Re: Ok I think I made a mistake buying these
Unless you are going to run > 16 volts on the Ramps, even the "12V" motor will have issues. The 36 volt motors will not be happy at the max voltages the Ramps board (and the steppers) can handle.
View ArticleExtruder Stepper Not Working
Hey All, I recently replaced my extruder head and it required a change in the extruder motor direction. So I swapped the wires for the stepper motor to change the polarity of a coil and now the...
View ArticleRe: New Project
Each time the voltage is applied to the coil, the voltage starts to builds the flux, and current is proportional to said flux. And what is significance of ohms law, it sets the current final value for...
View ArticleRe: Stepper selection - voltage confusion.
The label current value is not a "requirement". Its rather a maximum current, e.g. from the coil wire diameter and perhaps something from the motor's magnetics. So the actual driver setting has to be...
View ArticleRe: New Project
Generally speaking there are 2 types of steppers, and there is some correlation between some of the characteristics on the labels. For example for higher voltage motors, like 12v or higher, its very...
View ArticleRe: New Project
The point is that there is already current flowing in the coil in a normal micro stepping setup. You very much do *not* start and stop the current with each step. The motor is moving at a constant...
View ArticleRe: Stepper selection - voltage confusion.
If you are after a specific amount of torque and the motor says it supplies that amount of torque, it does it at the rated current. If you put in less current, you get less torque. If you buy a motor...
View ArticleRe: Extruder Stepper Not Working
I would work out the heated bed issue first. It's probably either shorted to ground or you have blown the FET that controls it. If the extruder motor runs fine on the X axis driver then it's not the...
View ArticleRe: Stepper selection - voltage confusion.
My $.02. A friend of mine bought his printer as a kit. The extruder gear was a printed ABS part and his motor was, IMO, undersized, I don't recal the exact rating. It would get so hot after about 20...
View ArticleRe: Stepper selection - voltage confusion.
There are two very different issues with heat: 1) The heat in the driver as it tries to put the right voltage / current on the motor 2) The heat in the motor it's self. A given torque motor normally...
View ArticleRe: Stepper selection - voltage confusion.
Quoteundersized What's undersized isn't defined by the printer type, but by the accelerations and speeds you want to achieve. In the case you described I'd first reduce motor current to find out how...
View ArticlePrintrBoard expansion pins, stepper driver?
I recently bought a PrintrBoard RevE which arrived with two burnt out stepper drivers (or at least one, the extruder does not seem to be working either, but not certain if that has to do with the temp...
View ArticleDrivers / Stepper motors compatibilty
hey guys, I'm looking into sourcing my parts from china so I came into this I plan to buy this ramps/mega/drivers combo and this stepper motors My question is if the drivers will be compatible with...
View ArticleRe: Drivers / Stepper motors compatibilty
That's a pretty similar setup to the one I'm running ( in terms of drivers and motors ) they're not a perfect match but they're probably close enough. The A4988 can do 1A without a heatsink, up to 2A...
View ArticleRe: Drivers / Stepper motors compatibilty
The chips are rated for 2A if they are on a perfect heat sink and a very heavy multi layer pc board. Some of the chip's heat goes into the heat sink. Most of it *should* go into the pc board through...
View ArticleRapman 3.1 MCP Ltd motors datasheets
I am changing a RapMan 3.1 electronics for a Gen7 with DRV8825 Pololu stepper drivers. But I couldn't find the datasheets for the motors, which are Motion Control Products Ltd motors, in their website...
View ArticleRe: Rapman 3.1 MCP Ltd motors datasheets
I never did find the datasheet for those motors, even when current. Closest I found was M57STH51-3006D which made me wonder if 3008 was a typo. On mine the number is printed by dot matrix, not very...
View ArticleRe: Rapman 3.1 MCP Ltd motors datasheets
Not a typo with my motors, really 3008… the 4th digit means the number of wires, should be 8 but only 4 with this motor… I opened it, no wires cutted or coils shunted… an old nomenclature? I think as...
View ArticleRe: Rapman 3.1 MCP Ltd motors datasheets
You never know when they may have done a "special" for a large customer. Often these parts get an odd part number that does not make sense on the standard chart. To me that's not a good idea. To them...
View ArticleRe: Rapman 3.1 MCP Ltd motors datasheets
QuoteWithout datasheets I presume I'll adjust Pololus without measuring voltage… That's the better way anyways, because it also takes into account how much torque your printer actually needs. Raise...
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