nema 14 vs nema 17 at same current
How big difference is there in torque on a nema 14 compared with a nema 17 stepper if they are driven with the same current (for example 1A)?
View ArticleRe: A3995 stepper driver for RAMPS
Hmm, doesn't look like it. The specs at [www.allegromicro.com] say it is a DC motor driver, not a stepper motor driver.
View ArticleDrivers for 17HS4417 (1.5R, 1.7A)
Hi all! I've recently purchased a few 17HS4417 motors, rated 1.7A, with coil resistance 1.5R. Clearly the coil resistance is fairly low - I'm wondering if drivers like DRV8825 would cope with that?...
View ArticleRe: Stepper Motor Connector?
Thanks for the info. I didn't even think of searching the data sheet. That connector that you linked looks about right. What I ended up doing is buy some little 6 pin headers with the pitch that I...
View ArticleRe: Drivers for 17HS4417 (1.5R, 1.7A)
It's no problem to drive a stepper motor with less than the specified current. You get less, but usually sufficient tourque, of course. Any driver will work, higher current drivers will allow for more...
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modifying the cheap stepper motor Howard Ind. 1-19-4200 from unipolar motor...
From time to time NEMA17 stepper motors from Howard Ind. are sold very cheap at places like ebay or pollin.de for as low as 1 or 2€. A few months ago I got a bunch of Howard 1-19-4200 motors at...
View ArticleRe: Drivers for 17HS4417 (1.5R, 1.7A)
Thanks for your answer. I understand the current / torque relation, as well as PWM basics. What concerned me here (after second reading of the datasheet) is that both PWM frequency and blanking time...
View ArticleRe: nema 14 vs nema 17 at same current
There is another variable there. It depends on the number of windings too. Many steppers have multiple versions of the same model with different current and the same torque. Now all other things being...
View ArticleRe: Melzi Drive Capacity
They are limited to 2 amps per phase so that should be fine. The limit is per phase so you don't have to worry about both on at the same time. At 1.5 amps you will likely need a heat sink and fan on...
View ArticleHelp Inconsistent Steppers
Hi Folks: I'm at my witts end. I'm working on a Sumpod Aluminum. I have a proper Marlin firmware modified for the machine (provided by our friends that have the same working machine). Here's what I...
View ArticleMotor Friction torque
Hello i demand a total amount of friction torque. (Tf=To+Tb+Tj, To=friction torque of bracing shaft, Tb=friction torque of free shaft, Tj=friction torque of motor shaft, according to the ball screw...
View ArticleRe: Threaded Rod NEMA 17
Some users are looking for a Nema17 with 5mm threaded rod 300mm long. Is it neccessary? RobotDigg will bring it to standard offer.
View ArticleRe: Threaded Rod NEMA 17
Probably for Prusa I3 which use 5mm threaded rods as Z drive. Afaik.
View ArticleFiner step angle
Hello, I was looking for a NEMA17 stepper motor for the second extruder I am making. I stumbled on to this web site, which sells a few variety of stepper motors. The price looks decent, too. However,...
View ArticleRe: Finer step angle
1. In particular, you have to increase the steps/mm value to the double ... which also limits top speed to the half.
View ArticleRe: Finer step angle
Traumflug Wrote: ------------------------------------------------------- > 1. > > In particular, you have to increase the steps/mm > value to the double ... which also limits top >...
View ArticleRe: Finer step angle
At very small steps (or high microstepping), speed isn't limited by the stepper, but by the processing speed of the controller. The more steps you have to generate, the earlier to hit this limit.
View ArticleRe: Finer step angle
But to be realistic, you will not hit the microcontroller speed limit with 0.9 steppers and 16x microstepping. I am using 0.9 degree motors, and I am very happy with them. More accurate printing.
View ArticleRe: Finer step angle
jkoljo Wrote: ------------------------------------------------------- > But to be realistic, you will not hit the > microcontroller speed limit with 0.9 steppers and > 16x microstepping. >...
View ArticleRe: Finer step angle
You only have to change the steps/mm value, and you will have to do that anyway when you set up a new printer. In Marlin you make the change in configuration.h file, you will find the correct place...
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