New Project
I have a new brainstorm project that I would like to develop that involves stepper motors and possibly some optic tracking device and maybe some solenoids. Is there anyone out there willing to take me...
View ArticleRe: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
Well the two motors you are looking at both have the same torque to within the round off error in the numbers. Neither one will make a standard Ramps driver board happy. I'd vote for "none of the...
View ArticleRe: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
I understood its good to have a motor with more amps than your driver, that way the motor is never loaded to its full power meaning you can't overheat the motor right? The drivers have overheat...
View ArticleRe: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
No offence uncle_bob but are you sure you are right? You do know that when the motor is rated at 2.5Amps its not magically going to suck 2.5Amps out of a 2Amp stepper driver. Or is it? Actually its...
View ArticleRe: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
The current on the motor is the amount required to deliver the rated holding torque. You do *not* want to exceed the rated current on your drivers. You can always reduce the current into your motors...
View ArticleRe: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
So it looks like I'm going to have to find some different motors that are in the range of 0.5 to 1.0 amps. Could you explain how to calculate what volts to run a x volt rated stepper motor? That'd be...
View ArticleRe: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
You *can* try to run a 100A motor that is rated for 0.01V. Your drivers will probably start cutting out at 1.2A so you will have 1% of it's design torque available to do things. If you have a motor...
View ArticleRe: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
just go for the standard [www.aliexpress.com] $74.61USD or $90NZD(approx) including shipping Know to work well on repraps, and no issues getting to New Zealand Re 0.9 vs 1.8 degrees.. If your running...
View ArticleRe: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
So here's another layer to this - why all the low voltage motors? We stopped using 12 or 15V for logic supplies a long time ago. Today even 5V for logic is becoming less common. People like to design...
View ArticleRe: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
Thanks for the feed back! Dust, thats a great find! Thanks! I'm pretty new to all this, I came across your blog as well, very nice. I'm also near christchurch as you mentioned on your blog. Maybe I...
View ArticleRe: Ok I think I made a mistake buying these
Since you did bought them, i suppose you have them, get hold of a multimeter and measure their coil resistance, takes some 2-3 mins, in comparison to spending few hours looking for a datasheet which...
View ArticleRe: Stepper selection - voltage confusion.
Its just ohms law where current = voltage/resistance this is (almost) all. Usually V and A are given, but can deduct directly the resistance and even wattage. A dc motor has this voltage rating on it...
View ArticleRe: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
I cant get that error you see.... I've ordered from them before. but not recently. I don’t have any spectra, Im a firm believer in belts. From what I read on the IRC channel Spectra stretches to...
View ArticleRe: Stepper selection - voltage confusion.
And the reason we do want the current to rise as fast as possible, its because we run them at frequency, and current needs to rise fast at a good preset value before dropping out again. Its about the...
View ArticleRe: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
Both motors in the original post are good. Coil resistance is 1,8 ohms and 1,25 ohms respectively. The voltage rating on the label of the stepper motor is not the voltage the motor is intended to run...
View ArticleRe: New Project
Stepper motors need a driver to run them. Steppers have different control methods or interfaces with logic circuitry, but most used one is with step/dir/en. These are 3 wires between your arduino and...
View ArticleRe: Can i use a servo on the extruder mechanism for a repstrap?
In fact, the first repraps did initially have a servo motor. Last was Extruder controller 2.2 though makerbot had one version of EC3.6 if i remember ok. The EC 2.2 with some hacks or tweaks documented...
View ArticleRe: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
Thanks people! That answers my question. Or at least, I'm satisfied :)
View ArticleRe: New Project
With a modern micro stepping driver, the current in the coils is a constant frequency sine wave when the motor speed is constant. As you change the speed the drive is still a sine wave, it's just the...
View ArticleRe: Stepper selection - voltage confusion.
You only need to have a motor that runs at printer speeds. Getting a very low voltage motor with a very high current requirement is not a good idea. Motors with 0.5 to 1.0 A currents are out there...
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