discussion about this type of setup years ago here on the zone. Basically that thread just links to this website: Linear Drive Systems for Traverse Winding, Spooling & Reciprocating Motion - Amacoil

The company claims that this system has many applications including cnc lathes, but their setup is much more robust then the 3d printed one.

I also like the EMF (Electro motive force) linear rails that I happened to see somewhere, but cannot remember where, but then again, probably not enough space underneath the bed to fit these bulky systems.

[wizard]

A bunch of manually operated optical comparators use this sort of arraignment at work. I wouldn't cal them an improvement over ball screws in any shap or form. Beyond that the are subject to the same wear as any other ball bearing device.

Was just doing some browsing on the web and came across thingverse.com. I was looking over some of their projects, and came across a threadless ballscrew design, which claims you will eliminate backlash with this design.

Look at how the bearings are mounted. If they aren't loose the day they are installed they will be shortly afterward.

I was thinking this would be awesome if we can implement this into our g0704 or any other machine for that matter. Obviously we will have to change some dimensions for a bigger hardened steel rod etc, but it may be possible. Ofcourse this will all depend on if the whole setup works and, if it is rigid enough being that the part is 3d printed.

The arraignment might work in a 3D printer or other device with no tooling loads to speak of. Even there though experience tell me they would loose registration after awhile. Maybe somebody out there has a different experience but if this was viable for machine tools the industry would be rushing to adopt this method over ball screws.

I figure since hoss, you know the in and outs of this machine and you have a 3d printer... I would post the link here and you can let us know what you think.

Threadless Ball Screw. No More Backlash by MSollack - Thingiverse

This would probably end up being a hell of alot easier and cheaper than "threaded ballscrews" if it all works according to plan. In theory it should not slip either as the stepper motors are going to have holding torque when machining, but what do I know, I will just let you guys decide. If you guys say its possible I'm ordering a 3d printer tomorrow...

You don't need a 3D printer to make such devices. You could probably build the units with nothing more that a drill press if you really wanted too. I don't really like to knock ideas as that is how progress is made, but these sorts of feed screws have been around for ages (maybe 30+ years). As I mentioned they are used on at least one brand of optical comparator. However manually and frankly very slowly moving a slide on an optical comparator isn't the same thing as having a servo slam an axis back and forth all day. I'm still of the opinion that if such devices worked in the machine tool world we would see them in wide use.

[hoss2006]

funny, didn't I say the same thing?
Hoss

[jhoffman@tftech]

Hey Hoss,
Here is a picture of the your chip tray on steelroids.Attachment 193884
I have been working on the code for the Automatic Tool Probe almost complete.
John

[hoss2006]

Very nice, the frame looks well made. Wow, that's a big monitor.
Hoss

[jhoffman@tftech]

I basically took the dimensions and made a steel tube frame w/sides and covered it with vinyl, Plexiglas and steel. I think the next one I make it will be like a full size crash cart with for ease of moving with drop sides. Also I will add put drawer underneath the main platform to hold the controls, computer and tools along with a coolant tank under the mill. But this first one really does a nice job keeping the chips in one spot instead of on the floor.

O the display is a 19" LCD panel it is nice to have the display and keyboard over by the front doors on the mill.
John

[hoss2006]

Oh, I have a 19 inch monitor too, looks much bigger in the pic, must be the angle.
I have the panels, acrylic and misumi 15x15 beams siting here waiting for someone to get off their butt and finish.
Hoss

[hoss2006]

I'll soon have access to my basement again and my rf45 and g0602.:wee: on nice weather days at least.
A hoveround just wasn't going to do me any good to go back down around the house to the basement door
so I just ordered this instead.

Attachment 194626
I'll be able to ride it right thru the door.
And bonus I'll be able to cruise the neighborhood at 45mph.
Hoss

[Kevinj308]

Nice!!! Wear a helmet!!!!

[hoss2006]

Nice!!! Wear a helmet!!!!

Thanks, yeah it's the law here.
Hoss

[Bubba]

Hey Hoss,
Do they also require a Motorcycle endorsement on you license???

[hoss2006]

Hey Hoss,
Do they also require a Motorcycle endorsement on you license???

This one is only 49cc so doesn't even need titled or licensed here.
If I get a bigger 150 that can do 60+ later I'll have to go through all that rigmarole.
This is really for just around the neighborhood and the back of the house.
I have no desire to dodge traffic on one of these.
Will be enough to avoid the quads that zoom past the house everyday.
Hoss