Re: Drilling station steppers
2005-06-22 by derekhawkins
... No way, there s money to be made. BTW, one of the ICs is just a chip resistor. ... most ... controllers ... post ... love
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Re: Drilling station steppers
2005-06-22 by derekhawkins
... A new shaft encoder can be had for $19.00 these days. Adding a second shaft to any surplus DC motor is a piece of cake if you have access to and know how
Re: Drilling station steppers
2005-06-22 by lcdpublishing
... Heck, if you can do a 3 IC circuit to drive servo motors, please post it! That would be simple and cost effective and I for one would love to see it (make
Re: [Homebrew_PCBs] Re: Drilling station steppers
2005-06-22 by uhmgawa
... Agreed. I was assuming we are talking about midnight engineering here rather than looking for a $ervo motor off the shelf. I d expect the lab-built
Re: Drilling station steppers
2005-06-22 by derekhawkins
... I wouldn t consider three ICs complicated...Even simpler than most stepper drives. No doubt you re thinking of yesterday s controllers like the ever
Re: [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-22 by uhmgawa
... It depends upon the design. Certainly the intrinsic diode isn t typically as well characterized as a discrete diode (though I ve seen exceptions to this)
RE: [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-22 by Dave Hylands
For what it s worth I m using unipolar (6 wire) steppers (the stock Sherline steppers) on my milling machine, and they re being driven by a Xylotex board,
Re: Unipolar stepper motor driver wiring
2005-06-22 by Phil
... wrote: ... it s okay ... other ... slow, and ... Since heat ... diodes, ... agreed. even if they switched fast, there would be
Re: Drilling station steppers
2005-06-22 by Phil
... wrote: ... as the ... While I m reluctant to recommend servos for cost reasons, I think they can be done at about the same complexity
Re: RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-22 by Phil
that s a decent solution but I hate the L298 s pin arrangement - makes prototyping a PITA. Prototyping with mosfets is pretty easy as long as you get the
Re: Drilling station steppers
2005-06-22 by lcdpublishing
There is no question about it, servo motors are better than steppers, but at a cost. True servos are much more expensive than steppers of equal power. Servo
Re: [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-22 by Roy J. Tellason
... This is the second post I ve seen so far that seems to suggest that it s okay to rely on the internal diodes in mosfets. The general consensus in other
Re: PCBs at home
2005-06-22 by Steve
My local plastics guy says plexiglass is not good for constant contact with water. It will absorb some and swell, causing crazing. Steve Greenfield
Re: RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-22 by Phil
... wrote: ... is ... Agreed. I use them for relays and haven t blown a driver yet (famous last words). I think the reason is because
Re: [Homebrew_PCBs] Re: Drilling station steppers
2005-06-22 by Stefan Trethan
On Wed, 22 Jun 2005 16:30:02 +0200, derekhawkins ... Imagine that, i did photoetching for years and moved to toner transfer, and
Re: [Homebrew_PCBs] PCBs at home
2005-06-22 by Stefan Trethan
On Wed, 22 Jun 2005 07:30:50 +0200, Ray Dinwiddie ... Heating the solution is a pretty bad idea, because you get a huge amount of HCl vapor that is REAL BAD to
Please Trim! msg from Listowner
2005-06-22 by Steve
It seems to be happening a lot more lately, people are forgetting to trim. There is no need for five screens of quoted text with 2 sentences of reply. Please
Re: [Homebrew_PCBs] Re: Drilling station steppers
2005-06-22 by uhmgawa
... Another benefit of closed loop control is the ability to detect/correct positioning errors which isn t possible with an open-loop stepper approach. If the
Re: RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-22 by Steve
Please trim the quoted parts. To be specific, that is true only of the 1N4007. It s my understanding that the other lower voltage 1N400x series are not the
Re: [Homebrew_PCBs] Drilling station steppers
2005-06-22 by uhmgawa
... The discrete driver contained in stepper_driver_mod.JPG can be modified for bipolar drive by creating a totem pole structure of an upper PNP and lower
RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-22 by Robert Hedan
Have to be careful with this though, four coils on instead of two, so you have to make sure your motors are designed to run that way as well. More than a few
Re: RE : [Homebrew_PCBs] Drilling station steppers
2005-06-22 by Mycroft2152
Hi Robert, Did the same thing, ordered the Steppr400 s and 5804 s from Nelnick. Good price for them ($6.99), worth $20 bucks to try them out. Al C ...
