Shop Floor Talk  

Go Back   Shop Floor Talk > Welding and Metalworking Forums > Machining

SFT Search:   
Reply
 
Thread Tools Display Modes
  #1  
Old 04-08-2006, 01:02 AM
X-ray's Avatar
X-ray X-ray is offline
Elite Member
 
Join Date: Jun 2004
Location: Northern Nevada
Posts: 1,419
Default Pull-down band-saws

The intent of this thread is to do what I can to help a fellow SFT'r who happens to use the same saw (Kama EV 996) by passing on what experiences I have gathered about the saw.

And if a discussion occurs, then it might serve also as information for others that may be looking into the pull-down style of band saws. Advertising promotional for a pull down type bandsaw

Sure the advertising claims the Kama as "the worlds most accurate band saw", this I would chalk up to advertising hyperbole. That is to say I did not get dead-nutz accuracy out've the box...it took alittle work

If you are finding your cuts off by an unacceptable amount start with following checklist:

1) material crooked or clamped crooked in vise
2) blade condition
3) turning lever not tightened
4) turning support not flush with stops
5) stops out've alignment
6) sliding blade guide support, not adjusted to size for cut
7) sliding blade guide support lever not tightened
8) too much or too little feed rate or pressure

A pull-down bandsaw's feed rate is done manually, and for each material type and shape there is an optimum pull force- things will get better with 'trigger' time.
For me it has been forcing myself to slow down or lessen the down force I apply to the bow. Looking at the chips and listening to the sounds during the cut have been the most help in judging the pressure required. Sometimes seeing the chips while cutting is not the easiest because they get washed off by the coolant flow.
Attached Thumbnails
Click image for larger version

Name:	zero degree stop.JPG
Views:	893
Size:	67.0 KB
ID:	11554   Click image for larger version

Name:	baby combo square to true vise to blade.JPG
Views:	833
Size:	74.0 KB
ID:	11555   Click image for larger version

Name:	5-8 tpi blade setting up to cut a test section.JPG
Views:	818
Size:	65.4 KB
ID:	11556   Click image for larger version

Name:	first cut finished.JPG
Views:	725
Size:	54.6 KB
ID:	11557   Click image for larger version

Name:	sectioned piece on reference surface.JPG
Views:	777
Size:	64.7 KB
ID:	11558  

__________________
Does anything happen to me? I take what comes... -Marcus Aurelius

Last edited by X-ray; 04-08-2006 at 01:11 AM.
Reply With Quote
  #2  
Old 04-08-2006, 08:05 AM
Team DeSade's Avatar
Team DeSade Team DeSade is offline
Elite Member
 
Join Date: May 2005
Location: Acworth, Ga.
Posts: 1,124
Send a message via AIM to Team DeSade
Default

Good info there X-ray. Hopefully it won't be too long before I can buy one and look this thread up to get it cuttin' straight.

Just to make sure this gets found in future searches, I'm adding in the words horizontal bandsaw as a common synonym.
__________________
---------
Terry
Reply With Quote
  #3  
Old 04-08-2006, 10:12 AM
Cavalry's Avatar
Cavalry Cavalry is offline
Below Wholesale
 
Join Date: Jul 2005
Location: Evil Empire State
Posts: 9,018
Default

ok someone educate me.... I read that article above. I guess I dont understand why you would want a pull down over a hyd feed saw? There will be times at work I will sit at the saw all day. I cant imagine if I was feeding it for 8 hours!!

given my saw is a ancient K-zoo and is inaccurate as all hell. by watchign the chips and listening to it I can judge the best feed speed for the material.

I guess my question is why dont they make an accurate saw like the above with a full power feed? I see there is a gravity assist option on some?
Reply With Quote
  #4  
Old 04-08-2006, 11:32 AM
JT Metalworks's Avatar
JT Metalworks JT Metalworks is offline
Banned
 
Join Date: Jan 2006
Location: Mpls
Posts: 579
Default

These are being used like a chop saw would traditionally function. There's no need to fine tune a cylinder's adjustment if you're only making 3 cuts. Transitioning from some aluminum extrusion (pull `er down fast) and some wide flange I (slow and steady) is a matter of putting the stock on the table and clamping it.

They're in the same category as the cold and dry cut saws are being marketed in - only they have the distinct advantage of larger capacity for the same floor space, and much cheaper consumables (blades). The larger capacity is the trade off for not being as fast as the circular saws.

