Help - Red and Black 700x500 Laser Rotary Users

General Laser Usage Topics
Doug Fisher
Posts: 467
Joined: Sat Aug 20, 2016 12:42 pm
Location: Atlanta, Georgia, USA

Re: Help - Red and Black 700x500 Laser Rotary Users

Post by Doug Fisher » Sun Jan 08, 2017 12:28 pm

I had a minute to go down and test Pierre's recommendation. He idea did appear to be a viable workaround for larger items so I do thank him!

During my relatively quick experimenting session there were a couple of things I noticed that are worth mentioning for other people who already own the chuck rotary or who are considering it. It appears there will be a non-workable range of diameter that is too thick to work when the rotary is positioned upright and too thin when the rotary is positioned on its side. An example would be the gray, red and black tube up in my second image in my original post for this thread. You can see why this is so when looking at the following new picture of the beer bottle inserted into the rotary after it has been placed on its side. The bed is now required to be raised up so high that the top side edge of the rotary is pressed up against the underside of the gantry, thus the gap cannot be closed any more (see the two red arrows). This gap is right at my focus gauge gap (maybe +.5 to 1 mm more than ideal), therefore, any object narrower would create too wide of a focus gap.
Beer Bottle Gantry Resting.JPG
Beer Bottle Gantry Resting.JPG (137.39 KiB) Viewed 217 times
Here is a large jar inserted into the jaws. I am guessing its diameter should be at least as large as the 30 oz. Yeti. One thing to remember is that the laser's nozzle will now be bounded by a three sided steel box (see red lines). If the power goes out, you power the laser off and on intentionally, you manually reset your machine, or you have your origin set somewhere outside of this box, you could have a crash of the nozzle when the rotary attachment is placed in the laser.
Three Sided Box.JPG
Three Sided Box.JPG (177.79 KiB) Viewed 217 times
A thought just occurred to me that I might try to rotate the rotary attachment 180 degrees to the other direction and keep the rotary's base positioned all the way to the right side of the cutting bed to give the nozzle a clear "escape route." On second thought, that might make inserting and removing objects kind of cumbersome and make the visual line of sight problematic though.

Here is a picture of a 20 oz Yeti inserted into the chuck and then the right side base of the rotary was shimmed to make the Yeti level. Notice how there is not a whole lot of extra space in the gap for more shimming when you look at the red "A" arrow that points to four small lines in the gap between the X axis gantry and the top side edge of the rotary attachment. The red "B" shows the larger gap at the non-shimmed end of the rotary.
Leveled Narrow Gap.JPG
Leveled Narrow Gap.JPG (135.41 KiB) Viewed 217 times
80 Watt 700mm x 500mm Ke Hui KH-7050 Laser (Similar to the Red Sail),T.R.
LaSea/EFR F2 Series laser tube, RuiDa RDC6442G EC controller, 2" lens, RDWorks v8.01.18, CW 5000 chiller, Chuck type of rotary attachment
Doug

Doug Fisher
Posts: 467
Joined: Sat Aug 20, 2016 12:42 pm
Location: Atlanta, Georgia, USA

Re: Help - Red and Black 700x500 Laser Rotary Users

Post by Doug Fisher » Sun Jan 08, 2017 12:48 pm

Ooooo... somebody tell me no and that my concept is wrong. I am thinking about cutting out some sections that would allow the gantry and nozzle to drop closer to the chuck. These steel endplates are so thick that I don't think it would affect the integrity of the unit. They would be a bear to cut but I have a reciprocating saw with some steel cutting blades that has been itching for some action. :shock:
Cutouts.JPG
Cutouts.JPG (152.56 KiB) Viewed 214 times
80 Watt 700mm x 500mm Ke Hui KH-7050 Laser (Similar to the Red Sail),T.R.
LaSea/EFR F2 Series laser tube, RuiDa RDC6442G EC controller, 2" lens, RDWorks v8.01.18, CW 5000 chiller, Chuck type of rotary attachment
Doug

pierre dradin
Posts: 49
Joined: Sun Oct 30, 2016 9:50 am
Location: Baillonville, Belgium
Contact:

Re: Help - Red and Black 700x500 Laser Rotary Users

Post by pierre dradin » Sun Jan 08, 2017 1:00 pm

You can not adjust the nose manually, I see a screw, it's a fixed head? or Cut with a hacksaw the red lines
LT1290, 1200*900 100w Beijing EFR laser tube,
before leetron 6585 and lasercut 6.1 and now Ruida 6442 DSP RDWorks v8.01.18
cnc home made 750*560 350kg, Galaad, kress 1050
http://www.decoupecnc.be
Pierre dradin

Doug Fisher
Posts: 467
Joined: Sat Aug 20, 2016 12:42 pm
Location: Atlanta, Georgia, USA

Re: Help - Red and Black 700x500 Laser Rotary Users

Post by Doug Fisher » Sun Jan 08, 2017 1:34 pm

Thanks for pointing that out. In the past, I have only used that screw to release and fully remove the nozzle to get access to the lens to clean it. I can't remember if my lens assembly inserts into the "down tube" of the head or the nozzle assembly itself. If the lens sits in the nozzle assembly, then your suggestion will save me a lot of cutting of steel!
80 Watt 700mm x 500mm Ke Hui KH-7050 Laser (Similar to the Red Sail),T.R.
LaSea/EFR F2 Series laser tube, RuiDa RDC6442G EC controller, 2" lens, RDWorks v8.01.18, CW 5000 chiller, Chuck type of rotary attachment
Doug

pierre dradin
Posts: 49
Joined: Sun Oct 30, 2016 9:50 am
Location: Baillonville, Belgium
Contact:

