MK1 Steel router build log 1500x800x200

[driftspin]

Bert.
Why do you need a ground wire in the drag chain, also if you want to use cy cable for the switches why not use 3 core 0.5mm. I just have 4 mm air lines in mine and find it ok. You could also use 1.0 mm to the spindle as it is 3 phase and the 2.2kw will be split between the cables.

Just a thought.

Hi Clive S,



4mm2 earth (functional, not for protection)

Since all metal runs on bearings on these machines.... you want to make sure no (fault) current will ever pass through them to ground.

All moving parts are so inter connected without the stepper or signal cables.

4wire cy home
I have combined y and z home in 1 cable.
+,-,y,z


Also x1 home and x2 home are combined.
+,-,x1,x2


Yes i can probably do cy 4x0.5mm2 for sensors.


I am looking for a single cable type for ease of ordering, single item to stock and just having a single package of +/- 50m item making it less expensive.



I have no clue on how much air i need glad to hear 4 will do.
Need to find out before buying a suitable compressor (will a double or quad airbrush silent type work?)


like one of these:

6bar 25 liter 60 db

https://www.hbm-machines.com/product...ush-compressor


About spindle cooling.
Do any of you run a pc cpu cooling type radiator/pump on the z assembly?

Dont see the real advantage of running the cooling lines towards the controls cabinet.
And do the same thing there.

Running 12 volts for pump and fan to the z assembly beats 2x 8mm cooling lines in my opinion.


About the vfd.. spindle 1.0 mm2

Is it 230volt 3phase out right?

This formula should then resolve amps

P=V3*U line*I line*cos phi

so

2200=1.73*230V*6.9A*0.8

So 6.9amps?
1mm2 should cover that than.


Any thoughts?



Grtz Bert.





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