If you were doing a lot of large stock, then you wouldn't likely be looking at something this small. There's another saw of this size called the Acrobat that's fully automatic as well though - I think X-ray also posted a link to it.
Reply With Quote
  #5  
Old 04-08-2006, 11:59 AM
KB Fabrications
Guest
 
Posts: n/a
Default

Ray,

While I don't have a saw like that, I think you did a nice job with this post. Those saws are nice units and wouldn't be around if there wasn't a market for them. Your post will be valuable info for someone who has the saw or is looking to get one.
Reply With Quote
  #6  
Old 04-08-2006, 12:59 PM
X-ray's Avatar
X-ray X-ray is offline
Elite Member
 
Join Date: Jun 2004
Location: Northern Nevada
Posts: 1,419
Default

More pics, but got to split for daughters soccer game- somebody fill in the commentary.

good job starting bs session guys, talk with you later
Attached Thumbnails
Click image for larger version

Name:	cut one using spacer under.JPG
Views:	648
Size:	75.7 KB
ID:	11579   Click image for larger version

Name:	sliding blade guide.JPG
Views:	577
Size:	116.2 KB
ID:	11580   Click image for larger version

Name:	2nd cut.JPG
Views:	585
Size:	75.7 KB
ID:	11581   Click image for larger version

Name:	3rd cut now we can make some hay.JPG
Views:	579
Size:	70.1 KB
ID:	11582   Click image for larger version

Name:	3rd cut finished.JPG
Views:	577
Size:	55.2 KB
ID:	11583  

__________________
Does anything happen to me? I take what comes... -Marcus Aurelius
Reply With Quote
  #7  
Old 04-08-2006, 01:05 PM
cutter's Avatar
cutter cutter is offline
Curmudgeon
 
Join Date: Jun 2004
Location: Lubbock,Texas
Posts: 32,632
Default

Good show, X-ray. I have installed this link in the project index forum.
__________________
cutter
Housekeeping Staff: the Gatekeeper
Director of Policy, Syntax and Grammar (by appointment)

"Dr. Chandran, will I dream?"

Just Keep Walking

"Passionate hatred can give meaning and purpose to an empty life. Thus people haunted by the purposelessness of their lives try to find a new content not only by dedicating themselves to a holy cause but also by nursing a fanatical grievance. A mass movement offers them unlimited opportunities for both."
Eric Hoffer The True Believer 1951
Reply With Quote
  #8  
Old 04-08-2006, 01:44 PM
JT Metalworks's Avatar
JT Metalworks JT Metalworks is offline
Banned
 
Join Date: Jan 2006
Location: Mpls
Posts: 579
Default

These guys make the Acrobat, even though it's not listed in their line-up yet.

http://www.pilous.cz/english/pas_pily_e.htm
Reply With Quote
  #9  
Old 04-08-2006, 02:49 PM
X-ray's Avatar
X-ray X-ray is offline
Elite Member
 
Join Date: Jun 2004
Location: Northern Nevada
Posts: 1,419
Default

Random pictures. One is the 0° stop with the hex jam nut backed off from the turning support. This allows the user to set the stop bolt stick-out.

The previous series of pictures, showed the process I used to take two 4' x 6" pieces of aluminum and turn them into 6" x 2" weld practice material. The 6" wide strips were sheared at the supplier from a 4' wide sheet. The sheared edge is not as straight as the factory edge, so inaccuracy was already in the material before it reached my saw. One could use the cutting method in the '1st cut' to minimize this.
Attached Thumbnails
Click image for larger version

Name:	stop hex jam nut.JPG
Views:	391
Size:	42.5 KB
ID:	11614   Click image for larger version

Name:	chips note part position.JPG
Views:	382
Size:	89.1 KB
ID:	11615   Click image for larger version

Name:	cut face 8 pieces equaling 1 inch wide.JPG
Views:	381
Size:	70.8 KB
ID:	11616   Click image for larger version

Name:	eight two inch wide pieces minimal burr.JPG
Views:	410
Size:	60.5 KB
ID:	11618   Click image for larger version

Name:	sliding blade guide adjusted for cut.JPG
Views:	438
Size:	72.7 KB
ID:	11643  

__________________
Does anything happen to me? I take what comes... -Marcus Aurelius

Last edited by X-ray; 04-08-2006 at 10:03 PM.
Reply With Quote
  #10  
Old 04-11-2006, 10:24 AM
pagoda pagoda is offline
Junior Member
 
Join Date: Mar 2006
Location: cleveland ohio
Posts: 35
Default

well i am one of the other 996 owners on the group. check out the problem i am having. (see photo) BTW, this saw is a used saw from the dealer, so i am working on getting a new one. i will post some photos later tho show how far it is "out"
Attached Thumbnails
Click image for larger version

Name:	out.jpg
Views:	630
Size:	63.6 KB
ID:	11708  
__________________
maxstar 150 stl
kama ev996
diacro#2 bender
diacro#3 bender
RMD100 bender
HABERLE cold saw
millermatic passport
TA185
full wood shop...

Last edited by pagoda; 04-11-2006 at 10:32 AM.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Web Search:

All times are GMT -5. The time now is 04:59 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.