Search found 8 matches

by PDobson
Sat 06 May , 2017 15:25 pm
Forum: Downloads
Topic: Orac paramterics FHP parajust im6007 manual
Replies: 3
Views: 13867

Re: Orac paramterics FHP parajust im6007 manual

Hi, I am very grateful for the FHP manual download as my ORAC speed controller just recently keeled over. However, I am finding it quite hard to read the schematic diagrams, the resolution is just not quite there to see clearly what the connectivity is. is there any chance that the 4 pages of schema...
by PDobson
Mon 10 Oct , 2016 11:13 am
Forum: Orac
Topic: ORAC Z axis not driving.
Replies: 9
Views: 12556

Re: ORAC Z axis not driving.

Thanks for getting back to me. I fear that the transposition has caused the X-Axis card to become damaged. when I put the X-Axis card back in the X-Axis slot, I no longer get any X drive and at least one of the red LEDs is now on (was not before). When I get time I reverse engineer the card and try ...
by PDobson
Thu 06 Oct , 2016 14:09 pm
Forum: Orac
Topic: ORAC Z axis not driving.
Replies: 9
Views: 12556

Re: ORAC Z axis not driving.

OK, so I found a self tap screw that look as though it had nothing to do with the base detachment, now removed and guess what, the base swings down nicely revealing all that 1960s electronics. I swapped the drive card for the Z axis with the X axis and now the X axis has stopped working so must be s...
by PDobson
Wed 05 Oct , 2016 22:06 pm
Forum: Orac
Topic: ORAC Z axis not driving.
Replies: 9
Views: 12556

Re: ORAC Z axis not driving.

Following on from the earlier post, I now want to separate the electronics tray from the main lathe base. I thought I read somewhere else that this is achieved by putting the ORAC-1 on its back, undoing the tray fixing screws around the edge of the unit and dropping the electronics tray down on it's...
by PDobson
Tue 14 Jun , 2016 9:30 am
Forum: Orac
Topic: ORAC Z axis not driving.
Replies: 9
Views: 12556

Re: ORAC Z axis not driving.

OK Thanks, I'll persevere with changing the two output transistors and see what happens.
by PDobson
Mon 13 Jun , 2016 10:49 am
Forum: Orac
Topic: ORAC Z axis not driving.
Replies: 9
Views: 12556

Re: ORAC Z axis not driving.

Thanks Martin, that is great, As a result I have found two of the four power transistors have gone short circuit. To check out the operation of the entire card it would be great if I can find the circuit schematic for the CD20 card. Is this information available?? Standard googles searches drew a bl...
by PDobson
Sun 12 Jun , 2016 21:57 pm
Forum: Orac
Topic: ORAC Z axis not driving.
Replies: 9
Views: 12556

Re: ORAC Z axis not driving.

I have just checked the state of the drive cards. Each has 4 LEDs. The X drive that works the top Green LED is on and responds to commands to move. The Z drive card has the third LED down from the top (Red) permenantly on. No other LEDs respond to any move commands. What does the third LED down sign...
by PDobson
Sun 12 Jun , 2016 21:39 pm
Forum: Orac
Topic: ORAC Z axis not driving.
Replies: 9
Views: 12556

ORAC Z axis not driving.

I have read the thread on the Z and X axis not working, but in my case it is the Z axis only. (X and spindle are fully operational) On the manual move page the Z position indexes as you manually select to move the Z axis but no actual movement. I have not yet split the lathe from the electronics dec...