1992 Haas vf-2 this is insane...

[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 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?

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

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

[mikemike^3]

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

[haastec]

Very true, its working now, ill leave it alone, the next time it happens. ... (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.

[iamhaastech]

I'm betting on power supply just fixed a lathe a couple days ago same prob, a new on from hfo is 350.00$ and it will replace two of the power supply's and will power the mocon boards making the machine a ill more simpler. Sounds like the power supply is taking a sh$& they will be bad at 11.5 volts the mocon boards and video boards are picky. Also check your dc buss should be around 340 vdc and check to make sure the machine is phased right this is vary hard on the machines drives, andddddd also check to make sure the 230 voltage is on the right taps on the main power supply in the bottom right of the power cabinet. Hope this helps

[sagespecialized]

mikemike^3

I sent you a PM.

[amishx64]

Mike, is there any correlation between temperature in the shop and when the machine works / doesn't work. In cold weather, metal shrinks. Think solder joints, etc.

Just an idea.