RE : [Homebrew_PCBs] Drilling station steppers
2005-06-22 by Robert Hedan
LOL.. If by resistance you mean cogging, that has nothing to do with being demagnetized. Short all the wires on one of your motors together, and see if it
Re: RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-22 by Steve
... Would it be easier to just use the L297/L298 combo? Together they do PWM limited current and half-stepping. They are bipolar internally, but it s all
RE : [Homebrew_PCBs] Drilling station steppers, bipolar driver circuit
2005-06-22 by Robert Hedan
That is bi-directional , as in turning the motor both ways, vs only one way in the circuit above it. Have to keep your bi- s straight, nothing to do with
Re: Drilling station steppers
2005-06-22 by derekhawkins
... Just like those fooling around with toner transfer now will someday move on to photoetching so will those on steppers now move on to DC servos. Seems to be
Re: RE : RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-22 by Alan King
... The main reason for schottky is to make sure it turns on and takes the heat, if it is not schottky then the internal diode may turn on instead and the
Re: Drilling station steppers
2005-06-22 by derekhawkins
... That s exactly what I found in one of my storage boxes in the garage over the weekend. Found three 5V 1A unipolar steppers that were hooked up to a board
Re: [Homebrew_PCBs] Drilling station steppers
2005-06-22 by uhmgawa
... IMHO steppers are a rather brute-force way to address a limited set of applications. If all you need are simple open-loop indexed positioning,
Re: [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-22 by Alan King
... Have to be careful with this though, four coils on instead of two, so you have to make sure your motors are designed to run that way as well. More than a
Re: [Homebrew_PCBs] Drilling station steppers, bipolar driver circuit
2005-06-22 by Alan King
... That is bi-directional , as in turning the motor both ways, vs only one way in the circuit above it. Have to keep your bi- s straight, nothing to do
Re: [Homebrew_PCBs] Drilling station steppers
2005-06-22 by Alan King
... LOL.. If by resistance you mean cogging, that has nothing to do with being demagnetized. Short all the wires on one of your motors together, and see if
Re: RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-22 by uhmgawa
... You are likely thinking of a varicap which has a change in capacitance of about 2x when the DC bias imposed upon it varies over a 0 to ~30V range. Actually
[Homebrew_PCBs] Drilling station steppers, bipolar driver circuit
2005-06-22 by Robert Hedan
Darn, It seems the circuit I had for unipolar steppers can be wired for bipolar steppers as well. I found a copy of it here, but there s just one problem:
[Homebrew_PCBs] Drilling station steppers
2005-06-22 by Robert Hedan
Uh, change in plans. I ve been fiddling around with the 24V motors I have on hand and they appear to be VERY demagnetized. I didn t notice this until I
Re: RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-22 by Stefan Trethan
On Wed, 22 Jun 2005 10:35:35 +0200, Bill Maxwell ... Indeed i had not heard of it, and it is good to know. But fast it isn t, which you
Re: [Homebrew_PCBs] Re: Hello. Any Australians about? (specificaly toner tranf
2005-06-22 by Bill Maxwell
Thanks for that tip. Actually, the Ibico Pouchmaster A4 looks more like a GBC H300, on closer examination of the GBC homepage, although it is obviously sized
Re: RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-22 by Bill Maxwell
That s true Stefan and I now see the point you were making. My response was mistaken in thinking you had not heard of the IN4007 s PIN function. Sorry. Bill
Re: [Homebrew_PCBs] Drilling station interference
2005-06-22 by Stefan Trethan
On Wed, 22 Jun 2005 08:32:17 +0200, Robert Hedan ... If you use the 24V steppers and no chopper driver you probably will have much less problems anyway. I ve
Re: [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-22 by Stefan Trethan
On Wed, 22 Jun 2005 08:06:00 +0200, Robert Hedan ... I wouldn t be too sure bout that. By the way, you can use a unipolar stepper in bipolar mode as 2 phase
Re: [Homebrew_PCBs] Re: Hello. Any Australians about? (specificaly toner tranf
2005-06-22 by Stefan Trethan
On Wed, 22 Jun 2005 02:08:21 +0200, Bill Maxwell ... Those small geared motors are often AC syncronous. You could try a poor man s
Re: RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-22 by Stefan Trethan
On Wed, 22 Jun 2005 01:55:06 +0200, Bill Maxwell ... I am not into radio, but i thought a PIN diode is used to get a variable capacity
[Homebrew_PCBs] Drilling station interference
2005-06-22 by Robert Hedan
I picked this up from the Gecko group. We will have a problem with the power cables to the motors and must take some preventive action. Here s the ... Here s
[Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-22 by Robert Hedan
My surplus source has the UCN5804 in stock. I m waiting for a reply with prices. I know I m going to get a batch of these babies. I know unipolar steppers
PCBs at home
2005-06-22 by Ray Dinwiddie
Hi all a new member, just found your group, thought I would share some on my recent discoveries re; homemade PCBs. Etchant: I use muratic acid (Ace Hardware) 1
[Homebrew_PCBs] Stepper motor controller/driver IC, was Unipolar stepper motor driver wiring
2005-06-22 by Robert Hedan
Thanks David, But the 3967 and 3977 are designed for bipolar steppers. I ve requested a sample of 3967 for testing on another application, but they don t help
Re: [Homebrew_PCBs] Re: Hello. Any Australians about? (specificaly toner tranf
2005-06-22 by Bill Maxwell
Toay s local paper carries a full page advert for Officeworks, advertising the Ibico Pouchmaster 9 A4 Laminator for $149, a $100 discount. If I recall my
Re: RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-21 by Bill Maxwell
Using IN4007 diodes as pin diods is a quite a well known ham radio trick Stefan. Bill ... From: Stefan Trethan To:
Re: Forget the clothes iron - get a laminator
2005-06-21 by newaag
I use a picture dry mount press, followed by an iron. The dry mount press prevents any sliding of the paper on the PC board during the initial heating, but is
Re: RE : RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
2005-06-21 by JanRwl@AOL.COM
In a message dated 6/21/2005 9:10:54 A.M. Central Daylight Time, robert.hedan@videotron.ca writes: Is the obsolete Allegro UCN5804 unipolar driver that