Re: Rapman 3.1 MCP Ltd motors datasheets
Yes Markus, I've seen that in your Gen7 1.4 web page, easier too than measuring voltage…
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A4988 burned?
The stepstick driver (A4988) is not working (turning motor). Have 5V from logicGND to powerGND, this after jump from breadboard when was working. get a little warm when connect both GND without load....
View ArticleRe: A4988 burned?
This is the for sale section, I suspect that you will not get much help on a troubleshooting question here. There's noting on that board that you can easily repair if it's fried ....
View ArticleStepper Motors Problem
Hi, I just got a Prusa model tested recently. Its running on RAMPS 1.4, Marlin and Pronterface. My problem is such that the X,Y and Z motors are working fine when I used the test code. However, when I...
View ArticleRe: Stepper Motors Problem
And also I can't run on Sprinter firmware. This was shown in the Pronterface interface when I upload the Sprinter code: Connecting... f†øfžøžà fxf€˜€††x`f†f`
View ArticleRe: Stepper Motors Problem
In order to debug your printer: 1) Make sure that all axis (X,Y,Z,E) move freely with the power off. 2) Check each of them over the entire range 3) Make sure that the set screws on all gears are tight...
View ArticleRe: A4988 burned?
so now through the magic of "ghost in the machine" the thread is in the proper area. Both of the ground pins need to be returned to ground for the board to work correctly.
View ArticleSteppers can't lift X carriage up
! have just finished constructing my first Prusa Mendel Iteration 2. All the motors X axis/Y axis/Extruder work fine in both directions. Z motors are OK when lowering the X carriage but struggle to...
View ArticleRe: lower the amperage on steppers?
Im watching those Steppers on ebay for a while, but where did you get the the current of 2.4A a coil?
View ArticleRe: lower the amperage on steppers?
The steppers are labeled with a voltage and a resistance. Ohms law will give you the current. In this case I = E/R ( 1.68V / 0.7ohms = 2.4A). Those are small body steppers. One would *guess* that that...
View ArticleRe: Steppers can't lift X carriage up
Simple set of tests: 1) With current applied, you should be unable to turn the motor shafts with your fingers. 2) With no current applied, you should be easily able to turn the whole Z drive setup...
View ArticleRe: Stepper Motors won't turn
Looks like you have your wiring wrong " 2B blue 2A red 1A green 1B black " Its suppose to be : red blue green black So you would have had the opposite polarity for one of your phases, which would...
View ArticleRe: lower the amperage on steppers?
Actually you're right, but the calculation seems not to match in each case. I hope you ain't right about the torque, because i bought 3pcs a few minutes ago ;). I have already a problem with low...
View ArticleRe: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
I ran some tests on my stepper motors. The motors are rated for 2.5 amps for a rated max torque of 4.8kg/cm. My drivers are A4988 compatible 2amp max and I'm running them on their max amps with...
View ArticleRe: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
...... or get something that puts out more drive than the little stepper boards. There are a bunch of $15 to $20 driver modules that will work quite well with those motors. Wiring them up is a bit of...
View ArticleRe: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
I think you are assuming that if you would put same waveform of voltage/current, you would of got almost double more torque from the other motor. I dont think thats can be the case, because you would...
View ArticleRe: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
Flux in an electromagnet depends on current, permeability, and number of turns in the coil. More turns with the same current / core and you get more flux. That assumes you don't saturate the core. If...
View ArticleRe: Which stepper to buy: 68oz 0.9degrees or 70oz 1.8degrees
What i am saying on short is, apparently the OP is unhappy with the choice, thinking a 1,7A motor would give him approx double power than the 2.5A motor, which is highly unlikely regardless of what...
View ArticleRe: lower the amperage on steppers?
Okay, I got the mentioned stepper motors and have them tested. The resultwas that my TB6560 shuts down every second due to overload. The torque was so bad that I could turn the shaft (at 2.3 A) with...
View ArticleRe: lower the amperage on steppers?
That's what I keep telling people. Avoid high current stepper if you are running these light weight drivers !!!!
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