Had a transformer built - Buenos Aires, Argentina
 

Hi, this is intended to be the future build log of my MM, it may take a long time to have pictures posted, but I started modelling in CAD my future machine, so I will need a place to make questions, this will be that place.

My 3D model is being made in Solidworks, which also has a very nice and free viewer that allows anyone wanting to view and comment my progress to be able to see it without installing the full CAD package.

This free viewer can be downloaded HERE

Here is a photo of what I've done so far:

http://peu.net/mechmate/mm01

The biggest board size available here in Argentina is 3050x1850 so I designed around this size.

Main Longitudinal lenght is 3650mm and beams are 200x75mm C channels at 25.5kg/m
Cross bearer lenght is 2270mm with 80x45mm C channels at 8.7kg/m
Table pipes are 50.8mmx3.2mm wall section.
Total weight so far: 520Kg

Now, here I start with questions, please be patient, I suck at reading 2D blueprints and I may be asking stupid questions every now and then :)

I want to be able to split the machine in parts like Gerald did in this photo:
"http://www.mechmate.com/forums/attac...1&d=1216796877

Once you assemble both sides, are the cross bearers bolted or welded?


Pablo

Bolted

In 10.10.240 steel angle, the photo shows an already machined profile or I should start with a dissimilar sides L angle?

http://peu.net/mechmate/mm02

I can find this profile everywhere here.

Thanks!

Nevermind, I found the answer in the forums, a month here and I'm still discovering the place :)

HI Pablo, I can help u with few parts - let me know if you want me to model a few part - give me the part numbers - I use SW2008 though.

RGDS
IRfan

Hi Irfan, very kind of you :)

But, if you help me it defeats the purpose of the effort Im taking to draw it, which is learn how to read the blueprints & assemble the machine.

BTW, section 10, the table, is finished, now the fun part begins, the Y gantry, it should be easy, I have all the parts already modeled, mmm, not really, motors & rack/pinion still need to be drawn, but I will leave the R&P till I know what can I find here.

Today I called a couple of steel supliers (both local) and the price differences between them was around 30% :eek:
The 200x75x3650mm UPN profile best price was USD235 each, I need to shop more, Im sure I can lower this still more.

Attached is the finished table model.

cheers!

Pablo the table looks a little close to the left end of the rails to me. It could just be the angle of the drawing, double check and see? Can't wait to see it finished so far it looks pretty cool.

JR, you are right, its maybe a little to the left, I used this image as a reference:

http://peu.net/mechmate/mm04

and this was my previous comparative view:

http://peu.net/mechmate/mm03

I re-did it and now it looks like this:

http://peu.net/mechmate/mm05

Now the rail stops are outside the workspace, I guess this is the correct arrangement :)


Thanks!

Pablo, have you enabled measurement on the edrawing file? also apply material so that we can estimate the weights of the individual parts.

RGDS
Irfan

Irfan, I just reopened the file and yes you can measure everything, go to the measuring tape on the left toolbar and once there a new measuring tape icon appears on the middle of the left panel.

Current weight is 550Kg

Pablo, no. 4 cross-support channel from the right . . . . how are you fixing that to the big beam?

I tried to point the cross-support channel legs to the center of the table.

I get the impression that you did not see on the drawing that the table is 100mm off the center of the legs and x-rails? (You seem to be guessing a distance above?)

I missed that one, I guess because it was hidden behind the leg, already corrected this

You are correct, I saw just today the mention about the centerlines, also corrected this, attached is the new model.

BTW, is ok to keep attaching files? I can host them in my site if you want. I see a red bar in the attachment screen that moves to a full position, how do I remove old/obsoleted attachments?

Thanks!

Unfortunately you cannot remove attachments.

Not sure if I will be able to draw during the weekend, I advanced a little today, here is a picture and then take a look at the attachment. Curious minds will look for the animation button :)

http://peu.net/mechmate/mm06

I hope fit is the same in the real world, CAD models provided by Gerald are purrrrfect!


Pablo

Do you want me to delete some of your older attachments, or posts?

Feel free to delete old attachments, I wanted to spare you this job, but it seems VBulletin is configured to not allow edits after a day or so. The latest attachment includes work done in previous posts.

Delete posts? did I say something improper? Im sure I asked some dumb questions already, but its part of the learning process :)

cheers!

