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

Intresting. Photos are uploaded here.

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

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

Gantry is welded
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Gantry is ready for epoxy levelling
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Following with interest, still have my 25 Hiwins laying around, maybe I get around upgrading the beast someday.

Your workshop is really cool!

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

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.

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.
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On evening started aligning Y axis rails
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HIWIN rails. That is awesome. Good luck. It looks good from what I can see so far.

Following with interest. Smart idea to reinforce.

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.
Attachment 16156

Also arrived today enclosure for computer.
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Looking great!

Base is painted with Teknos epoxy paint. Color RAL 5002
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Very nice!

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

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.
Attachment 16167
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.
Attachment 16168

Wow. That thing is a beast.

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

I had not much time on this week for cnc building. Only cleaned and painted gantry
Attachment 16169
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
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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
Attachment 16171

Dust Collection Critic
 

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.

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.

Some progress again:
Attachment 16173

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.

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.

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

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.
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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.

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

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.

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

Havent done not much meanwhile. Z axis is projected and details milled out. Made it from 15mm thick 6082 alu sheet with 50x20 reinforcements to minimize deflection.
Attachment 16223
And other free time what i have after dayjob, is gone for building complete new dust extraction system with one big central unit instead of small blower on each maschine.
Attachment 16224
More about it and more pictures tomorrow.

As promised some more about new dust extraction system. As i earlier posted here idea is to vent that air what is coming trough dust extractor filter outside. For that i ordered special bags made from pvc tarpaulin material. Those bags are over dust filter bags and have output for air what is vented outside. Outputs are behind bags, trough wall and not visible on picture.
Attachment 16225
Now i have clean workshop air :D.No extra fine particle dust on air.

Blower is Holzmann ABS 5340P. It has 5hp (3,7kw) motor. It has huge suction power, and already on first tests was clear, that this is way too much. I installed for blower fan speed regulating VFD (Invertek Optidrive E3). On blower fan speed 1800 rpm it has enough suction power to serve 1-2 125mm pipes together (main pipe is 250mm).
That blower running on 1800 rpm is unbeliavably quiet. When smaller units are screaming on high rpm, then its working sound is comparable with cordless drill.
Shortage is, that on colder days is workshop colder due air exchange and needs more heating power, especially when dust blower is running long hours. But spring is around corner and that isnt problem anymore ;)

System to keep the lungs free of dust. Very good idea. I wear the little white masks, when I am cutting and sanding. It is amazing how dirty they get. Thank you for the posting of pictures. You guys are inspiring to me.

I suggest to buy instead of those scrappy white masks 3M half facemask. Example: https://www.pksafety.com/halfacres60s.html or https://www.pksafety.com/3m-7500-lea...tor-combo.html and fine dust filters https://www.pksafety.com/3m-p95-filter.html for them.
Dont buy it over internet. Go to store and find put what size / mask fits perfectly with your face. I have both of them what i linked, but 7500 series fits better to my face.
They wont leak between face and mask like those white masks, and end of dusty workday there is huge difference how much dust have you on your lungs. Of course those white ones are better then nothing, but..... they are quite poor.

Some of Z axis details are screwed together, i hope to finish it tomorrow.
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And started to install electronic and wiring
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Completed today Z axis. Flex buy pressure applyed one hand, measured on spindle bracket is about 0,08mm. To comparision, applying same force on #38 z axis i can bend it almost 1mm.
More pictures about it:
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Awesome job
 

Your z looks awesome and sturdy, good for cutting thick materials.
Today I use my new mask like you suggested. I breathe good. :D.

forgot mask pic
 

oops

wonderful job it gives me inspiration for getting on with my build

happy hunting
archie

Love your Z axis. Thanks for the great pictures. Is it your own design?