Search found 18 matches

I am selling my Triac if anyone is interested. Purchased from a school having had very little use. Converted to mach3 and has not had a lot of use since. If you're interested, you can contact me on 07710498267. Thanks.

Problem solved, G97!
Thanks for your help angel tech, greatly appreciated.

Thread cutting operates fine if I turn off "Use Spindle Feedback In Sync Mode",
but obviously the pitch will be ropey.
Just waiting to try another desktop to see if that solves the problem.

Hi all,

My Orac on Mach3 has developed a problem when attempting to thread cut.
It has done plenty before, but now the Z axis stutters along, then comes out in X, but doesn't
return to the Z start posn, it tries to take the next pass from the end of the last one.
I've cleaned the optical readers ...

Hi all,
Could anybody point me in the right direction.
I need to be able to engrave on the radius of a Gear Shift Knob.
I have a Triac using Mach3. I turned the knob on my Orac and engraved on
a flat surface ok, but would like to try engraving on a spherical surface.
I have downloaded Cambam but ...

Tel: 07710498267

Triac wanted, contact 07710498267

I have a 1983 orac I am thinking of upgrading to Mach 3. The only fault it has is I am unable to alter the the spindle speed,
which is down to the PC1690 board.
Are there any kits available?
Any advice on converting to Mach 3, would be welcomed.
Or if anybody knows if someone could do this for me. I ...

Hi,
I have a spindle speed probem and have found that the PC 1690 board has a failed chip, Ferranti ZN435J 8216.
Does anybodyknow where I can get one or a spare PC 1690 board?

Regards
John

Hi,
I have a spindle speed probem and have found that the PC 1690 board has a failed chip, Ferranti ZN435J 8216.
Does anybodyknow where I can get one or a spare PC 1690 board?

Regards
John

Hi,
I have a spindle speed probem and have found that the PC 1690 board has a failed chip, Ferranti ZN435J 8216.
Does anybodyknow where I can get one or a spare PC 1690 board?

Regards
John

Hi,
I have tried reset buttons, but to no avail. I have had the PC1690 board checked out and the Ferranti ZN435J 8216 chip is failing, getting hot. I will try and source one of these or hopefully find a spare PC1690 board.

Regards
John

I have measured the voltage at pins 17 and 18 on the PC1690 board and it is 5.2V. When the
-ve button is pressed to reduce the speed the voltage drops to approx 1.2V.
So am I right in thinking the 10V Zener is ok. If so, what do I need to check on the VFD.

Regards

John

Hi,
Does anybody have any electrical drawings for a 1983 orac.
I am trying to get my spindle working properly.
It is running at a constant speed and I am unable to change manually
or in program.
I have tried both reset buttons.
I can run programs, but spindle speed does not change.
The bleeper works ...

Yes, everything seems ok. I have ran a program, but spindle speed cannot be changed.

Hello Rob,

Thank you for responding.
No it doesn't change within the program.
It did work fine until I triggered the limit switch on the x axis.

Regards
John

Hello All, I have a 1983 Orac with a spindle speed problem.
When I start the spindle it reaches a constant speed and I am unable to change the speed
using the -ve and +ve buttons. The bleeper is working but no change in speed.

Hope somebody may be able to help.

Hi all, I have just bought an 1983 Orac in great cond and totally standard.
I have written a few progs on xp laptop using the old dos software with no problems. I could now really do with an ATC or even a quick change tool post with holders, as this has the single clamp.
Cheers
John