NUM 720B Repair

[Steven123]

We have a OMAG 95 CNC with NUM 720B control.
We lost the picture on our display so had the monitor repaired, and now we do have the green background on the display.
It's still not working, (there is no text displayed) so looks like there is a problem with the video signal from the NUM control.
There is no separate video card it's all one board. It's use a monochrome display so we can't test it. (there is a 9 pin connector for the video signal)
When we try to test the machine "blind" (from memory) the machine do respond.
Is there anyone who can repair these type of NUM control boards ?

Steven

[9thraven]

Hi Steven

I have a SCM Record 1 with Num720B of which the power supply card for the monitor and controller blew. I have contacted NUM, but they wont supply me with any information regarding the card, so i am looking into supplying the controller with a new power supply and hooking the 9pin (with some conversion) up to a normal 15pin monitor. Will let you know if any progress is made. Have unfortunately no idea concerning your problem if your controller is problematic. There is second hand parts available at CNC-Shopping UK website.

If by any chance you have documentation on NUM720 controller power requirements it would be greatly appreciated. I know the voltage requirements are 15V+ and 15v-, but looking for how much amps it draws. Thanks

[dpl]

Hi

I have all manuals for Record 1 / Num 720 if of help

Regards

Steve

[MLEDWARDS]

Originally Posted by dpl Hi I have all manuals for Record 1 / Num 720 if of help Regards Steve

Hi
Just took delivery of a Record 1 without any manuals! Be greatful for any help!

Thanks

[dpl]

Hi, we have operational Record 1, what info do you need, where abouts are you ??

Steve

[MLEDWARDS]

Hi

Would you have a manual for the Record 1 and the NUM 720? Also you using alphacam? I'm in Ilminster Somerset.
Thanks

[dpl]

We have NUM 720 operator and program manual, Record 1 manual, drilling head manual, manual with all error codes etc plus electrical diagrams - in fact everything that came with machine - they are invaluable

You are welcome to any info, only problem is copying manuals as they are very big

Steve

[MLEDWARDS]

Yeah that is bit tricky.

How are you uploading your programs to the NUM 720?

[dpl]

I got them all copied for someone last year by a local copy shop, I think it cost around £200 but definitely worth the investment as I doubt that a week goes by that we do not use them.

Uploading via DNC

[dpl]

John

Not a problem, it took us a while to sort the comms as the wiring on the RS232 was different,

Mal

We got our plugs from Maplin and the cable from RS

All

Seems Record / Num manuals are in demand, I have now had 4 requests for these, Makes sense to get them digitally copied and split the cost, please let me know who is serious re these as I am happy to get it done but do not want to waste my time

[MLEDWARDS]

Hi dpl

You mention here that you had problems with the RS232 cable as the wiring was different. Did you make up a cable yourself or have it made? I'm also having problems and was advised by NUM that it could be the cable (they have sent me a wiring diagram). I can download from the NUM 720 but not upload to it. Did you experience a similar problem?

Any help/advice appreciated

Thanks

Martyn

[dpl]

Martyn

We made up cables, I have the diagrams, if you send me your email, I will send you them.

Have you got the control characters at the start and end of the comms file ? as this is the most likely reason for failure to upload

Steve