[mikemike^3]

Hello,

I have a 1992 Haas vf-2 that I am about to melt down for scrap and build a toilet with.

About 3 weeks ago I turned on my machine and all I saw on the screen was snow. In the top left was a blinking square kind of like a DOS prompt.

I left the machine alone for about 3 days and the powered it again and it worked!

But yesterday the same thing happend. I have a snowy screen with a flashing DOS square in the top left.

Ohh and even when I push buttons it does not beep or do anything.....

Any help?

I can see the plunger down the hall.........

:drowning::drowning::drowning::drowning::drowning:

[Geof]

Have you checked the power supply for the main control board?

[mikemike^3]

Hello, I have checked the powersupply, but there are many of them, can you point me in the right direction, I was on the phone with the tech and the power to each supply is there....



Thank you for the reply

[Matt@RFR]

Does a simple power down / power up clear the screen? Mine does that occasionally, and has since day one. Takes a minute to deal with.

[erd39030]

Before you make your toilet
could you read all the EPROMS of the processor board and email them to me,
please?

We have a 1990 VF-1 that could make a nice toilet too... :devious:


This are the symptoms:

It hangs out at random.

I think that the EPROM might be corrupted, because:
1) If I press the Alarm button twice, the screen shows garbage.
2) When the mill freezes the RUN led of the processor board goes out.
3) It has new processor & video boards, but with the original EPROM
4) I still freezes with all memory and parameters erased, and with all servos and encoders disconnected.
5) I read all the EPROMs, burned them in new chips, still the same.

But the fact that it does not freeze always at the same point tells me that it is not a software issue. Can it be?

Any ideas?

Has anybody ever attempted to replace the Haas boards with a PC? (Mach3, EMC2)

Regards:
Everardo Rascon
Auto-Tec

[BigNizzy]

My money would be on the power supply.

It looks like a PC power supply (because it is) but it has slightly modified internals. Haas do a replacement.

[mikemike^3]

If its the power supply, how would I suspect it is? Just hook up an oscope to each voltage output?

[mikemike^3]

Before you make your toilet
could you read all the EPROMS of the processor board and email them to me,
please?

We have a 1990 VF-1 that could make a nice toilet too... :devious:


This are the symptoms:

It hangs out at random.

I think that the EPROM might be corrupted, because:
1) If I press the Alarm button twice, the screen shows garbage.
2) When the mill freezes the RUN led of the processor board goes out.
3) It has new processor & video boards, but with the original EPROM
4) I still freezes with all memory and parameters erased, and with all servos and encoders disconnected.
5) I read all the EPROMs, burned them in new chips, still the same.

But the fact that it does not freeze always at the same point tells me that it is not a software issue. Can it be?

Any ideas?

Has anybody ever attempted to replace the Haas boards with a PC? (Mach3, EMC2)

Regards:
Everardo Rascon
Auto-Tec

If you show me how to download the eeproms I will send it to you, I have rs232 port also...

[BigNizzy]

If its the power supply, how would I suspect it is? Just hook up an oscope to each voltage output?

Good quality meter onto each of the outputs, from memory it was the power supply to the mocon that went on ours.

[mikemike^3]

Does a simple power down / power up clear the screen? Mine does that occasionally, and has since day one. Takes a minute to deal with.

Hello, no powerup/down does not fix the issue.

[mikemike^3]

Good quality meter onto each of the outputs, from memory it was the power supply to the mocon that went on ours.

I will check the power supply with all the outputs disconnected (cabling off) and check for power to each. is it 5v? or 12v? 24v? not sure....

[BigNizzy]

From Memory it's a mixture of 5v and 12v the manual should help.

[mikemike^3]

From Memory it's a mixture of 5v and 12v the manual should help.

Im gonna check it now and get back to you guys give me about an hr. Thnx

[mikemike^3]

well.........now it works! this is crazy.......I hate electrical gremlins :devious: Im gonna check voltages and get back with ya guys

[WallyL7]

Try unplugging it then plug it back in...lol - isn't that the normal helpdesk reply?:banana:

Glad you are up and running again - but sounds like you may still need to check out those power supplies or you may be up the creek again. Still, though...a '92 machine?! That is some ancient stuff man!

[erd39030]

If you show me how to download the eeproms I will send it to you, I have rs232 port also...

Thanks Mike.
But you shoulnd't mess with the EPROMS until you are ready to scrap your machine, not because it is difficult, but because of the risks involved.

To read the EPROM chips you need a programmer like this:
PCB5.0E SMD Willem EPROM programmer,BIOS,PIC,ShipfrmUSA | eBay

Then you have to remove the EPROM chips from the boards and read them with the programmer.

The risks are that if you handle the boards incorrectly, you can damage the ICs due to static electricity, or bend/break some pins. Also, if you put wrong the chips in the programmer, or if you configure it incorrectly, you can short circuit/burn them (flame2)

Anyway, it is fun to tinker with the stuff we are not supposed to tinker with... :bat:

[mikemike^3]

Very true, its working now, ill leave it alone, the next time it happens. ...(chair) (to the machine tho...)

[haastec]

Very true, its working now, ill leave it alone, the next time it happens. ...(chair) (to the machine tho...)

When you were checking the voltages, did you actually unplug the cables and put them back on? If so, sometimes that alone clears up many voltage related problems. The connections get a little oxidised and the friction of disconnecting and reconnecting the plugs can restore the connection to deliver good voltage again.

[Joe S.]

A word of caution:
Switching power supplies (as opposed to linear type ) require a load any time they are powered up and WILL usually go up in smoke if operated without a load. Some of the newer ones have internal load resistors to protect them but not all.

[erd39030]

A word of caution:
Switching power supplies (as opposed to linear type ) require a load any time they are powered up and WILL usually go up in smoke if operated without a load. Some of the newer ones have internal load resistors to protect them but not all.

Wow!

There´s always something new under the sun.