Welcome, Guest. Please login or register.
Did you miss your activation email?
October 30, 2014, 06:50:17 PM

Login with username, password and session length
Search:     Advanced search
* Home Help Search Calendar Links Login Register
+  Machsupport Forum
|-+  General CNC Chat
| |-+  Show"N"Tell ( Your Machines)
| | |-+  Yet another Retrofit. Hardinge HXL-S
Pages: « 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 »   Go Down
Print
Author Topic: Yet another Retrofit. Hardinge HXL-S  (Read 42872 times)
0 Members and 1 Guest are viewing this topic.
Hood
Guest
« Reply #10 on: September 07, 2006, 05:06:12 PM »

Sounds like you will have a fair bit of work ahead of you. My lathe uses Hydraulics for all of that but I think the actual mechanism of the two toolposts may be racks of some sort. Hope to get a better idea this weekend.
Hood
Logged
fdos
Active Member

Offline Offline

Posts: 326


View Profile
« Reply #11 on: September 07, 2006, 05:13:06 PM »

Well the Hardinge had options of vertical partoff slide and Parts catcher.   Both not fitted to this machine, but I will add a parts catcher.

The partoff slide was hydraulic but driven by an air motor powered pump.

I'd expect your machine has hydraulic chuck, and maybe turret locking.   Usually the racks are air driven.   You will soon tell if you find any 5 port valves on the machine.   Just hope they don't all leak like mine did!   They are expensive....

Wayne...
Logged
Hood
Guest
« Reply #12 on: September 07, 2006, 05:15:10 PM »

Wayne
No air at all to this machine, just hydraulics.
Hood
Logged
fdos
Active Member

Offline Offline

Posts: 326


View Profile
« Reply #13 on: September 09, 2006, 05:54:24 PM »

Well you know what I said about the cutting oil preserving the machine Wink   Well thats true regarding the iron, but not so good for the cables!

The pic below is the turret encoder, as you can see the once flexible cable (BICC Brand Rex so not cheap stuff) can now defy gravity HEHE....

Needless st say I can't leave it like that, so all the affected cables will be replaced, as I can't afford them cracking up later when the machine is back together.

Also for those interested I found an old vid I did of the turret and tailstock working. This was the day I spent working out the logic of the turret sequencing.   You can also hear the air leaking from all the 5 port valves.  and the compressor comes on part way though for a top up!.

Link is here http://homepage.ntlworld.com/fdosdesign/temp/hxl_turret2.mpg

The turret should NOT do the little clockwise rotation on the way back down, thats now fixed.  The Air cushion that the turret indexes against needed adjusting.

Wayne....


* turret_enc1.jpg (87.79 KB, 411x536 - viewed 1124 times.)
« Last Edit: September 14, 2006, 06:14:09 AM by fdos » Logged
Hood
Guest
« Reply #14 on: September 09, 2006, 06:00:46 PM »

Wayne
 got any more of these encoders, I think you could make a fortune by selling them as modern art Wink
 Indexing looks good, I got a bit of a fright when the tailstock shot out, for a second I thought I was going to hear a crash  Smiley

Hood
Logged
fdos
Active Member

Offline Offline

Posts: 326


View Profile
« Reply #15 on: September 09, 2006, 06:09:15 PM »

LOL....  Well I'm just glad the encoder works.  They cost a fortune from hardinge. I tested it last night, and one of 4 hall sensors outputs goes low for each station.

Today I very carefully used a die grinder and carbide burr to dig out the epoxy potting from around the cable entry, the old cable is now gone and I have enough of the tails to solder a new one to.   Then I can repot that section.

Wayne...
Logged
fdos
Active Member

Offline Offline

Posts: 326


View Profile
« Reply #16 on: September 13, 2006, 04:38:25 PM »

Got the CNC Teknix TEK10 drive quickly setup a little while ago.

Test Power supply @ 45V not quite enough to give me full speed or full current probably.

Setup with divide by 8 to give me reasonable speed with this high count encoder (2500count or 10,000 per turn of ballscrew).

Tuning no where near where it needs to be, but effective.  I'll need to make a lead to connect to the scope.

But so far so good!

Quick video you can downloaded from here. http://homepage.ntlworld.com/fdosdesign/temp/tek10_test.wmv

* tek10_test.wmv (1151.55 KB - downloaded 276 times.)
« Last Edit: September 16, 2006, 05:50:23 PM by fdos » Logged
Hood
Guest
« Reply #17 on: September 13, 2006, 05:37:51 PM »

Looking good Wayne Smiley

Logged
fdos
Active Member

Offline Offline

Posts: 326


View Profile
« Reply #18 on: September 13, 2006, 06:33:55 PM »

It's a good start.

Got to order a big 45v transformer to give me close to the 65v the motors are rated to, then we can really see what happens!

Tuning the drives will improve things too, I was never able to run the old motors with these encoders at anything above 25v on Gecko 340's.   But the old motors were pretty weird and shagged out..   I've just been tweaking the PID terms and got it to be quite snappy, but think the current on the psu is not anywhere near enough. 35v 150VA.  which is 4.28A only 280mA above the continous rating of these motors!  I have a 1kvA transformer in the stores somewhere, I may try that tomorrow.

Wayne...
Logged
fdos
Active Member

Offline Offline

Posts: 326


View Profile
« Reply #19 on: September 16, 2006, 01:41:31 PM »

Got the billet for the Z Axis motor mounting plate yesterday so spent part of today machining the replacement with a larger offset to get the pulleys alligned correctly.

You can see I have stuck with the original design mainly, except the recess for the motor is now round to suit the new motors.   I shall also be getting a sheetmetal working friend to make me up some splash guards to protect the motors from the flood of cutting oil in the machine.  These will bolt to these plates.

Hopefully tomorrow I can try the Z axis with the Teknix drive, and see how well it performs with room to accelerate over that longer distance;)



* z_plate_billet.jpg (43.69 KB, 622x291 - viewed 1123 times.)

* z_plate_1.jpg (45.75 KB, 590x266 - viewed 1136 times.)

* z_plate_2.jpg (48.46 KB, 624x282 - viewed 1125 times.)
« Last Edit: September 16, 2006, 02:29:32 PM by fdos » Logged
Pages: « 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 »   Go Up
Print
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!