NCA - Transformer Overtemperature - Arrow 1000

[dreygata]

Hey,

I am getting an error message whenever I try to turn on the machine power of our CNC machine.
I've attached an image of the message below.

Could anyone try and help me figure this one out?
Thanks

[Al_The_Man]

Many transformers have temperature sensors buried in the winding, either the sensor is defective, open or the TXfr is overheating?
If the transformer is powered up when you switch on the machine then it would not be an overheat problem.
Al.

[dreygata]

How would I check these things? I'm new to the CNC machine world.

[Al_The_Man]

First check the transformer for overheat, it is usually a large supply transformer in the enclosure or attached to the machine, you really need the machine schematics to locate any sensor wiring, otherwise it is just a case a tracing it out, look for a pair of small conductor wires leaving any large transformer.
Al.

[maver1ck]

Is this is a machine you just purchased, if so, did it come with the factory transformer? If it did, you need to hook up the overtemp signal wires which were disconnected to ship it to you.

If the seller kept the transformer (which happens on most used Cincinnati's I've come across), you will need to jumper out this signal to get the control to clear the alarm.

If you check your prints they will tell you what pin/plug needs to be closed to bypass this signal.

If you've been running the machine for a while and this just came up, as Al indicated, you have to look at the transformer to ensure it is not faulting for a reason.

The more information you give about the history of the fault when posting, the easier it is to point you in the right direction.

[DukePho]

Hi, I find this forum is very helpful. I have the same error message but it's not on all the time. It seems like if the machine is off for awhile then the error appears but if it's running often, then the error disappear. I don't have the factory transformer. I hook up the machine to a 208V. Can you help me? Thanks

[overflowmachine]

Start looking around inside the power Cab and on the transformer case itself for some type of reset switch or tripped breaker. I do not advise you to even open the Cab unless you have some experience with electrical systems. If you have given it plenty of time to cool down and are still getting this alarm then something like a switch or breaker needs to be re-set or worse. I have two Arrow 750's both have external power transformers. I have never seen this error but will take a look at mine tomorrow and see if I can find some type of re-set.

[DukePho]

thanks u overflo . I check but cant find the problem. Please help me out.

[DukePho]

Hey,

I am getting an error message whenever I try to turn on the machine power of our CNC machine.
I've attached an image of the message below.

Could anyone try and help me figure this one out?
Thanks

Have u fix the problem? i have same thing on my machine. need help, thanks

[Al_The_Man]

Obviously the controller has to obtain the information from some source such as a sensor in order to display this message, you need to examine the electrical prints to ascertain which input has a temperature sensor or similar, of some sort and trace it back to the source.
Al.

[maver1ck]

Dukepho,

Your description that running for a while will make the alarm go away doesn't make sense. If the Overtemp signal from the transformer is missing, the machine shouldn't be able to run at all. Are you sure you have the same alarm as the original post?

However, based on the original post issue, the following are your most likely scenarios:

1) your transformer has a similar overtemp switch, and your transformer is overheating (or the overtemp switch faulty and is tripping when it shouldn't)

2) You are not using the input and there is a jumper closing the circuit. Check your jumper to ensure it has a good connection.

[DukePho]

Im new to this. Do any know who can come fix the problem? i live is Santa Ana, Ca. 714-548-5839. Thanks for all ur help. This is a overtemp switch?