2 Axis head for $72.00+postage and time

[yohudi]

Any serious builder can't afford to pass this one up.

I have no links to this guy except I was lucky enough to find these for sale at silly price..

the rotary table/drive units come in at $36.00 each plus postage to wherever you are.. this includes the servo motor in the pics.. made by globe motors.. model no 409A582.. to the UK, where I am postage was $40.00 or £17.00

I had to post the pics to my member gallery as I can't get attach to work.

the link to the first pic is below.. you can take it from there.. I have the link to the drive/table supplier and price is still the same.. I've checked.

I can't post link to full construction photos for the head as it's on another forum.. stand back and admire.. just like I did..

http://www.cnczone.com/gallery/showp...0/ppuser/24752

[ger21]

Originally Posted by yohudi I can't post link to full construction photos for the head as it's on another forum.. stand back and admire.. just like I did..

You can post the link, just don't insert images from another site.

[yohudi]

ger21
-----

Cool ... thanks

This 2 Axis head is rainnea's work as you rightly pointed out in my DIY thread. The link to his R +D photos of this unit is on the CNC_Toolkit forum. I didn't see it at his site. I've pasted the link to the R+D gallery below, if not a yahoo member you'll need to register with yahoo to see it.. a pain I know but it's nothing to do with me......

http://ph.groups.yahoo.com/group/CNC...os/browse/8f5c

The supplier of the base drive/table units is another chap entirely. He was easy to deal with and the goods are exactly what he said they would be with links to motor spec and application data.

What impressed me about it most of all was it's such an elegant solution with fairly minor modifications to the basic unit to create the head. If you already use servos you don't even have to find a motor.

sure someone will find it useful..

[High Seas]

This post may fit better here and get me a bit of help. Yuhodi help?

I'm at an standstill on my 4th axis. I'm using the Globe motor rotary - and have worked some of the bits and pieces (Kindly check the pics).

But I'll be darned (would stronger wording if able--after all I am a sailor) if I can find a good gear to replace the existing one.

Note the shafting on the Globe motor is matched to the gear - but there's quite a bit of slop on my PACSCI. I've considered using J B Weld - but seems too permanent -- any ideas?
Any sources for a gear to match better? Anybody cross this problem before?

You can see the problem - my plan is to mount a 4 jawchuck to the face of the rotary and add the unit when needed.
Thanks - and as always Jim

[yohudi]

Originally Posted by High Seas I'm at an standstill on my 4th axis...... You can see the problem - my plan is to mount a 4 jawchuck to the face of the rotary and add the unit when needed. Thanks - and as always Jim

Hi Jim....

Nice job on the removable 4th axis there !!

I haven't started adding any of the rotaries to my machine at the moment. But I plan similar 4 jaw chuck.

I plan on permanently mounting the entire globe assembly to 1 side of my gantry and using a live centre I could fasten/remove to/from the table as required. Sort of thing you have.. but the other way around. Meant just swapping out the motor. As you say the pinion gear is matched to the shaft on the existing motor. I intended having a stepper machined to match the gear for my setup. The length of the shaft on my stepper means I need to shorten it anyway. Thought It shouldn't cost that much to have this done by a guy who made some parts for me in the past.

If you ask the guy who did the 2 axis head how he sorted this I'll bet he has a solution. He is just using nema 23 steppers to run the head.. If you join the CNC_toolkit group at Yahoo you'll be able to ask him directly. The guy you want is called Rab and it's his group. There are questions about the head and related info all the time and he's pretty free with info etc... Even if you just ask a general question you should get a response as there are a lot of group members using the globe assembly.

hope this helps you out

Danny

[High Seas]

Danny - thanks for that!
1. I was Really surprised at how heavy the 4 jaw chuck is --- I plan on drilling and hanging on the face --- ought to be obvious.
2. Got a good idea from Graham (on another post) turn and flatten an interface piece and glue that to the stepper shaft.
3. Or, as I then am considering - cut off the shaft from the globe and drill it out.

