Re: RE : RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-21 by uhmgawa
... Mosfets will work just fine. You ll need to assure sufficient drive voltage in the case of an H-bridge for the upper N channel mosfets. This means
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Source for 5804
2005-06-21 by mycroft2152
I just ordered 5804 s from: http://www.nelnick.com/nelniech.html for $4.79 each. They also have some small steppers for $6.99 Its a good company. They are set
Re: RE : RE : RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-21 by derekhawkins
... Then buy them new for $6.50. http://www.alltronics.com/stepper_motors.htm 93I002 $6.50 each ... haven t ... [mailto:Homebrew_PCBs@yahoogroups.com] De
Re: RE : RE : RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-21 by derekhawkins
... Then buy them new for $6.50. http://www.alltronics.com/stepper_motors.htm 93I002 $6.50 each ... haven t ... [mailto:Homebrew_PCBs@yahoogroups.com] De
Re: RE : RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-21 by David P Harris
Allegro says they have replaced it with the 3967 and 3977. Have a look here: http://www.allegromicro.com/sf/3967/ They might even send you a sample. David
Re: RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-21 by Stefan Trethan
... Hmm, interesting theory, i would still think there is some relation to drive speed. For example, if you look at a relay, most wouldn t argue that a 400x is
Re: RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-21 by Phil
... frequency is ... It was a rhetorical question, of course they are faster. It s completely up to the designer what he wants to do but I d be careful and
RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-21 by Robert Hedan
Nevermind, it s not quite the same thing. It seems as if they broke down the UCN5804 into various chips. The L6506/D is a linear integrated circuit designed
[Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-21 by Robert Hedan
RE : RE : RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-21 by Robert Hedan
I m blind, can t see the pulls. :D But I did see another model: L6506D. What do you think of that chip? Maybe it s more readily available, haven t checked
Re: RE : RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-21 by derekhawkins
Look at the bottom of that page; UCN5804B pulls Famous stepper motor driver integrated circuit (spec sheet available see our 93I002) these chips have been
RE : RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-21 by Robert Hedan
Make that $6.50 each... Robert ... This site has pulled UCN5804s for $3.50 each; http://www.alltronics.com/linear_ic_list.htm Be sure to visit the group home
Re: RE : RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-21 by derekhawkins
Check here; http://www.alltronics.com/linear_ic_list.htm
Re: RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-21 by derekhawkins
This site has pulled UCN5804s for $3.50 each; http://www.alltronics.com/linear_ic_list.htm ... and ... simple
RE : RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-21 by Robert Hedan
Jameco, DigiKey and Mouser, my favorite suppliers, have none. Gonna check the surplus places now. Robert ... A blast from the past....Is the obsolete Allegro
Re: RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-21 by derekhawkins
... A blast from the past....Is the obsolete Allegro UCN5804 unipolar driver that difficult to get these days? I found 3 in my parts box and 4 installed in
Re: Hello. Any Australians about? (specificaly toner tranf
2005-06-21 by electrophilip
The motor is ac, there is probably a chance you could change the gear on the motor but not mount the motor back in it s original location to allow for larger
Re: [Homebrew_PCBs] Re: bigger boards on Eagle Light
2005-06-21 by Stefan Trethan
On Tue, 21 Jun 2005 02:09:55 +0200, Ted Huntington ... There is a freePCB yahoogroup. I have tried it, and found it too severely lacking
Re: RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-21 by Stefan Trethan
... because they are faster. all switchmode/pwm circuits use faster diodes. In the simple controller suggested there is no chopping, the frequency is low, a
Re: RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-21 by Stefan Trethan
... That would be the first time i hear that. I was much rather believing the 1n400x is a slow rectifier diode. Using the bias of a diode to switch rf does not
RE : RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-21 by Robert Hedan
maybe this has been discussed but why not use mosfets instead of the NPNs? If you can turn them fully on they will run a lot cooler with little voltage drop.
Re: RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-21 by Phil
why do most hbridges and stepper controllers use schottkys? ... structure used ... the bias. ... beat you
Re: [Homebrew_PCBs] Re: bigger boards on Eagle Light
2005-06-21 by Leon Heller
... From: Ted Huntington To: Sent: Monday, June 20, 2005 11:28 PM Subject: Re: [Homebrew_PCBs] Re: bigger
Re: [Homebrew_PCBs] Re: Hello. Any Australians about? (specificaly toner tranf
2005-06-21 by Bill Maxwell
Thanks Phillip, I have accessed those ok so please ignore my earlier request for direct email. I guess if changing the gearing is looking too difficult, I
Re: [Homebrew_PCBs] Re: Hello. Any Australians about? (specificaly toner tranfer stuff)
2005-06-21 by Bill Maxwell
Thanks Phillip, sounds promising on the whole. I dont know how to upload photos either but if you could email them direct to me I would appreciate it very
Re: [Homebrew_PCBs] Re: bigger boards on Eagle Light
2005-06-21 by Ted Huntington
That looks good, because it is GPL and works in Windows. Maybe I will try that when I get some time. Anybody else please report your findings on either
Re: RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-20 by KD5NWA
Those puppies are faster than grease lightning, they use the structure used by pin diodes. I use the 1N4007 to switch rf signals by controlling the bias. ...
