MK1 Steel router build log 1500x800x200

[routercnc]

For the drag chains:
My old machine had drag chains down both sides. On one side I ran the signal cables and on the other side I ran the stepper cables and power lines (pump, light etc.). This was to keep them separate for interference. I've seen others groups them all together so maybe not required but it would give you double the space. Each one was quite large if I remember correctly, maybe 50x20 or so?

For the cooling:
An earlier version of my old machine had the radiator on Z axis and that worked fine but did not look very nice with all the tubing sticking out. I moved it to the end of the gantry which was better.
On my next machine I'm planning to run the cooling pipes all the way through the drag chains and off the machine to a reservoir tank (no radiator) as I found the spindle got barely warm even with the fan off (and sometime the pump off as well for small jobs). I will rely on the thermal inertia of a much bigger tank of water. Easy to add further cooling if it does not work but experience of the old machine suggests it will be OK.

Compressors:
I'm no compressor expert but when I last looked at them you could either have quiet and low flow rate, or noisy and high flow rate. If you wanted higher flow and reasonable noise you needed to get multiple cylinders, belt drive but they were a lot more money.

[driftspin]

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.

Ok so..

So i am reading between the line, you are saying the vfd does 400 volts secundary.. That is even better actually.

Routercnc
You say you moved the radiator to the end of the gantry. Pure cosmetics?
I dont want to design in a direction that is some how flawed... or less desirable for know reasons.

Dual dragchains might do the trick also.
need to look in to that.

Ok so i will first reduce size on the diameters for vfd cable and air/mist lines.
After that i can measure cable length per type. see if i can get to 50% or so fill rate for the dragchain. if no i have to bite the bullit and go bigger.


Grtz. Bert


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[driftspin]

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.

Hi Clive S,

Do you think the leadshine dm856 will do for my setup?

http://www.leadshine.com/productdeta...DM&model=DM856


Or will i gain lots in buying am822 drives.
I am not sure i can still buy them oem ... Though somebody said there is nothing wrong with a good copy.

They look alright @80v /5.6 amps

I have the cnc4you 4amp 4nm nema23 steppers.

Grtz. Bert

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