Which thickness CY cable do I need for 1.5kW spindle?

**JAZZCNC** · 27-05-2016

Originally Posted by A_Camera

Generally speaking, yes, 0.75mm2 is enough for most cases for the spindle, but why use something as thin as that if 1.5mm2 is safer, stronger, not much heavier, better suited for the purpose and hardly much more expensive. Can you come up with ONE good reason other than most people don't continually use up more than 5A?

I could but won't get into slanging match with someone so narrow minded. I'm also not saying I would have used 0.75mm2 because I wouldn't have. However only because I have 1.0mm2 & 1.5mm2 which use all the time. If I'd only had 0.75mm would have used it.

The point of my first post was more to re-assure the OP "Bee" that his choice, which he'd already purchased before you posted would be fine. This by now he surely knows because some Muppet started up the thread again 3 mth's after he posted.!!

**A_Camera** · 27-05-2016

Originally Posted by JAZZCNC

I could but won't get into slanging match with someone so narrow minded. I'm also not saying I would have used 0.75mm2 because I wouldn't have. However only because I have 1.0mm2 & 1.5mm2 which use all the time. If I'd only had 0.75mm would have used it.

The point of my first post was more to re-assure the OP "Bee" that his choice, which he'd already purchased before you posted would be fine. This by now he surely knows because some Muppet started up the thread again 3 mth's after he posted.!!

OK, so you would not use 0.75mm2, just want to comfort someone who bought the cable... well, the reason for the Muppet to start up the thread LESS than 2 mnts after Bees last post was to try to open the minds of those who are not sure, so they just follow the stream and go after the majority on these forums. I think that can hardly be called narrow minded, more like an effort to help. Considering the costs of the cable, and compared to the price of the CNC the "use what I have available" principle is really very narrow minded and wrong. Apparently you are more keen on name calling than admitting that I was right, there are ONLY advantages of a stronger, better cable, no disadvantages. You don't answer my question because there is just one answer. Anyway, at least in this post, you made it clear that the 0.75mm2 would have not been your choice, so basically, we actually agree.

...and in all honesty, if you really know what I think you know, then I don't think you would have used 0.75mm2 cable if that was all you had at home. I think you would have done the same I would have done, ordered 1.5mm2 and possibly used the thinner one until the better one arrives...

Like I said, what works and what is right are not necessarily the same.

**JAZZCNC** · 27-05-2016

Originally Posted by A_Camera

Apparently you are more keen on name calling than admitting that I was right, there are ONLY advantages of a stronger, better cable, no disadvantages. You don't answer my question because there is just one answer. Anyway, at least in this post, you made it clear that the 0.75mm2 would have not been your choice, so basically, we actually agree.

I wasn't name calling more stating the obvious. IMO it's muppet with over active Ego that posts reply to question which had been answered already and acted upon by the OP months ago.!
I don't doubt your knowledge of electricker and in principle Yes your correct so if your Ego needs a massage I'll glady ablige and say I agree that 0.75mm shouldn't be first choice.
However the fact still remains 0.75mm2 would and will work perfectly fine. All your arguments regards Cable strength, ridgidty etc are mute because it's stupid thing to rely on cable for strength when it should be supported with bracket. The Only thing that matters is if cable can handle the load of the device it's powering while in prolonged use and clearly it can.

Originally Posted by A_Camera

...and in all honesty, if you really know what I think you know, then I don't think you would have used 0.75mm2 cable if that was all you had at home. I think you would have done the same I would have done, ordered 1.5mm2 and possibly used the thinner one until the better one arrives...

Why would you presume to predict what I would do.? . . . I don't know me so you or anyone else stands NO chance predicting my actions.!!
If I'd took the time effort to fit it then I'd consider it safe and it would stay on. The ONLY time I might do this is in emergency situation to get machine up and running.

Originally Posted by A_Camera

Like I said, what works and what is right are not necessarily the same.

This is contradiction.!! . . . . . If it's working Correctly then it's Right.!!

**lucan07** · 27-05-2016

Originally Posted by JAZZCNC

This is contradiction.!! . . . . . If it's working Correctly then it's Right.!!

Glad to hear it JAZZ I was almost ready to swap out the 6560 on the Sieg conversion but now you say its right I will leave it where it is!

**JAZZCNC** · 27-05-2016

Originally Posted by lucan07

Glad to hear it JAZZ I was almost ready to swap out the 6560 on the Sieg conversion but now you say its right I will leave it where it is!

Performance upgrade is different animal.!! . . . Fatter cable won't make spindle go any faster.

**A_Camera** · 27-05-2016

Originally Posted by JAZZCNC

Performance upgrade is different animal.!! . . . Fatter cable won't make spindle go any faster.

...and who said that fatter cable makes your spindle run faster?

**lucan07** · 27-05-2016

Originally Posted by A_Camera

...and who said that fatter cable makes your spindle run faster?

Thats a dig at me and my 6560!

**lucan07** · 27-05-2016

Originally Posted by JAZZCNC

Performance upgrade is different animal.!! . . . Fatter cable won't make spindle go any faster.

Neither will a different board I will still have a 500w DC motor 200-5000rpm, steppers can alread run faster than size of machine can accomodate, and it hasn't cocked up yet, it leaves that to me I can do that all on my own!

**A_Camera** · 27-05-2016

Originally Posted by JAZZCNC

This is contradiction.!! . . . . . If it's working Correctly then it's Right.!!

No it's not. But I am tired of this discussion, so I will just leave it at that.

...and yes, being called narrow minded is indeed name calling and no, I have no ego problems, it seems that my short comment hurt other peoples ego, not mine.

**paulus.v** · 27-05-2016

Originally Posted by A_Camera

It is thinner and lighter but it should be 1.5mm2. 0.75mm is OK for control signals but actually too thin for the power.

You do not say that you prefer or recommend using thicker cables to be on the safe side or you normally have them at hand or you don't mind wasting a valuable metal with finite resource here on earth. But you say that a 1.5KW spindle cable should be 1.5mm2 and the control cables 0.75mm2 (when most control cables are 0.25mm2). This approach is all wrong!