Re: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
The very fundamental problem is that people seem to be looking just at current and not at voltage or resistance (or max torque). Current by its self means absolutely nothing at all. You need the rest...
View ArticleNEMA 17 Stepper Motors
Hi, I am currently building my first rep rap, and decided to go with the Prusa Mendel i3 rework. I'm having difficulties deciding witch stepper to buy. I was looking into buying this one:...
View ArticleRe: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
Quoteuncle_bob The very fundamental problem is that people seem to be looking just at current and not at voltage or resistance (or max torque). Current by its self means absolutely nothing at all. You...
View ArticleRe: NEMA 17 Stepper Motors
Ok, this is what - the third or fourth thread you have started asking exactly the same question? That's not really the right way to do things. It makes for a lot of clutter and it fragments the...
View ArticleRe: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
Here's the disconnects: Even if you could put a several thousand volt driver on the motor and run an amp through it no matter what, it's torque wold still drop off. The hysteresis and loss in the...
View ArticleRe: NEMA 17 Stepper Motors
Sorry uncle bob, since this is my first experience with the forums, I didn't know where to post this topic. So I posted it on the places I thought the right people would read it, like you, and help...
View ArticleRe: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
Quoteuncle_bob Here's the disconnects: Even if you could put a several thousand volt driver on the motor and run an amp through it no matter what, it's torque wold still drop off. The hysteresis and...
View ArticleRe: NEMA 17 Stepper Motors
The only real problem is that now the answers and the information are scattered all over the place. In some cases the replies to the threads use information from other threads. That will make it hard...
View ArticleRe: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
QuoteNoobMan Quoteuncle_bob Here's the disconnects: Even if you could put a several thousand volt driver on the motor and run an amp through it no matter what, it's torque wold still drop off. The...
View Articleold stepper motors stuck
Hello, I am trying to continue to build an old mendel reprap kit which was in a box for two years (shame on me :-) ) The parts: - Gen 3 electronics - 4 steppers motors of type SY42STH47-1684MB I am...
View ArticleNEMA 17 ONLY CLUTTERS
hELLO everybody It is my first post. Recently I bought a Prusa i3 kit from a local supplier. I get no customer service as expected. Here is My problem. I fnished the assembly and barely understand...
View Article6) Grab a DVM and set the drive current to ½ the spec on the X and Y
Hello Can somebody tell me how do we do this accually from where 6) Grab a DVM and set the drive current to ½ the spec on the X and Y Thanks
View ArticleNewbie Build - Ebay Stepper Motor Question
Hello everyone! I am a complete newbie as far as most electronics go and have limited experience with Arduino but I cant help but want to build a 3D printer and/or a CNC machine. I've been tinkering...
View ArticleRe: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
You are quite right about the differences of detent and holding torques. See, it appears to be hard to admit, but its not that hard, and the fact itself has a great deal of benefits, in other words,...
View ArticleRe: Newbie Build - Ebay Stepper Motor Question
5 wire steppers are unipolar only, and hence incompatible with normal RepRap electronics; this type also doesn't have enough torque. 4, 6 or 8 wire steppers are all suitable.
View ArticleScavenged Motor Database
Does anyone know if there is a site or database out there that can point users in the right direction when scavenging parts? For example, I got two printers, and a flatbed scanner for $20 from a...
View ArticleRe: Scavenged Motor Database
The main issue is that there are way to many gizmo variations out there and far to little data (no manuals) on what's in them. Some of these outfits change motors more often than I change socks ....:)-D
View ArticleRe: Newbie Build - Ebay Stepper Motor Question
You need some fairly specific motors for a printer. They run $10 to $20 brand new for ones that work with the controllers we normally use. Matching a "free motor" up to a $30 controller does not save...
View ArticleRe: 6) Grab a DVM and set the drive current to ½ the spec on the X and Y
1) What does your motor spec sheet say about the max current per winding? 2) What is the max torque on your motors (same spec sheet) 3) Which stepper chips do you have? 4) Which stepper PC boards do...
View ArticleRe: old stepper motors stuck
If the motors are powered up, it's normal for the shaft to be "stuck". If the motors are not powered up, you should be able to turn them with your fingers.
View Article