View Full Version : Homebrew Powerfeed
08-17-2001, 03:22 AM
I had to recover some files on a disk where the admin pw got corrupted, and found a utility that boots to linux from the floppy to access the NTFS partition, plus some scripts to reset the passwords. While you don't need the password functions, it might get the machine booted so you can read the files. See this site for some choices:
I am working on a powerfeed for a Grizzly 1006. I have a 24VDC gearmotor, and a speed control. My current plan for power transmission is to turn some pulleys on the lathe to accept a round leather belt running from the motor to the screw on the table. Adding an idler pulley, with a tensioning handle to engage/disengage. Another option may be the addition of a 24VDC electric clutch. I figure that this will give me the ability to disengage, and still use the handwheel on the other end of the table, without having to turn the motor. Any other ideas/SNAFUS that I should be thinking about? Thanks!
The mag clutch trick works very well. I used it on the power crossfeed for my SB9 that I built last year.
04-14-2004, 04:28 PM
I have a right angle gear motor on my mill/drill. I used one of those shaft couplings that has the rubber spider in the center. I slid the metal part over the key in the motor shaft when I want to engage it. No belts, no slip. It works fine.
04-15-2004, 12:58 AM
If you do it go all the way and wire it up with a rapid traverse button.
Also I remember seeing some 24vdc clutches that have a cogbelt pulley attached,I think it was in either Herbach and Rademen or C&H sales,cheap too,like $9.95.
04-15-2004, 01:09 AM
Maybe look at-
[This message has been edited by wierdscience (edited 04-15-2004).]
04-17-2004, 11:39 PM
I got the PWM (motor speed) problem figured out cheap like.
With a joystick and my software I can modulate the PWM to vary the speed on a pin on the output on the parallel port. With dual pairs of transistors (H-bridge) you can go both directions. Simple now since I got the timing right.
I am playing with a few small dc motors as we speak. SImple, less than $200 total. That includes the motors. Most everyone has a old pc or two laying around..
NO positional feedback, no encoders, strictly manual with feedback by eyeball. Later perhaps I can close the loop.
I have that utility but it doesn't always work.
David, I used Knoppix today to rescue data from two different systems. One was XP with NTFS, completely gibbled, would not even boot. Got all the required data and burned it to 4 CDs. Guy happily paid me.
Other system was a Win ME system with major parts of the file system gone. Saved 1.6 GB of family pictures. Another happy customer.
Knoppix earned me $250 dollars today.
[This message has been edited by Evan (edited 04-18-2004).]
I have to insist to my customers that they take their old PCs with them. I have way more than a few lying about. It's a real disposal problem. BTW, started playing with Knoppix today, very kool. I haven't played with linux for several years. I think Billy has something to worry about. I got it running because a customer brought me his PC, dead, won't boot, says there is no file system (XP, used to be, NTFS). Gonna try Knoppix to try and recover his 300 hours of work on his new songs (artiste), NO BACKUP. Think penguin.
04-18-2004, 06:10 PM
I am still a lil slow on the linux, I like Knoppix..
A complete OS on cdrom. Lemme know how that turns out.
I was locked out of my Redhat 9.0 by "CHARTER administrator" (ISP) on the start up, it said welcome to charter, then when I tried to enter my password and username it said access privilidges denied. Calls to Charter help got me quite ticked, they don't support Linux. HA, they just crash it..
I tried to recover by knoppix all my photos and files, it said all permissions were denied. Changes to permission for files were not accepted.
I got Ticked off and formatted it all away, loading ZERO-data-load that ran for 4 hours on my 1.6 machine. @Wiped clean and new OS.. 9.2 Mandrake... Now I have 9.1, 9.2 mandrake and windows 98.. XP pro on the way thou..
All my USB toys so far just work in Windows, not linux.. No drivers yet for joystick.. No timers other than RTLINUX calls..
In VB6 Motors run fine, I limit total current via a wirewound resistor, then PWM speed control by joystick/gettime() input frequency...
04-20-2004, 10:24 PM
<font face="Verdana, Arial" size="2">Originally posted by Evan:
Don't you just love tool money? http://bbs.homeshopmachinist.net//biggrin.gif
Knoppix earned me $250 dollars today.
[This message has been edited by Evan (edited 04-18-2004).]</font>
[This message has been edited by wierdscience (edited 04-20-2004).]
04-22-2004, 06:33 AM
I like "PIE" ... Cherry pie, apple pie, peach pie, fried pies, baked pies, hair pie.....
I try to make money with the things I am good at.. I don't claim to know everything thou.