Re: Help - Red and Black 700x500 Laser Rotary Users

Post by pierre dradin » Sun Jan 08, 2017 2:08 pm

Yes just see if the lens follow the movement
LT1290, 1200*900 100w Beijing EFR laser tube,
before leetron 6585 and lasercut 6.1 and now Ruida 6442 DSP RDWorks v8.01.18
cnc home made 750*560 350kg, Galaad, kress 1050
http://www.decoupecnc.be
Pierre dradin

Doug Fisher
Posts: 467
Joined: Sat Aug 20, 2016 12:42 pm
Location: Atlanta, Georgia, USA

Re: Help - Red and Black 700x500 Laser Rotary Users

Post by Doug Fisher » Sun Jan 08, 2017 4:36 pm

It appears that the lens tube assembly does actually function as you suggested. Excellent. I had not realized it had that versatility. Thank you!
80 Watt 700mm x 500mm Ke Hui KH-7050 Laser (Similar to the Red Sail),T.R.
LaSea/EFR F2 Series laser tube, RuiDa RDC6442G EC controller, 2" lens, RDWorks v8.01.18, CW 5000 chiller, Chuck type of rotary attachment
Doug

Michael Dunning
Posts: 42
Joined: Sun Nov 27, 2016 1:02 am
Location: Alabama USA

Re: Help - Red and Black 700x500 Laser Rotary Users

Post by Michael Dunning » Sun Jan 08, 2017 4:53 pm

With the nozzle removed you need to find an alternative method of attaching the air assist hose though, correct?
EBay Chinese 60W (45W actual) laser cutter, 700x500mm, (TR)
RDWorks V8.01.18 and V8.00.27
Michael

User avatar
fred ungewitter
Posts: 338
Joined: Tue Aug 16, 2016 2:55 pm
Location: East Central FL, USA
Country: USA
Nickname: fred
Laser Machine Make or Type: Redsail Clone
Laser Power: 60W
Laser Bed Size: 500 x 700
Home Position: TR
RDWorks Version: 8.01.18
Accessories: Chuck style rotary, 30 ma meter, home-spun office water cooler mod, muffin fan anti-condensate blower
Windows Version: Windows 7

Re: Help - Red and Black 700x500 Laser Rotary Users

Post by fred ungewitter » Sun Jan 08, 2017 5:03 pm

Until watching one of Thunder Laser's more recent videos, I had not considered that it's an easy matter to drop the nozzle and lens assembly the last few millimeters onto the focus tool, rather than try to jog the table up and down for the desired setting. If there's enough extension in the tube, one could compensate for these problems with the rotary device.
fred

Redsail clone 60w 700 x 500 REAL 60w Puri tube
home upper right, chuck type rotary 15000 pulse setting
RDW 8.01.18
Win7

Emblaser A3 4w diode laser
BCN3D Sigma Dual Extruder 3d printer
LMS Mini-mill
Cube 3rd gen 3d printer, universal filament mod
Under construction: OX CNC 1000x750 router

Doug Fisher
Posts: 467
Joined: Sat Aug 20, 2016 12:42 pm
Location: Atlanta, Georgia, USA

Re: Help - Red and Black 700x500 Laser Rotary Users

Post by Doug Fisher » Sun Jan 08, 2017 8:11 pm

Michael, thanks to Pierre's suggestion, I am just loosening the brass locking screw which then allows the nozzle with its attached shaft to slide down. The nozzle has a shaft coming out of it which extends up into the down tube coming out of the laser head. It appears there is about 17 mm of usable extension available. There is an issue with the design of mine though in that when you extend the tube down it is a bit wobbly the farther you extend it, so I would assume it may take some testing with Russ' nozzle testing tool to make sure the post-lens laser beam is correctly centered in the nozzle's aperture.
80 Watt 700mm x 500mm Ke Hui KH-7050 Laser (Similar to the Red Sail),T.R.
LaSea/EFR F2 Series laser tube, RuiDa RDC6442G EC controller, 2" lens, RDWorks v8.01.18, CW 5000 chiller, Chuck type of rotary attachment
Doug

Willy Ivy
Posts: 232
Joined: Tue Aug 09, 2016 10:07 am
Location: Pattison, Texas
Country: USA
Nickname: Willy
Laser Machine Make or Type: KH 7050
Laser Power: 60W
Laser Bed Size: 12" x 20"
Home Position: TL
RDWorks Version: v8.01.18
Accessories: Hot dog rotary
Windows Version: W7 Pro
Contact:

Re: Help - Red and Black 700x500 Laser Rotary Users

Post by Willy Ivy » Sun Jan 08, 2017 9:34 pm

Doug
Been out of town, just got home.
Was going to PM back but decided to post here as this may help others as well.
My machine came with hot dog rotary also.
I do not have slippage, I use masking tape at the opening side of glass or tumbler.
On the tumblers I use various sizes of tape rolls to slide onto the bottoms of the tumbler.
I then put about 1/4" shim under the right side of the rotary as to make it unlevel pushing the tumbler or glass to the left ever so slightly to keep it from walking while rotating.
If it is a flat tapered object, I place whatever blocks needed (as much as 4" sometimes) under the right side to make the object level to the laser head, then add the 1/4" again to push it to the left.
Hope this makes sense.
If time tomorrow I will set up a few and send better pics. Had this pic already on hand.
Attachments
iphone 006.JPG
iphone 006.JPG (1.94 MiB) Viewed 198 times
50w Chinese laser KH-7050, 500x300, TL, 2" lens, hot dog rotary
Modifications: 60w tube & power supply, honeycomb bed, amp meter, easy access mirrors
RDWorks V8.01.18, CorelDraw X6, W7 Pro
Pattison, Texas
http://dadburnitlaser.com
Willy

Post Reply

Who is online

Users browsing this forum: No registered users and 1 guest