RAB sometimes is on this forum as well - - we'll see if he pops in.

3. What are your plans for a live shaft? I was thinking a similar mount to the one I've built. Looking to align with the rotary (obvious) - but am still searching for bits and haven't found the ones I need (yet).

4. I was planning on mounting in vertical position along centerline of the working area [SYSTEM2 -- photo gallery] (aligned with x Axis). I'd get some useful work - I'd have some 10in/250mm, or mount it Horizontally - loose some height due to stepper - but get another cut.

So thats where it is...for now
Jim

[yohudi]

Originally Posted by High Seas Danny - thanks for that!... RAB sometimes is on this forum as well - - we'll see if he pops in. What are your plans for a live shaft? ....... Jim

Hi Jim,

seems you've got the pinion mounting under control.... might be possible to combine both the interface piece AND the drilled shaft approach. Wouldn't think it would move much then. Would still be interested to see how RAB's doing it tho... I've recently posted bug report about CNC Toolkit.. so when he posts the updated version I might take the opportunity to raise the question. Would be sensible I think.

Note your mention of the weight of the 4 Jaw chuck.. will keep that in mind when I'm looking for mine. As regards my plans re: live center.... I thought I'd go with the fixed position drive and movable center because......

1. I could permanently and accurately locate the drive unit and mount it just the once.

2. Ditto the wiring and home/0 degree switch.

3. I could pick up a complete tailstock fairly cheaply via flea-bay and probably use it as is. My plan (like yours I think) is to be able to adjust the distance between drive and tailstock for maximum stock support, as you would on any lathe.

I also thought about setting up along the X axis = max length of 1.8 metres. In the end I thought it unlikely that I'd ever run anything this big/heavy. Decided to mount across the front of the gantry (Y axis) in the end. I can use the gantry uprights for fastening the globe drive unit and chuck assembly.

I've then got 2 options to mount a live centre ... In a tailstock mounted on to the XY table top at any required distance up to 1.4 metres. Alternatively I could use a custom plate/bracket and the 8020 slots on the bottom of the lower gantry span. I've got up to 300mm travel available in Z so if I centred at 150mm I'd get maximum workpiece of say 290mm diameter and about 1.3 metres length.

In some ways the plate off the lower gantry might be the best option. Would mean the drive and center mount on a single plane in relation to each other. Would have to be a hefty plate/bracket though and would probably knock 100mm off the available cut length. I've got a few commercially machined gearboxes and plates etc I could canabalise to make something appropriate and suitably solid.

As soon as I get 5 minutes I'll post a render of what I mean in my build log... will keep an eye out to see how you get on here also..

all the best

Danny

[High Seas]

Hey Danny - Thats exactly the idea I'm thinking -- Use the rotary as a lathe axis and mill with the 3 axis router over it.
I'm also completing a hotwire foam cutter (gotta get it finished up and start a thread). I thought it would be cool to use the rotary in conjunction with that too - cut some foam rope if I can sort out the CAD for it.

Here a link to a thread thats got most of the "Rotary Puzzle/Solution" I've come up with:
attaching work to rotary on DIY table

May find it helpful. At least I've put more pickies there to gawk at!
Jim

[yohudi]

Hi Jim

just thought you might want to know about the CNC_Toolkit user guide I made... Part 1 and 2 of a brand new detailed user guide for CNC_Toolkit are out TODAY.. available as a free download from the yahoo group in my sig..

Rab Gordon, the creator of CNC_Toolkit has contributed suggestions and has approved the distribution. Part 3 covering the deployment and use of multi-axis rotary configurations is currently being developed and tested...

I know you have interest in CNC_Toolkit might be worth a read. Feel free to pick up copy...

ttfn

Danny (aka Yohudi)

[High Seas]

Thanks mate - I'll have to go and pick a sample!
Jim