big budget cnc

**pet30** · 13-10-2017

i got a lot of work done this weekend

the machine has finaly got the rails mounted and they run very smooth
the gantry rails mounted
everything is welded and made grinded for paint
next weekend i will paint the machine

then i need to move the machine on its right place level

mount the r&p, the motor's, drivers etc so a lot of work but i am very happy with the result so far

a couple of my friends where shocked to see this

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**Boyan Silyavski** · 17-10-2017

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

**pet30** · 18-10-2017

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** · 18-10-2017

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** · 23-10-2017

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** · 20-07-2020

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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