Retrofitting a 1986 Maho MH400E

Hello,

optical the gearbox looks 100% identical, I think there will be now differences.

I'm back from tour now, and will get on the Mahos Pc soon.

Thanks a lot for the confirmation.

It is a bit weird that the cam switching blocks have 5 cams and 5 switches, but my schematic (and all other MAHO schematics I have studied) only show 4 switches being used for the feedback.
(Edit] Woops In a different part of the schematic it shows all five with the extra one being "Mitte - Vorabschaltung" Middle permature stop?

Mark

I got some feedback from the CNCecke.de forum that the fluid level in the cerntral lubrication system (currently 1/4 over min) may be low enough to trigger the low level switch. If this is triggered, the system won't latch on. I ordered a canister of way oil to fill that up and see it's effect.

I also ordered an oscilloscope, as I want to scope the graphics cards output to see if the HSync signal is there, as at this stage I have no idea if the controller has booted or not.
Mark

RotarySMP wrote: I got some feedback from the CNCecke.de forum that the fluid level in the cerntral lubrication system (currently 1/4 over min) may be low enough to trigger the low level switch. If this is triggered, the system won't latch on. I ordered a canister of way oil to fill that up and see it's effect.

I also ordered an oscilloscope, as I want to scope the graphics cards output to see if the HSync signal is there, as at this stage I have no idea if the controller has booted or not.
Mark

Careful in there, there are some treacherous voltages in there.

Check for caps bulging in the vertical/horizontal circuits. Also check for dc voltage being too low can cause this also.I use to work repairing old video arcade games and the crt's always go bad. Most of the time it was caps.

Just my 2 cents....

Thanks for the safety tip. I took a look at the caps on Sunday (with the power disconnected) , and couldn't identify any bulged or obviously damaged. I figure if I have an H Sync signal (must be somewhere around 14kHz right?) then the controller must be booted, and it is probably a monitor fail. I can then buy a CGA - VGA convertor and use the LCD monitor I already have on the CNC Lathe to get started.
Mark

RotarySMP wrote: TIt is a bit weird that the cam switching blocks have 5 cams and 5 switches, but my schematic (and all other MAHO schematics I have studied) only show 4 switches being used for the feedback.
(Edit] Woops In a different part of the schematic it shows all five with the extra one being "Mitte - Vorabschaltung" Middle permature stop?

Probably 4 data channels and a "data valid" channel.