big budget cnc

[Boyan Silyavski]

It starts to look very nice. There is something in that metal structures that i like...

[pet30]

thx

its still a lot of work but i hope everything will work out very good.

https://www.cnc4you.co.uk/Stepper-Mo...-4-Axis-Nema23

is this the best set for the machine?

[Neale]

there will be a lot of replies that say "68V PSU and AM882 drivers." I agree - you are building a good machine so don't spoil it by using under-powered motors. Those motors themselves would be fine but they will really deliver better performance at a higher voltage and drivers to match.

[pet30]

SO 68V PSU and AM882 drivers is the better opion then?

the steppermotor's are they ok and i can mount them directly to the rack&pinion ?

or do i need to use a gearbox of some sort?

[pet30]

Well its bean a very long time since i last came here ...

Shortly after I started working out the CNC machine, I bought a land, bought a wife a year later and married a year later
and start building a year later.
Our house is now finished and in the meantime I have been able to finish everything due to the corona crisis and finally had some time to continue working on my cnc.
The frame of the cnc is built in a steel tube of 80x80x4 and is 3200x1760.
I have a milling range of 2760x1240.
it has round supporting guidance and works with R&P system (direct drive). the nema 23 motors are pulled against the rack by a spring.
the software i use is estlcam with an arduino uno.
I personally find estlcam a very user-friendly software.

Now I still had some minor problems including:
the gear does hit the rack but at some point it slips, what could be the reason?

If I put the machine home (at a rather low speed) at the x axis it goes to 0 and goes back a bit
on the other side the other motor (X2) runs very slowly and if the machine is homed then it seems to me that the X2 motor "jumps" back 1 cm. What could be the reason for this?
if I have the machine home so X0 Y0 Z0 estlcam software says that I sometimes have distance and step loss could this also be due to the gear or the smaller limit switches?

regards
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