MK1 Steel router build log 1500x800x200

[Nr1madman]

What did i forget?


Grtz Bert.

You have thought of alot more than me ;)
Good planning!
In my mind you have everything but think about that you want everything to fit comfortably in the chain so make it a little bigger than you calculate that you need :)

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[driftspin]

You have thought of alot more than me ;)
Good planning!
In my mind you have everything but think about that you want everything to fit comfortably in the chain so make it a little bigger than you calculate that you need :)

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Yes bigger, i read that somewhere before.

Thing is ... above say 18x50 mm it gets expensive quickly.

I need about 2 pieces 2 meters total.. not sure about z axis .. maybe just a rubber tube.

Did you guys fill the chain multi layer?
Or should all cables be beside each other.

Maybe air/coolant lines on the outside ?

Grtz Bert.



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[driftspin]

Ok so,


Cable chain,

Will this fit?





Looks like it is gonna work.



Things to put in the drag chain.

Ground wire 4mm2 6mm
Spindle cy 4x1.5 mm 9.6mm

Home/stop combined
y/z home switches cy 4x0.75 7.1mm
X1,X2 home switches cy 4x0.75 7.1mm


y stepper cy 4x075 7.1mm
z stepper cy 4x0.75 7.1mm

Spare 1 cy 4x075 7.1mm
Spare 2 cy 4x075 7.1mm

Supply / return line spindle cooling 2x 8mm

compressed air line 6mm
coolant line 6mm


Grtz. Bert

[Nr1madman]

Ok so,


Cable chain,

Will this fit?





Looks like it is gonna work.



Things to put in the drag chain.

Ground wire 4mm2 6mm
Spindle cy 4x1.5 mm 9.6mm

Home/stop combined
y/z home switches cy 4x0.75 7.1mm
X1,X2 home switches cy 4x0.75 7.1mm


y stepper cy 4x075 7.1mm
z stepper cy 4x0.75 7.1mm

Spare 1 cy 4x075 7.1mm
Spare 2 cy 4x075 7.1mm

Supply / return line spindle cooling 2x 8mm

compressed air line 6mm
coolant line 6mm


Grtz. Bert

Awesome job!
Have you thought about what happens in the cable chain radius?
I think there has to be some "air" for the cables to move..? But I might be wrong :)
I'm thinking the cables in the outer layer needs to get longer than the ones on the inside...?

No limitswitches? From what I understand softlimits are ok for some...


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[Clive S]

Things to put in the drag chain.

Ground wire 4mm2 6mm
Spindle cy 4x1.5 mm 9.6mm

Home/stop combined
y/z home switches cy 4x0.75 7.1mm
X1,X2 home switches cy 4x0.75 7.1mm

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.

[JAZZCNC]

Won't get that lot inside 18 x 50.!!
Doesn't work like your nice neat drawing and you'll never get them to lay like that in reality. You'll need at least 25 x 56 and even then I'm not sure it will all fit easily.

[driftspin]

Won't get that lot inside 18 x 50.!!
Doesn't work like your nice neat drawing and you'll never get them to lay like that in reality. You'll need at least 25 x 56 and even then I'm not sure it will all fit easily.

Hi Jazz,

I did this drawing to hear from people here who have actually done a drag chain since i have not.

So thank you all for getting involved again and saving beginners like me from obvious mistakes.

So.
The drawing is worst case and 2 spare cables. 4mm2 wasnt drawn.

Ok recap.

I hope i can drop 2 coolant 8mm lines and replace it with 12volt line.

Q1
I would like to know about pc pump radiator setup on z assembly for spindle cooling, is it an ok option?

i can drop from 1.5 to 1.0 mm2 for spindle.
i can drop from 6mm air to 4mm

I have 2 cy 4x0.75 spares drawn.


Q2
Does one stack cables in a dragchain or should it be avoided?

Grtz Bert

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[Clive S]

Q1
I would like to know about pc pump radiator setup on z assembly for spindle cooling, is it an ok option?

The black tube into the reg. is feeding the air into the blue water filter with WD in it (just behind the gantry) and also to blow the chips away. You can see the cooling water 1Ltr on the gantry.

The fan is 120mm

[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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[Clive S]

Hi Clive S,

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?)

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

About the vfd.. spindle 1.0 mm2

Grtz Bert.
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I use something like this on the back of the gantry with less that 1 ltr of water. https://www.aliexpress.com/item/80mm...ceBeautifyAB=0

but you can get one with a little bigger and fit a 120mm fan.

Re the VFD 2.2Kw is at the mains side so at the motor side rough figures prb. about 4A per phase ish.

re the 4mm tube I find that more than enough flow. I have it at about 8 bar and regulate it down on the gantry.