Search found 40 matches
- Fri 24 Feb , 2017 17:15 pm
- Forum: Triac
- Topic: Toolchanger plans
- Replies: 0
- Views: 2635
Toolchanger plans
Hi, I just became the new owner of a mid 90s Triac PC. Sadly it doesn't have a toolchanger. I'm thinking about making one and was wondering if there's a complete set of drawings out there? I've seen drawings of the tool holders and converting the drawbar to pneumatic operation, but nothing about the...
- Tue 27 Sep , 2016 22:27 pm
- Forum: Orac
- Topic: X-axis leadscrew backlash
- Replies: 0
- Views: 8405
X-axis leadscrew backlash
Hello, I was doing some work on my Orac today when I noticed a lot of backlash on the x-axis. I ended up taking the whole assembly apart, and I realised that that the x-axis leadscrew was actually spinning around inside the coupling which attaches to the timing pulley. I assumed it must be attached ...
- Mon 28 Jul , 2014 7:36 am
- Forum: Orac
- Topic: Lead screw pitch and pulley ratios
- Replies: 1
- Views: 4722
Lead screw pitch and pulley ratios
Hi,
I'm sure this information is out there somewhere, but I can't find it, and I'm trying to avoid taking my lathe apart to count timing pulley teeth, so... Can anyone tell me what the pitch of the two lead screws is, and what the ratios are on the standard pulleys (for both axes)?
Thanks!
-Luke
I'm sure this information is out there somewhere, but I can't find it, and I'm trying to avoid taking my lathe apart to count timing pulley teeth, so... Can anyone tell me what the pitch of the two lead screws is, and what the ratios are on the standard pulleys (for both axes)?
Thanks!
-Luke
- Mon 09 Jun , 2014 18:29 pm
- Forum: Orac
- Topic: Spindle encoder screw size?
- Replies: 2
- Views: 4942
Spindle encoder screw size?
Hi, I lost one of the spindle encoder (the perforated metal plate on the spindle) screws on my Orac, and I can't work out what size it is in order to replace it. The screws are 2.7mm in diameter approximately, but I can't find an obvious match to a non-metric thread size. Can anyone help? Thanks, Luke
- Mon 15 Jul , 2013 17:33 pm
- Forum: Orac
- Topic: Orac spindle nose taper
- Replies: 31
- Views: 27350
Re: Orac spindle nose taper
Well, in theory it is possible... But how do you plan on setting the angle of 7.125 deg ??? I don't know what kind of lathe you have but, I don't have such precision on mine. Also, You could bring the headstock of the ORAC with you. It is small enough and fairly easy to remove. Just 4x M8 nuts / bo...
- Mon 15 Jul , 2013 15:52 pm
- Forum: Orac
- Topic: Orac spindle nose taper
- Replies: 31
- Views: 27350
Re: Orac spindle nose taper
One complication for me is that for about a month I have access to a really well equipped workshop with a couple of large lathes and a bridgeport clone. Unfortunately geographically no-where near the Orac. What I'm thinking about is this: Take the Orac 3-jaw chuck with me, and on a second lathe face...
- Mon 15 Jul , 2013 14:09 pm
- Forum: Orac
- Topic: Orac spindle nose taper
- Replies: 31
- Views: 27350
Re: Orac spindle nose taper
As far as I've been able to find out it is a variation of the DIN 55021 spindle nose standard. The standard starts at 3" (size 3), so the Compact 8/Orac is smaller than the definition of the standard. However, the taper is the same on all sizes; 7 degrees, 7 minutes and 30 seconds, or 7.125 degrees...
- Mon 15 Jul , 2013 14:04 pm
- Forum: Orac
- Topic: Orac spindle nose taper
- Replies: 31
- Views: 27350
Re: Orac spindle nose taper
Yes I've just realised that myself!
But you could still make the morse taper hollow. Like this (attached)
Obviously it's a compromise between wall thickness and smaller clearance diameter.
The ideal would be to know what the outer taper is - seems crazy that no one knows!
-Luke
But you could still make the morse taper hollow. Like this (attached)
Obviously it's a compromise between wall thickness and smaller clearance diameter.
The ideal would be to know what the outer taper is - seems crazy that no one knows!
-Luke
- Mon 15 Jul , 2013 12:25 pm
- Forum: Orac
- Topic: Orac spindle nose taper
- Replies: 31
- Views: 27350
Re: Orac spindle nose taper
I've been wondering about fitting (or making) a collet chuck for my Orac. It looks like no-one knows definitively what the taper is on the spindle nose. I'm wondering about simply using the morse 3 taper on the inside of the spindle to provide concentric registration, and using the m8 bolt holes to ...
- Sun 16 Jun , 2013 14:11 pm
- Forum: Orac
- Topic: Automatic tool changer - tool plate dimensions?
- Replies: 8
- Views: 9195
Re: Automatic tool changer - tool plate dimensions?
