Cutting Gears on Two MechMates! #38 & #130 - Parnu, Estonia

[hflwaterski]

Hi Ivo - Looks like your photos didn't come through as links. Looking forward to seeing them!

[ifffff]

Intresting. Photos are uploaded here.

[hflwaterski]

There must have been something wrong with my browser. I can see them now. Sorry about that!

[ifffff]

I had some time again to work on new MM. Sorry for messy workshop.

Gantry is welded
2017-08-27 10.46.29.jpg
2017-08-27 10.46.49.jpg
Gantry is ready for epoxy levelling
2017-08-27 14.00.38.jpg

[Fox]

Following with interest, still have my 25 Hiwins laying around, maybe I get around upgrading the beast someday.

[khouji]

Originally Posted by ifffff

I had some time again to work on new MM. Sorry for messy workshop.

Gantry is welded
Attachment 16130
Attachment 16131
Gantry is ready for epoxy levelling
Attachment 16132

Your workshop is really cool!

[Fox]

What kind/brand of epoxy did you use ? I hear common epoxies creep up at the edges, and you need special self levelling versions.

[ifffff]

Yepp, epoxy is creeping up at edges. After drying i am sanding it down.

Actually i dont know what epoxy it is. On bottle is only information on its properties: UV proof, 5 hours liquid time, 10 hours gel time, total curing time 48 hours. Got it from local composite materials supplier.

[ifffff]

I had over long time again made some progress. Y car laser cutted parts arrived and it is welded together. As you can see on pictures it is little bit different as original. Main plate is 4mm steel, other 6mm steel.
2017-11-29 15.13.42.jpg
2017-11-29 15.13.23.jpg
On evening started aligning Y axis rails
2017-11-29 18.21.19.jpg

[IamDave]

HIWIN rails. That is awesome. Good luck. It looks good from what I can see so far.

[Fox]

Following with interest. Smart idea to reinforce.

[ifffff]

Linear rails are shimmed straight and i started disassembling it and preparing for painting.
To technique aligning surfaces with epoxy can i say that surfaces are coming out almost perfect. Surface flatness was on 0,5mm tolerance, and i think that inaccuracy is caused of sanding. With 0,1mm shims made of beer can tin i got everything staight.
2017-11-30 11.46.38.jpg

Also arrived today enclosure for computer.
orca-image-1512138527241.jpg_1512138528159.jpeg

[MetalHead]

Looking great!

[ifffff]

Base is painted with Teknos epoxy paint. Color RAL 5002
2017-12-04 17.05.07.jpg

2017-12-04 17.13.27.jpg

[jhiggins7]

Very nice!

[IamDave]

That is a very nice looking, well built table. Definitely strong enough to, take a forklift strike and survive.

[ifffff]

Now moved machine to its final location. I hope to have enough time on this week to clean and paint gantry and Y axis car.
2017-12-05 19.27.29.jpg
Motors and drivers arrived. Drivers are Leadshine ES-DH2306 and motors ES-MH33480. They are 3 phase hybrid servos.Holding torque 8Nm
For motion control i ordered ethernet smoothstepper and CNC4PC C23 breakoutboard. For some reason CNC4PC people forgot to send me smoothstepper, only C23 board arrived. Promised to send me ESS separately. Again 2-3 weeks to wait.
2017-12-13 17.31.01.jpg

[IamDave]

Wow. That thing is a beast.

[Jason Marsha]

Great work. Can't wait for the videos of it cutting.

[ifffff]

I had not much time on this week for cnc building. Only cleaned and painted gantry
2017-12-16 16.08.03.jpg
I am waiting criticism to another cnc related idea. I am planning to rebuild my dust extraction to one bigger central unit instead of on each machine one small unit.. Lets say for example like Holzcraft ASA 4003
index.jpg
But to improve shop air quality by blowing used air outside and avoid building special cabinet over dust extractor is idea to order special filter bags. They should be double walled, inside filter cloth and outside airtight fabric with output
purukott.JPG

[IamDave]

I for one think, that is a good idea. I use a dust collector can, in between the blower and router. Still when it comes time to empty it, it is problem. I fill it up twice a week most times.

[IamDave]

Apologies, I got interrupted. What I was trying to say is. I switch the one hose from, my 3x5 router to my 2x2 router. It makes a mess. Not much but it is enough to build up.
I always cut 1.25 inch thick extira panels. So I make a lot of heavy dust.

[ifffff]

Some progress again:
2017-12-21 19.07.12.jpg

Yes, changing dust bags/emptying can makes dust, but idea is to keep shop air cleaner by ending dust recirculation. Anyway i try this idea when my new dust collector and pipes arriving.

[pblackburn]

As in terms of exposure, the changing of any collected media poses more concentrated exposure to the harmful particle. However you choose to capture the dust is up to you, disposing is the higher risk when you have dust collection.

[MetalHead]

Ivo great progress on your machine. Thanks for the detail pictures.

[ifffff]

Gearbox ver 2.0
It is basically same as on #38. But i made 2 upgrades to my gearbox design compared to gearboxes on MM#38. First stronger schaft bearings, 6202 instead of 69102. Appears to 61902 are to weak. On #38 i schould replace them on every 3-6 months. I hope 6202-s last longer. Second upgrade is connection to frame trough 2 6000 bearings. On that way is connection freely moving and what is most important, backlash free. Only bolt trough hole can look tight, but it generates sometimes problems.
2017-12-28 18.37.20.jpg

2017-12-28 18.37.30.jpg

[Fox]

Good to see you are exactly addressing the areas I would or have improved on the standard MM design. Still following with interest. Happy New Year in advance.

[Macwood]

Hi Ivo
I am following your build closely as I am interested in using hiwin HGR20 linear guideways also.
Did you use full lenth guideways or join short lenths? would you be happy to share who your supplier is for hiwin products?

Thanks

[ifffff]

All linear guides - except z axis ballscrew - and belt reduction stuff are bought from Mekanex (https://www.mekanex.com/). All guideways are of cource full lenghts. I better pay extra 100€ for long item transport instead of generating problems to myself.

[IamDave]

Ivo. I checked in to see your new stuff. What do you make?