Re: [Homebrew_PCBs] Re: New Wave Concepts - PCB Wizard & LiveWire
2005-06-20 by Stefan Trethan
On Mon, 20 Jun 2005 23:46:58 +0200, lcdpublishing ... *lol* Me too. ST
Re: bigger boards on Eagle Light
2005-06-20 by Phil
Haven t tried it. Have you looked at www.freepcb.com? ... for ... com, Stefan Trethan
Re: RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-20 by Phil
maybe this has been discussed but why not use mosfets instead of the NPNs? If you can turn them fully on they will run a lot cooler with little voltage drop.
Re: [Homebrew_PCBs] Re: bigger boards on Eagle Light
2005-06-20 by Ted Huntington
Has anybody ever tried PCB for Linux? I wish there was a good open source PCB program. Since I had to draw almost all of my components in Eagle, I was
Re: bigger boards on Eagle Light
2005-06-20 by Phil
That does seem like a huge amount of work to avoid paying for something. Much better to modularize your design and do multiple boards if you don t want to pay
Re: New Wave Concepts - PCB Wizard & LiveWire
2005-06-20 by lcdpublishing
I sure do Stefan! Thanks to you for all you coaching and hand- holding. About the software though, while it is rather basic, I trust it more than my..... Are
Re: [Homebrew_PCBs] Re: New Wave Concepts - PCB Wizard & LiveWire
2005-06-20 by Stefan Trethan
On Mon, 20 Jun 2005 23:30:49 +0200, lcdpublishing ... You know, i had a gut feeling you might have that software ;-) You surely realize you know much more
Re: New Wave Concepts - PCB Wizard & LiveWire
2005-06-20 by lcdpublishing
FINALLY! Somthing I can talk about that I actually know about! (this is somewhat a joke between me and Stefan - he knows my abilities). Livewire is cute and
RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-20 by Robert Hedan
TIP31, I ve included a parts list on the schematic in the CNC folder of the Files Section. Transformer 24V 1.5A 4070 XOR 4027 Flip-flop MCT6 opto-coupler 1K
RE : [Homebrew_PCBs] PIC stepper controller for drilling station
2005-06-20 by Robert Hedan
I m not getting PICs for this model. I m going the short and simple route for the drilling station: - Mach 2 on the PC. - Parallel cable to a triple driver
Re: Forget the clothes iron - get a laminator
2005-06-20 by Radra
Refer to an earlier post, 7726, regarding measured laminator temperature. Lyman
Re: [Homebrew_PCBs] New Wave Concepts - PCB Wizard & LiveWire
2005-06-20 by Stefan Trethan
On Sun, 19 Jun 2005 22:56:03 +0200, Ryan C. Payne ... I would think a solderless breadboard and a few components are better use ... If
Re: [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-20 by Roy J. Tellason
... What are you using for driver transistors there?
Re: [Homebrew_PCBs] PIC stepper controller for drilling station
2005-06-20 by Stefan Trethan
... I agree. My opinion is it is insane to use a micro for such a simple function. Now microstepping is another issue, although there would still be relatively
Re: [Homebrew_PCBs] PIC stepper controller for drilling station
2005-06-20 by Alan King
... http://www.glitchbuster.com/ Or get some samples from Microchip. Not so sure why you all are bent on getting PICs for this. If all you re doing is Step
Re: RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-20 by Stefan Trethan
On Mon, 20 Jun 2005 14:59:04 +0200, Robert Hedan ... 24V motors? they are going to have a lot of inductance and resistance. Probably OK for simple drivers, but
RE : [Homebrew_PCBs] Re: Hello. Any Australians about? (specificaly toner tranfer stuff)
2005-06-20 by Robert Hedan
Create a folder for you in the Files section of the Group and use the Add File feature. Robert ... De : Homebrew_PCBs@yahoogroups.com
RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-20 by Robert Hedan
I ve done what I believe are improvements to the 12V stepper motor driver schematic I had in the Photo section. It s no longer there, I moved it to the CNC
Re: Hello. Any Australians about? (specificaly toner tranfer stuff)
2005-06-20 by electrophilip
Bill, I have taken apart the laminator, it wouldn t be easy to change the gears around for a different speed as the two rollers have the same size gears (to
Re: [Homebrew_PCBs] Forget the clothes iron - get a laminator
2005-06-20 by Stefan Trethan
On Mon, 20 Jun 2005 10:05:08 +0200, Philip Pemberton ... By the way, 160C is just below the point where copier paper will start to brown, so you could use that
Re: [Homebrew_PCBs] Forget the clothes iron - get a laminator
2005-06-20 by Stefan Trethan
On Mon, 20 Jun 2005 10:05:08 +0200, Philip Pemberton ... I had expected it to be rather difficult to clean a board with water only and paper, but it seems it
Re: [Homebrew_PCBs] Forget the clothes iron - get a laminator
2005-06-20 by Philip Pemberton
In message ... The best thing I ve used is 600-grit 3M WetOrDry silicon-carbide paper. Put the board in a bowl full of
Re: [Homebrew_PCBs] bigger boards on Eagle Light
2005-06-20 by Stefan Trethan
On Mon, 20 Jun 2005 08:53:51 +0200, David McNab ... What you end up with is a bunch of librarys that are all too small, better get the