Hi Angel-tech, any luck with those dimensions?angel-tech wrote:I've got an original tool changer, i'll try to get the dimensions for you.
Thanks!
- Mon 03 Jun , 2013 10:29 am
- Forum: Orac
- Topic: Automatic tool changer - tool plate dimensions?
- Replies: 8
- Views: 9195
Re: Automatic tool changer - tool plate dimensions?
That would be great, thanksangel-tech wrote:I've got an original tool changer, i'll try to get the dimensions for you.
- Sun 02 Jun , 2013 21:23 pm
- Forum: Orac
- Topic: Automatic tool changer - tool plate dimensions?
- Replies: 8
- Views: 9195
Re: Automatic tool changer - tool plate dimensions?
Thanks for those insights Emgee. I've finally got a bit of time to work at this and I've been playing around with various ideas for a toolplate with the hope of minimising the boring bar crashing into the chuck issue. It'd still be useful to have the original Orac toolplate dimensions though, if for...
- Fri 19 Apr , 2013 12:13 pm
- Forum: Orac
- Topic: Automatic tool changer - tool plate dimensions?
- Replies: 8
- Views: 9195
Re: Automatic tool changer - tool plate dimensions?
Hi Emgee, Thanks for the post. Actually I've seen your toolchanger - I posted some questions in the thread you linked to a few months ago. I noticed that you said you had issues with tool clearance with that tool plate, hence I'm trying to get the original Orac tool plate dimensions. I think the des...
- Thu 18 Apr , 2013 22:01 pm
- Forum: Orac
- Topic: Automatic tool changer - tool plate dimensions?
- Replies: 8
- Views: 9195
Automatic tool changer - tool plate dimensions?
Hello, I've got access to a very well equipped workshop for the next few weeks and I've decided to take advantage of it to build an automatic tool changer for my Orac. Since the existing design obviously works perfectly well I thought I'd keep things simple and try and copy it as much as possible. W...
- Sat 06 Oct , 2012 13:14 pm
- Forum: Orac
- Topic: Original stepper wiring
- Replies: 5
- Views: 4980
Re: Original stepper wiring
Hi Angel-tech, Thanks for your earlier post. Just wondering if you'd had any luck identifying pairings? I'd of thought this was a readily available piece of information, since presumably anyone upgrading an orac needs to go through this if they're using the original steppers? Can't find any mention ...
- Fri 28 Sep , 2012 16:35 pm
- Forum: Orac
- Topic: Original stepper wiring
- Replies: 5
- Views: 4980
Re: Original stepper wiring
There are 8 wires. The colours are Red Black Orange White/orange White/red Yellow Black/grey Yellow/white And the original pairings were Red & white/yellow Yellow and white/red Orange and black/grey Black and white/orange But I don't know what these pairings are (A+, B- etc), and I'm a bit perplexed...
- Fri 28 Sep , 2012 16:11 pm
- Forum: Orac
- Topic: Original stepper wiring
- Replies: 5
- Views: 4980
Original stepper wiring
Hi, Can someone tell me which wires on my original orac stepper motors should be paired together for parallel bipolar operation, and which of these pairs is A+, A- etc? I tried using the method outlined here ( http://www.piclist.com/techref/io/stepper/wiresmeterbattery.htm ) to identify them, but th...
- Tue 18 Sep , 2012 22:26 pm
- Forum: Denford Classifieds
- Topic: Denford Orac 1983, Automatic tool changer wanted.
- Replies: 3
- Views: 4398
Re: Denford Orac 1983, Automatic tool changer wanted.
Hi Emgee,
I've been watching the pictures of your tool changer appear on photobucket with interest. Do you have any drawings/CAD models of the tool changer? I'd be very interested to see them - I'm thinking of building one myself.
Thanks,
Luke
I've been watching the pictures of your tool changer appear on photobucket with interest. Do you have any drawings/CAD models of the tool changer? I'd be very interested to see them - I'm thinking of building one myself.
Thanks,
Luke
- Sun 08 Jul , 2012 19:12 pm
- Forum: Orac
- Topic: Stepper drivers and power supply for Orac
- Replies: 3
- Views: 3645
Re: Stepper drivers and power supply for Orac
Ok, thanks. Should I replace the large electrolytics on the power supply?
Also what voltage does the open frame transformer put out?
Also what voltage does the open frame transformer put out?
- Fri 06 Jul , 2012 20:44 pm
- Forum: Orac
- Topic: Stepper drivers and power supply for Orac
- Replies: 3
- Views: 3645
Stepper drivers and power supply for Orac
Hi, I've recently obtained an Orac which I'm intending to refit with new electronics. It has two CD20s, but I'm pretty sure one is shot (smoke came off it when I powered it up), so I figure I'll fit new stepper drivers. The VFD is working, and I'm assuming the power supply is in good shape, but I'm ...