Re: [CAD_CAM_EDM_DRO] Re: Harrison Lathe and Gecko's

Hi Guys,

Just a little up date for anyone that is interested and show that it is wise
to ponder before shelling out loads of cash.

My Harrison has a blown Z drive and I was quoted £388 ($631), by Parker
Digiplan, to replace it with the latest version. They wouldn't tell me
anything about my drive except it was 9 amp and could work at 120 volts DC.
They wouldn't even tell my what the components were. They certainly wouldn't
give/sell my a diagram, but they would repair it for me at a standard repair
charge of £240 ($390). I'm still shocked at the price when I can buy a make
do drive at £99 ($160).

The fault was that the 24 volt power rail blows the fuse. This rail feeds
only the logic. I pondered for 48 hours and tonight started waving my
multimeter around the circuit. There was a dead-short between 0 volt and the
24 volts. After testing all the diodes I noticed a Tantium Capacitor had the
side missing, the multimeter confirmed it was dead-short. This cap is across
volts in and ground of a 7812 regular. It has been pulled as well.

Tomorrow I'll replace both components for less than £0.60 ($1) saving me
£387.40 or a lot of work getting in a lower voltage drive. I am so annoyed
at Parker Digiplan I have a good mind to draw up the circuit from the board
and publish it on the net, but by tomorrow I'll have cooled off.

Regards,

Terry