509,984 active members
2,869 visitors online
Register for free
Login
Results 1 to 10 of 10
  1. #1
    Registered
    Join Date
    Apr 2011
    Posts
    46

    Prolight 3000 questions

    Hi.

    I recently picked up a Intelitek/Light-Machines Prolight 3000 turning center.

    Unfortunately it's missing a few pieces.

    1) The tooling plate for the tool-turret. #12 in the attached image. Intelitek has one in stock and the list price is $1000. I confirmed via the parts diagram and part number that we were discussing the same part. They offered to give it to me for half price ($500) but that is still more than I paid for the entire lathe plus I'm pretty sure I can find a complete used turret for less than this. My question is whether it's a generic part? Else I guess I'm going to have to see if someone would be willing to supply dimensions so I could fabricate a replacement. I'm located in Portland, Oregon.


    2) It is missing the original chuck. I think OEM was a 4" 3-jaw which is large enough for my needs. From images online it looks like the original may use a threaded backplate which the chuck mounts to, rather than the chuck itself being directly 2-1/4 threaded. I'm not having much luck finding an online source for a 4" 2-1/4"/8 threaded backplate. 6" seems common in that thread size.


    3) It came with some 5C collets but I'm missing the drawbar/collet-closer. I see someone else inquired about making one here: https://www.cnczone.com/forums/bench...et-closer.html but nothing seemed to come of it.


    4) It came with a threaded 2-1/4" ring (pictured). I'm not certain what it's purpose is? To protect the spindle threads? The page in the manual showing collet operation shows the spindle threads exposed.


    5) No tailstock option looks to have been installed. Eventually like to pickup a tailstock. I see that EMCO guy has one on eBay but again more than I paid for the entire lathe. I'm guessing it's a custom item for this lathe? Has anyone created a replacement using a generic part? I couldn't find anything googling.


    The seller is trying to locate the above missing parts which is very generous of them but I'm mentally preparing myself to be disappointed. I'm envious of the past surplus listings I'm seeing where the unit is fully complete ;-)

    Thanks!

    Tony

  2. #2
    Registered
    Join Date
    Apr 2011
    Posts
    46

    Re: Prolight 3000 questions

    I guess not many people have one of these.

  3. #3
    Registered
    Join Date
    Oct 2013
    Posts
    485

    Re: Prolight 3000 questions

    Tony,

    It looks like you got the machine for a bargain price but it wasn't complete. Those missing parts are very important so it may be why the machine was priced so reasonably. Unless you're tooled up to make all the missing parts I would think it a better deal to cut your losses and head in a different direction.


    Stuart
    "THE GRIZZ" photo album - https://goo.gl/photos/yLLp61jooprtYzFK7
    Youtube - https://www.youtube.com/channel/UCT2lq9obzEnlEu-M56ZzT_A

  4. #4
    Registered
    Join Date
    Jul 2005
    Posts
    163

    Re: Prolight 3000 questions

    Don't give up on the machine just yet - it's a very nice piece of kit. I have two, one complete with original control, and 1 with no control on it.

    Mine both came with no tailstock - very custom and odd item, been eyeing that one on ebay for a while, but can't bring myself to pay that much for it... It's such a short mahine, you would mostly use it for a chucker-type lathe anyway.

    They both also came without turrets, but that's not a problem - you can easily set it up for gang-tool holders, or for QC toolpost changing. The 3 larger tapped holes in the cross-slide are for bolting toolposts into. If yours has the T-slots instead, you can use them to hold your gang-tool holders. Gang tooling has the advantage of faster toolchanges, since you are not waiting for the turret to rotate to the correct tool - it's not a fast operation on these small lathes. The turret tool plate would have to be custom-made, it wouldn't be generic.

    The chuck on mine (seems original) is a 3-jaw, 4" chuck, Bison brand. It's a model 3204-4", and bolts onto a mounting plate from the back, then is screwed onto the spindle. If you can find any backing plate in the correct thread, you can machine it down to fit the chuck. Even if you have to take it down from 6", you can do that, and it only has to be done once.

    The spindle itself has the 5C bore, which I love about this machine. The manual drawtube I don't have, but have found that the ID of the spindle is a little bit under 1.375". I happen to have a Hardinge manual 5C drawtube from an old DV59, and those are slightly larger than 1.375", so it won't fit. However, the length seems pretty close, so I may take a chance and turn the Hardinge drawtube down a few thou to make it fit. It's not a really hard piece to make, so if you have any access to other lathes, you might want to try making one, or go the route I mentioned, and make one from an old Hardinge drawtube. Or, as I plan to do on the second lathe, install a Royal air collet closer, and make it a production machine!

  5. #5
    Registered
    Join Date
    Apr 2011
    Posts
    46

    Re: Prolight 3000 questions

    Thanks for the reply. Don't worry, not going to give up on it, I'd been looking for one for a while.

    Mine has the t-slots. I'm hoping I can find someone who'll take measurements of the turret tooling plate so I can machine a copy.

