Re: [CAD_CAM_EDM_DRO] replacing anilam crusader II control

On Monday 16 February 2004 12:21 pm, Jim H wrote:

> Hi
>
> Has anyone out there replaced an anilam crusader II control on a
> knee mill? While my control works well the record and input rs232
> ports appear dead. A com port tester from radio shack shows no
> lights when connected to the record port and only one light when
> connected to the input port.

That the little unit with 7 LEDs and a 25-pin connector on each side? I have
one of those, and it's real handy. The trouble is, you don't know which of
those pins are used, and which aren't. RS232 is a pretty flexible spec...

Maybe you could have a look at the board and see? Which light is on?

Odds are that if the port isn't working the way it should, the chips that
connect to it are the problem. These are very often 1488 and 1489 (or the
equivalent 75188 and 75189, same thing). I had some equipment where Ihad to
replace these regularly, so I ended up putting sockets in. <g> The
receiver half of that pair only needs +5v power, but the transmitter end of
it needs bipolar supplies, typically +/- 12v. If these aren't present then
the port won't work either. The '88 is the transmitter and you should see
power on pins 1 (- supply) and 14 (+ supply). The '89 is the receiver and
that should show +5 on pin 14. Pin 7 is ground in both cases.

> I had hoped to do more 3 axis work but the limitation on keyboard
> entry holds me to 2-1/2 axis mostly. A call to anilam gave a price
> of $7500 for a 3000m replacement control. Just a few thousand out of
> the budget.

Yow. For that kind of money I'd be trying to fix the one you've got. How are
your soldering skills? :-)

> Has anyone tried a home brew replacement?

Not me, but hopefully the above will be of some help.