Replies to This Discussion

Permalink Reply by Kevin Bouchard on June 10, 2012 at 8:58pm

I updated the album with my current progress.

http://www.diydrones.com/photo/albums/diydrones-cnc-prototype

Sorry for the delay, I hope you like it.

I'll have to make the whole frame larger to compensate for the size of the cross slide if we want to stick to our 18''x24'' build envelope. I'm still figuring out how to assemble the cross slide, but I think I'm on the right path.

EDIT: I think I can modify the cross slide to make the tool ride closer to the way... That would imply adding another 3/8 plate though...

If you don't have anything to add, I guess I'll work on the z-axis way next? Meanwhile, maybe you could sketch what you think the tool mount should look like?

Permalink Reply by Kevin Bouchard on June 13, 2012 at 8:37am

That's Good, but I'm not sure I understand what you want. Care to explain more?

Permalink Reply by Kevin Bouchard on June 14, 2012 at 7:47pm

Bleh, work and school are taking over, I might not have time to work on this before sunday.

Permalink Reply by Fred on June 15, 2012 at 11:30pm

Monroe,what angle should the Dovetail have ?I was trying 45°,but that looks too much for me.

Any suggestions ?

cheers

Fred

Permalink Reply by Kevin Bouchard on June 18, 2012 at 8:22pm

I'm posting the SolidWorks (2010) files to this thread for anyone to check out, measure or add to them. I need some time to prepare for my exams so I won't be drawing as much for about 2 weeks, but I'll still try to contribute. I have to finish these drawings if I before I start thinking about the servo system... I'm having a few ideas :p

I'm still figuring out how to lay out some fasteners, so some holes are omitted for now. I believe 5 bolts on each dovetail block will be enough to sustain the shear stress on the cross slide, but I haven't done the math yet :(

For those who don't have SolidWorks, you can browse the files with eDrawings.

Let's get this prototype going :)

Attachments:

• DIY_CNC_PROTO_V0.1.zip, 2.4 MB

DistributorPermalink Reply by Dany Thivierge on June 25, 2012 at 10:37am

How much more work is required on the drawing? 

Monroe, can you have a list of more things to add? or some sketch of what is missing? 

I have a friend who works with Solidworks all day but not sure he can help. He will not have much interest in a CNC Machine but if the changes/work left if not too bad I could ask him. 

Dany

Permalink Reply by Kevin Bouchard on June 25, 2012 at 11:11am

Also some details like motor and leadscrew mounts and a few brackets. But that depends on how much you're willing to improvise on the prototype :p

DistributorPermalink Reply by Dany Thivierge on June 25, 2012 at 11:56am

The website destroyed my post again!  :( 

I was saying that I would not like to overload my friend if I ask him, what kind of work (time) is needed? Do we have all the specs for him to work on it? just asking for a few mounts and brackets would he understand what we need?   For sure he works for a living doing this for car manufacturer robots and things like that... but  a nice list of exact requirements would be great to see if I could interest him into doing it for us... 

Dany

DistributorPermalink Reply by Dany Thivierge on June 26, 2012 at 8:08am

Hey guys found this set of plans in solid works already.. maybe there is parts we can reuse? Full credit to the author, jgro and link to his post here: (download link included there as well)
http://www.cnczone.com/forums/diy-cnc_router_table_machines/7237-so...
Attached is a rendering of his work.

So this may speed up our design process if the parts are somewhat standard and fit... no?

Attachments:

• Image18.gif, 96 KB

DistributorPermalink Reply by Dany Thivierge on June 26, 2012 at 8:17am

Oh and I like this!
http://www.kickstarter.com/projects/93832939/makerslide-open-source...

and
http://www.planet-cnc.com/

DistributorPermalink Reply by Dany Thivierge on July 10, 2012 at 10:56am

yeah!  :)   

My friend asked me is we were going for servo with "ball screw"... he seems to think it's the best... what's the answer? hehe

Permalink Reply by Kevin Bouchard on July 9, 2012 at 8:28pm

Okay! So I'm back on the proverbial horse again. Tonight I made the Z-way dovetail:

Monroe, as I understand it, the standoff plate we talked about 2 weeks back should be mounted where I drew the red rectangle? So I should put recessed holes so the bolts don't interfere with the crosslide during movement?

I can make some more progress with the drawings during the week. Is there any other obvious "big" parts lacking? If not I'm just going to refine the bolt placements and add fasteners where there are none (for instance, how should we assemble the frame?). Also, if you have suggestions on how to mount the X-axis (gantry) leadscrew, go right ahead and tell me, because right now it could be problematic because of how we mount the gantry way itself. I think a proper idea would be to redesign the gantry mounting blocks so they can accommodate the screw ends too as well as being the motor mount at the same time.

I hope some of you are still on board for this. We have our work cut out for us. There are tons of refinements to be done on those drawing, so if someone wants to help, don't hesitate!

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