sajo 54, what shall i look fore cnc parts?

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05 Dec 2019 19:28 #152089 by 54hakan
Hi

i bougth a old sajo 54 slowsyn knee milling machine

it is whit a not working haidemheim tnc 145 , whit analog dc motor and drives
glass scales, and ballscrews, hydralich tool fastner

it was a slowsyn from the beginning,, but convertet to tnc 145 many years ago

the dc motors are 3.4 nm and have 16mm shaft, an 1:2 belt drive


i am not shure what way i should go,
i probebly can get the tnc running
or i can probely get a newer 3xx 4xx haidemheim controller and get it to work

but, i have som thinking about to have a cnc lathe to, and mayby another milling machine whit higher spindle speed
and having one kind of controller fore them all would be nice, and linuxcnc is one way to go then
and, a 4th axis is possible fore mee, do have one old to use


so, what would you do?


did find som closed lop steppers that is intresting, nema 34, they got 14mm shaft and 12nm
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06 Dec 2019 01:18 #152123 by tommylight
Check the mechanical parts for wear
Check the drives if they are in good working condition
Check what kind of signal those drives need for control, most probably +-10V
If all the above is OK, get a Mesa 5i25 or 6i25 or 7i92 and a 7i77 and a used PC, enterprise series Dell or HP or Fujitsu will do just fine.
If you go with the closed loop steppers you would need a 7i76 instead of 7i77 or get the 7i76E only. But you loose the glass scales and i would really try to keep them.
All of the above can do up to 5 axis plus a spindle.

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07 Dec 2019 07:31 #152223 by 54hakan
:)

i did use this machine at work, when it dident work anymore,
and after that the company wantet to scrap it...
so its mechanical ok, i will get it in place, and run the axis with batterybox to be sure everything else is ok

thank you fore the mesa numbers, i did take a look at them but they have a lot of possible options

linuxcnc is given, is there any free cad cam solution that is funktiona whit linux cnc

this is allways the hard thing to get it workeing from cad to running the machine as it should do:blush:

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07 Dec 2019 10:50 #152229 by Leon82
Any cam system will work. You just need to change the post output of it's not compatible.

But code from a fanuc or yasnak will be very close

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07 Dec 2019 11:33 #152230 by tommylight

54hakan wrote: linuxcnc is given, is there any free cad cam solution that is funktiona whit linux cnc

BlenderCAM, freecad has a cam output, Inkscape can be used for 2 or 2.5D, Thay all have free versions for Linux and wondows, i think, and Fusion360 is for windows with a free licence somehow, for students or personal use.

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08 Dec 2019 05:58 #152316 by 54hakan
:)

perfekt

did search for handwheel, mpg
and i did find a lot of small questions of it

but if i ask in general, what is useful there?
i am used to have it, somtime 2 for 2 axis so i dont have to switch to much

possible?


i do ask a lot, but it would be nice to order it so i can have tha hardweaar befor the holyday so i can play whit it to start
i will probely take 2 sets analog for the 54 machine
and a small closed loop stepper fore a lathe , then i can have the small to work whit to test some parts stand alone

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