Mori Seiki MV-Junior Retrofit

A little progress.
After installing the transformer, I'm wondering again whether its power rating is sufficient for three 1.5 kW servo motors.
The transformer is rated at 4.7 kVA, 415 V to 220 V, 3-phase.

What do you guys think? Is 4.7 kVA enough for three 1.5 kW servo motors?

 

besriworld wrote:

What do you guys think? Is 4.7 kVA enough for three 1.5 kW servo motors?

No, depending on efficiency, 4.7KVA is roughly 4-4.5KW, and your motors/drives will use more than 1.5KW at full power.
Still, it will work fine, do not worry about it.
1. chances are you will never have all 3 motors art full tilt at the same time,
2. even then the transformer should survive just fine, although the output voltage might drop a bit, but the drives should handle that,
3. transformers handle overloads quite good, might heat up a bit more, but they do not cut power when overloaded as switching power supplies do.

I think you will be fine, CNC machines rarely use full power and its highly unlikely you'll have all 3 motors at full power at the one time.  For example, the Z axis is only likely to use full power on plunging and then your X & Y are not moving.

Thanks, I think so too, but I had started to doubt it.

Before you start laying out the electrical cabinet for a CNC machine, it looks like there’s more than enough space and everything will fit without a problem.But once you actually start putting everything in place, the picture changes pretty quickly, and you start wondering if you’ll have enough room after all. ?Here’s the progress on the CNC electrical cabinet so far.

 

Would it be better to remove the copper hoses and replace them with clear polyurethane hoses (PA11)?Our main reason for considering this change is to have better visual control of the lubrication flow. With transparent hoses, we would be able to visually check whether the lubricant is flowing properly.Additionally, do you have any recommendations regarding the proper lubrication setup? How should the lubrication system be designed or configured to ensure that it is working correctly and reliably? Any recommendations regarding the type of hoses, routing, connections, or other components would also be appreciated.

I decided to replace the guides with new ones and everything had to be disassembled again.

 

I assume that I also need to replace the lubrication distributor for the bearings. You can take a look at how the original distributors are designed. In the original setup, the oil passes through the thread of the M3 screw.  I have now put everything back together and installed the new linear guides. In the Y-axis, I’m using Schneeberger roller guides with extended carriages, while in the X-axis I’m using NSK ball guides.