MK1 Steel router build log 1500x800x200

[JAZZCNC]

But that wouldn't help if you crash into a clamp or something during acceleration at say 50rpm, then I would still get the possibility of losing "square"

Well that depends really. The drives have fault feature when tripped for any of the protections, ie: current voltage etc and usually if you hit a clamp or anything strong enought to stall the motor it will fault one of the drives protections anyway. In which case provided you included the fault signal in your E-stop circuit your still safe.

However I can tell you that if you stall the motors other than hitting something then it nearly always happens at higher than 300 rpm, usually when doing rapid moves.

[driftspin]

Well that depends really. The drives have fault feature when tripped for any of the protections, ie: current voltage etc and usually if you hit a clamp or anything strong enought to stall the motor it will fault one of the drives protections anyway. In which case provided you included the fault signal in your E-stop circuit your still safe.

However I can tell you that if you stall the motors other than hitting something then it nearly always happens at higher than 300 rpm, usually when doing rapid moves.

It is all in the future for me...

I am still stuck in hardware mode...


But made some progress today..

Grtz. Bert

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[driftspin]

Well that depends really. The drives have fault feature when tripped for any of the protections, ie: current voltage etc and usually if you hit a clamp or anything strong enought to stall the motor it will fault one of the drives protections anyway. In which case provided you included the fault signal in your E-stop circuit your still safe.

However I can tell you that if you stall the motors other than hitting something then it nearly always happens at higher than 300 rpm, usually when doing rapid moves.

Hi all

I want to order some drag chain.
What did i forget..?

Things to put in the drag chain.

Ground wire 4mm2 6mm
Spindle cy 4x1.5 mm 9.6mm
y home switches cy 4x0.75 7.1mm
z home switches cy 4x0.75 7.1mm
y stepper cy 4x075 7.1mm
z stepper cy 4x0.75 7.1mm



Spindle coolingpump/fan cy 4x0.75 7.1mm
or
Supply / return line spindle cooling 2x 8mm

compressed air line 8mm
coolant line 8mm

Control valve air/mist/ coolant cy 4x0.75 7.1 mm, do you guys put that in the controls cabinet?



Miscelanious.. dustshoe retract.. power for camera, spindle illumination cy 4x0.75 7.1mm

Maybe combine all controls like valves, spindle light, mist/air, coolingpump / fan etc in 1 cable.



What did i forget?


Grtz Bert.








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[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]

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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