I have configured this vbulletin so that users cannot delete their attachments. However, I will delete things on request. Sometimes, if only the attachment is deleted, then the post no longer makes sense - that's why I offered to delete posts as well. (It is easier for me to delete a whole post with attachment)

People who have posted a lot of stuff get their limit increased - but there is always a limit. (Sometimes I copy a post to another thread, and that chews into your limit because an attachment is then posted twice.)

Comment on post #15.. I think the Y-car should turn 180 degrees..your long side of the table is on the right hand side of this drawing. If you fit your router/spindle to view it from the right hand side, then the car is wrong on this impression....I think...otherwise very nice to see it like this, wish I had it like this when I did my build.;)

Kobus, that view looks right to me.

You are right again...0.0 will be on the top left hand side on that drawing......that is why I said.... I think....I should not THINK.:D

To make it clear:

In this view . . . .


. . . . . you should see M1 30 332 P. The y-motor goes on the other side.

Nice model. I wish it had been produced when I was building. :)

Pablo

Very nice drawings. You are doing an excellent job.

Thanks for the nice words, been busy these last days, I will start drawing the Z axis in a few days :)

I started drawing the Z axis, I have one question (maybe more to come)

why 10.40.334 is not laser cut?

I mean, I can ask this piece to be cut from heat hardenable steel if needed.
And to make things simpler (at least for me) I own a small CNC mill (*) I can use for drilling holes before hardening them

Or Im missing something here?

Thanks!

(*) I represent Syil CNC machines here in Argentina.

I very much doubt that you can get that part cut economically from a "tool steel" from a standard laser supplier. Get us some prices and then we can talk again. ;)

Question regarding M1.20.210 excentric bush: whats the purpose of using excentric bushings vs. a concentric one? :D

Thanks for un-dumbing me :)

Pablo,

Eccentric bushings allow you to do two things. 1) You can tighten up the tolerances between the V-rollers and the Z axis. 2) You can adjust the Z axis so that it is perpendicular to the table.

The way you do that is by using a wrench on the hex head of the bushings until they are in the right position and then you tighten the allen head bolts that pass through them. Very ingenious engineering on Gerald's part.

mmm I think I understand, thanks for the explanation, will try to reproduce the effect in the model, updates hopefully tomorrow.

I almost finished 10.40.000, the moving Z axis. Please review any obvious errors, I don't understand why it needs to be so tall and why 10.40.360 needs to be bigger than the plate, I must probably done something wrong.
Anyway, check the edrawing and also check the animation inside, it shows how the excentric bushes work for positioning.


Pablo

Pablo, Me diga...

These files you are sending have a SolidWorks extension? If yes, can you send something that can be opened everywhere... I use Inventor, thanks.

Francis

Hola Francis,

You need an eDrawings viewer, it can be downloaded here: http://www.edrawingsviewer.com/index.html and its free.

Cannot resist the temptation and I joined all parts together, also put there, floating in the air, a metabo grinder, the one I plan to use.
Here are some snapshots, but of course the attached 3D model is more fun to view

http://peu.net/mechmate/mm07
http://peu.net/mechmate/mm08

The rotational center of the torque of the long Z axis is not an issue right?
I mean, the spider 200mm vs the extended arm measuring 260mm in the Z direction when the machine is cutting (tip of the cutting tool) seems to be not enough if the wood being cut is strong, say for example a hard wood or 20mm plywood.
I guess this is compensated by going slower. Am I wrong?

....right? Yes
....wrong? No

Can we have the files in SolidWorks?
 

Hi Pablo,

Nice work and thanks for the effort.

I can open the eDrawing files without any problems but can we have the drawings in original SolidWorks parts and/or assembly drawings?

TIA,
WT

Im not sure if I will release the source SW files, the edrawings files I provided have all the measurements enabled.
Unless Gerald asks me to post them, they will be available only to him, the original designer.

Pablo

Pablo, feel free to publish those files here at the MechMate site. People wanting to read the files have to register and agree to respect the user agreement.

OK, I just wanted to be sure you had no problems :) here they go, the zip file is 13mb so I uploaded to my site, but to force non registered users to agree to the terms and conditions I created a zip file with a link to the file and its attached to this post.

Parts were drawn with SW2007 so previous versions cannot open them. And no, Im not willing to become a file converting service for other CAD packages or SW versions :)

Suggestions for improving the drawings are always welcome, and I will do them on a time available basis.

If you have to thank someone, thank Gerald, without his generosity, this would not be possible.


Pablo