[Harpye]

Spindle is an ELTE 1HP = 750W AC high speed spindle ( up to 24000rpm but i Usually go by standardizised 12k to 14k) with a matching inverter

Motors are the 2Nm Standard size 23H276-30-8 1.8nNm on 16x5mm ball Threads

COntroller is a Benezan Triple Beast and a Eding USBCNC Interface

working space is about 200x200x80 over all

the machine is capable of wood plastics and Aluminium

[ame="http://www.youtube.com/watch?v=r-ofwDvQ7Ws"]My Mobile CNC - YouTube[/ame]

[ame=http://www.youtube.com/watch?v=2XhJeNMgVnA]CNC - Cutting A Wrist Watches Housing - YouTube[/ame]

Here is somthing smaller I did in Polyacetal

- did several other benchmarking parts mostly turbine wheels for model / EDF fans, but after a longer discussion my boss forbid me to show them - although they are done privately!!

[DSpeck]

Your results speak for themselves - very well done!

I keep looking at the design, and I can't figure out what the raised section on the sides in front of the gantry is for. I am referring to the upright triangular section (looks like a bridge pillar). It is not attached to anything, so I wondered why it was there. Are there other parts not yet made that will attach there?

[Harpye]

Those are used as a transportation stand for the unassembled axis ... as you can see in post 37 ... in assembled situ you can use it as a mount for a glass top!

[DSpeck]

Sorry, I had missed a few posts. It looks great, either assembled or disassembled. Did you make you target weight of 20kg?

[Harpye]

in the first attemps of construction I was that ambitious ... but as the content of the controlbox - striped down on the minimum weight was 6 KG ( without cables - (copper is that heavy) and the lintec and motors were somehow 12KG I dropped this for a compromise in direction of optimum functionality - decreasing performance to lower weight I could save 600 Gram on the Motors (2Nm to 1Nm) and 800Gram on the spindle (750W to 350W) 250 Gram on the treads - (moving from 16x5 to 12x3 Ballthreads) controlboeard could save 100Gram from 3 channel superb microstep control to 3 channel halfstep breakoutboard over all about 3 KG to be saved against less than half the performance .... no good deal!!! but traveling with two other person I could also share the load to different cases nd so come down below
15 Kg per person what theoretically would allow me to take the Machine into the cabin - If airport security would let me ... but the certificate of safety would cost about several 1000 bucks and would NOT be accepted by several Airlines - esp. on the trans Atlantic flights ... so I also dropped that idea!!

Machine is calculated to bear 3 G + in disassembled state and so I could also give it up as luggage - to be handled with care .... Just would have to transport the PC separately

[dmorton]

I would assume that this method would be limited mostly when it comes to modal aspects as you would mostly define your resonances by the locations of the connection points. Better 20% too heavy than always passing the resonance frequencies of the structure...

In the various papers on their method, they discuss setting resonance goals in addition to stiffness goals for their genetic algorithm.

[Harpye]

Cool - That PHD stuff ... I'm unfortunately not on that level ... I mostly do my designs on "smaller basements"

[dmorton]

http://www.fisita.com/students/congr...f2008sc048.pdf

Looks like some relatively easy-to-use software called Optistruct might be helpful

http://sawapan.eu/sections/section79.../download.html

This software also looks helpful

[Harpye]

Time to show up some productive work:

Proposal and result done with the mobile mill

[louieatienza]

Time to show up some productive work:

Proposal and result done with the mobile mill

Impressive!

[RomanLini]

I agree it's impressive! Harpye- how did you manage alignment when you flipped the part over to machine the reverse side?

Anyway it's a good surface finish, it should be as pretty as the CAD rendering when it polished. Nice work!

[Harpye]

It is!! Shiny and reflective!

About the "flip " there are 2 Slots of 6,01 mm in my baseplate and a centerhole of same diameter ... looking at the Stock Material you may see the center hole plus 2 holes at 5 and 11 the centerhole was the x Fix point the others are used to align along the object along the x Axis!!!

[Harpye]

SOme more cuttin work

[DonFrambach]

Wow! Those are very nice!

[Harpye]

Thank you ! Making this watch is a very new and very interesting attempt low cost, much invest of work and rather fast with the results! only thing is that 0.0x mm ~ 0,00x" tol is rather usual!

[RomanLini]

Yep that's some very nice work, it must take quite a few machining hours too!

[Harpye]

The EDF wheel was about 3,5h

the dial about 1h

Pointers about 20 Min pp

The clock itself is made from
1.4112 which is rather the
same as AISI 404B

It is used in abrassive environment
( molds for fiber reinforced material)

It took much more time for my mill is not designed to cut that stuff...

[Harpye]

Was not that satisfied with the dial so I took another attempt!

the origianl dial is looking better than shown in the pics ... bad illumination and dark ambient light so the silver does not look as it should!