Search found 104 matches

by triac
Sat 10 Feb , 2024 0:11 am
Forum: Novamill
Topic: Spindle motor replacement
Replies: 2
Views: 283

Re: Spindle motor replacement

Did you locate another motor yet ?
I ask because I have a spare original motor from a Denford machine, not sure it is the same as you need though.
It runs very quitely and is smooth, 180v PMDC

Triac
by triac
Fri 05 May , 2023 14:17 pm
Forum: Orac
Topic: Cutting left hand threads
Replies: 2
Views: 5175

Re: Cutting left hand threads

Hi Steve Thanks for your reply. I should have added "using the original programming method", the threaading cycle G33 doesn't give provision to thread from the chuck to tailstock, also no G95 available to just do a cylic program. I wanted to use the Orac for this job but will have to run it on my Co...
by triac
Fri 05 May , 2023 0:24 am
Forum: Orac
Topic: Cutting left hand threads
Replies: 2
Views: 5175

Cutting left hand threads

Hi All

Anyone been able to cut left hand threads on an Orac cnc ?

Marcus
by triac
Fri 19 Aug , 2022 14:07 pm
Forum: Orac
Topic: Another Orac retrofit, re-using spindle encoder?
Replies: 5
Views: 5663

Re: Another Orac retrofit, re-using spindle encoder?

Hi
Could you please post some pics of the wiring and connection you finally ended up with to get all working OK ?
by triac
Thu 04 Nov , 2021 17:14 pm
Forum: Orac
Topic: Original orac motor
Replies: 4
Views: 6181

Re: Original orac motor

Bit late but connect as is, power supply from VFD 1 leg to each set of linked terminals.
If direction is wrong interchange any 2 lines.
by triac
Mon 19 Apr , 2021 22:33 pm
Forum: Orac
Topic: Printing the program old DOS software
Replies: 0
Views: 6233

Printing the program old DOS software

I am still using an Orac by writing the program using the original DOS software, I would like to be able to print the programs written for reference in the workshop.
There is a PRINT option in the program but I am unable to get it to work, anyone have an idea to try ?

Marcus
by triac
Thu 14 May , 2020 14:39 pm
Forum: Orac
Topic: Problem with my spindle not starting
Replies: 2
Views: 7030

Re: Problem with my spindle not starting

Think you asked this question over on the iO Groups Denford Orac group, turned out to be faulty diode/s on the 24v PSU to the VFD, they were short cct so causing the blown fuse, glad to say it's now up and running.

Triac
by triac
Tue 27 Aug , 2019 19:58 pm
Forum: Machines
Topic: Speed and Feed GUIDE for Denford machines
Replies: 6
Views: 20537

Re: Speed and Feed GUIDE for Denford machines

I would add it is always a good idea to blow the chips away so the cutter doesn't have to cut them again, also a lubricant will help as it prevents build up on the cutter flute/s which if that happens it will leave a very poor finish. Flood coolant does both jobs but is not possible on all machines....
by triac
Thu 22 Aug , 2019 22:17 pm
Forum: Denford Classifieds
Topic: Orac electronics for sale
Replies: 6
Views: 6916

Re: Orac electronics for sale

Which board do you need as I have some to sell off. ?
Triac
by triac
Wed 01 Aug , 2018 21:27 pm
Forum: Orac
Topic: Orac Modernization Spindle Speed VFD
Replies: 1
Views: 6776

Re: Orac Modernization Spindle Speed VFD

Hi Rob

My Orac is using an original VFD and will take the spindle to 2500, the previous owner must have adjusted the pots to allow
the VFD to go higher than the original settings which state spindle speed of 2000 rpm.

Marcus
by triac
Thu 22 Mar , 2018 23:17 pm
Forum: Denford Classifieds
Topic: Orac electronics for sale
Replies: 6
Views: 6916

Re: Orac electronics for sale

Have you done the conversion already and used the original steppers and motor ?
If so do you have details of the work done ?

Thanks, triac
by triac
Thu 22 Feb , 2018 12:20 pm
Forum: Orac
Topic: Z and X and spindle all of a sudden not working
Replies: 15
Views: 16548

Re: Z and X and spindle all of a sudden not working

It's an electronic trip and should reset when the Em stop is activated. Something I had previously was metal chips got into the machine light switch and shorted connections, this prevented the axis operating in any way. Martin advised the cure for my problem. Just pull the cover off and check all co...
by triac
Tue 20 Feb , 2018 10:56 am
Forum: Orac
Topic: Z and X and spindle all of a sudden not working
Replies: 15
Views: 16548

Re: Z and X and spindle all of a sudden not working

When viewing the lathe from the back the motor control board is positioned on the extreme right side of the plate.

Marcus
by triac
Mon 19 Feb , 2018 0:12 am
Forum: Orac
Topic: Z and X and spindle all of a sudden not working
Replies: 15
Views: 16548

Re: Z and X and spindle all of a sudden not working

Andy, re the X limit switch, read the last para in my last reply (remove the 2 screws holding the cross slide top cover to view the X limit) When you turn the machine power switch on you should hear a contactor close, control circuits are switched ON/OFF by the relay so if not closing you will have ...
by triac
Sun 18 Feb , 2018 20:09 pm
Forum: Orac
Topic: Z and X and spindle all of a sudden not working
Replies: 15
Views: 16548

Re: Z and X and spindle all of a sudden not working

Hi Andy, make sure the EM stop is reset otherwise nothing will work, check you are in Manual mode and hold in the override switch on the underside, holding the switch in use the axis buttons to move the carriage off the limit switch/es. To move off the limits move the Z towards tailstock, move X axi...
by triac
Tue 26 Dec , 2017 11:20 am
Forum: Orac
Topic: Rotating tool turret command within program.
Replies: 2
Views: 7156

Re: Rotating tool turret command within program.

Thanks for the info Steve, will pass on the details.

Emgee
by triac
Sun 17 Dec , 2017 1:35 am
Forum: Orac
Topic: Rotating tool turret command within program.
Replies: 2
Views: 7156

Rotating tool turret command within program.

Help please.

Using the original DOS editing program on an Orac how can I tell the tool turret to rotate within a program ?

Marcus
by triac
Tue 14 Mar , 2017 19:58 pm
Forum: Orac
Topic: Orac Programmed from Laptop & Associated Wiring Connections.
Replies: 28
Views: 38761

Re: Orac Programmed from Laptop & Associated Wiring Connecti

Colin Old Machine Software ZIP file, open ORAC file and if DOS will work in your system or with DOSBOX downloaded you will be able to write programs and download to and receive programs from the lathe. Works for me in WinXP OK. [attachment=0]OLD_MACHINE_SOFTWARE.zip[/attachment] This file was downlo...
by triac
Mon 06 Mar , 2017 0:36 am
Forum: Orac
Topic: Orac Programmed from Laptop & Associated Wiring Connections.
Replies: 28
Views: 38761

Re: Orac Programmed from Laptop & Associated Wiring Connecti

Hi David

So you are only using Linux for file transfer and storage, not compiling programs in Linux to use with the Orac. ?

Emgee
by triac
Sun 05 Mar , 2017 23:19 pm
Forum: Orac
Topic: Orac Programmed from Laptop & Associated Wiring Connections.
Replies: 28
Views: 38761

Re: Orac Programmed from Laptop & Associated Wiring Connecti

Hi David

Interested to know if your Orac is still in standard form as this is the first time i've heard of anyone claiming Linux or Mach control of the standard machine.
Are you sure your Orac hasn't been converted before you aquired it ?

Emgee