    I'd heard that the chuck was a Bison, thanks for confirming and providing the part#. Even used they are quite expensive on eBay. I may have to find a cheaper brand.

    Thanks for the ID on the drawtube. If you adapt yours i'd be curious on what length you ended up with. I've not looked inside the spindle so im unsure if the original Light Machines closer was for external threaded collets or internal.

    Any idea what the ring is (on the spindle) in the first picture?

    Thanks

    Tony

    Sent from my MI PAD 4 PLUS using Tapatalk

  6. #6
    Registered
    Join Date
    Apr 2011
    Posts
    46

    Re: Prolight 3000 questions

    Quote Originally Posted by DSpeck View Post
    If you can find any backing plate in the correct thread, you can machine it down to fit the chuck. Even if you have to take it down from 6", you can do that, and it only has to be done once.
    What is the possibility of using a larger chuck than 4" on this machine? Say a 6" self-centering 3-jaw?

  7. #7
    Registered
    Join Date
    Dec 2006
    Posts
    78

    Re: Prolight 3000 questions

    Hey,

    I have one. Not running yet, but the plan is soon.

    The tailstock mounts on a piece of square stock that is attached at one end to the headstock and at the other to the the slab that the linear rails and ball screw are attached to.

    I took mine off because it looked like it would mainly be in the way. Keeping it, because, you know, reasons. And shafts. Shortish ones.

    That threaded collar is to protect the chuck threads when you are using collets.

    I have the tool changer and the bison chuck, but not the collet closer.

    Someone on ebay is selling collet tubes in any length for reasonable prices. That would be a good start to a simple closer.

    I have the matching Prolight mill which I was using with the original stepper driver box. I made an interface with an ebay breakout board. The pin mappings are available on the zone somewhere. That worked well until the lm7(?) Chips blew. The spindle and coolant relays failed first. It's junk now.

    I then upgraded to microstepping drives and the torque loss from those compared to the orignal half-step drives was disappointing. The original old blue steppers I had already replaced with Vextas.

    Which brings me to the lathe, I'm going to try some integrated servos and if they are awesome i will upgrade the mill too.

    How is your machine coming?

  8. #8
    Registered
    Join Date
    Jul 2005
    Posts
    163

    Re: Prolight 3000 questions

    The max you'd be able to use is really a 5" chuck. With a 6" chuck, you could spin it, but it wouldn't allow you to open the jaws much wider than the chuck OD, since that would hit the way covers.

    Lathe drawtubes are all for external threads - the internal threads on a 5C collet are for collet stops, so you can insert a workpiece to a specific length every time. If you made a drawbar for the internal threads, you would restrict the diameter of the work that would pass through it.

  9. #9
    Registered
    Join Date
    Apr 2011
    Posts
    46

    Re: Prolight 3000 questions

    Quote Originally Posted by DSpeck View Post
    The max you'd be able to use is really a 5" chuck. With a 6" chuck, you could spin it, but it wouldn't allow you to open the jaws much wider than the chuck OD, since that would hit the way covers.
    I've been looking for a used 4" chuck but I've read quite a few posts advising that a new Chinese chuck can be preferable to a worn used higher quality one. I certainly can't afford a Bison. Or rather I can but given that the entire lathe cost me about $300 I don't want to spend that much ....

    Never bought from this company, they sell pre-finished backplates:

    - https://allindustrial.com/all-indust...-lathe-chucks/

    Not sure how great an idea the above is for accuracy vs something like this; of course I'd have to turn it down on the 3000:

    https://littlemachineshop.com/produc...ProductID=1923

    Lathe drawtubes are all for external threads - the internal threads on a 5C collet are for collet stops, so you can insert a workpiece to a specific length every time. If you made a drawbar for the internal threads, you would restrict the diameter of the work that would pass through it.
    Yeah, that was obvious. I'm not sure what I was thinking.

  10. #10
    Registered
    Join Date
    Apr 2011
    Posts
    46

    Re: Prolight 3000 questions

    Quote Originally Posted by dan_the_welder View Post
    Someone on ebay is selling collet tubes in any length for reasonable prices. That would be a good start to a simple closer.
    You have the listing URL?

    I see these but they are 24" and the OD may be slightly too large based on Dspeck's comment: 'the ID of the spindle is a little bit under 1.375"'
    https://rover.ebay.com/rover/0/0/0?m...2F184077871997

Similar Threads

  1. Replies: 1
    Last Post: 03-25-2019, 07:21 PM
  2. Replies: 0
    Last Post: 06-06-2018, 01:50 PM
  3. Prolight 3000 CNC Turning Center questions
    By abeship in forum Benchtop Machines
    Replies: 13
    Last Post: 05-01-2018, 07:45 PM
  4. Prolight 3000 lathe retrofit
    By kweierbach in forum Benchtop Machines
    Replies: 16
    Last Post: 04-20-2016, 10:12 PM
  5. CNC proLIGHT 3000 lathe
    By SRTSS in forum Machines running Mach Software
    Replies: 0
    Last Post: 03-17-2013, 04:40 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •