repetier/ rambo digipots?
the x and y axis are calibrated beautifully but the z axis wont go up much. i started w/ a steps per mm of 400 on z, now im up to 5000 from 3000 something( which worked well, just not tall enough)....
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Inital current settings are in configuration.h #define MOTOR_CURRENT {135,135,135,135,135} // Values 0-255 (RAMBO 135 = ~0.75A, 185 = ~1A) you need to comment it out. The order is x motor, y motor, z...
View ArticleRe: repetier/ rambo digipots?
thanks a lot!! ive measured with a caliper and found that when x was told 10 it went 15.3, i adjusted this with the prusa calc. now im having a generated g code not found error, but thats an easy fix...
View ArticleRe: repetier/ rambo digipots?
z-feedrate 2000 with leadscrews? That is not possible. That means 33mm/s. I think that already gets reduced by firmware settings. Slic3r does this always with full speed and relies on the firmware to...
View ArticleRe: repetier/ rambo digipots?
ok so ive been trying to print and having trouble with what i think is the layer height. im using a .5 nozzle and a layer height of .4 and the prints seem shortened on the z axis. when i step up to a...
View ArticleRe: repetier/ rambo digipots?
Looks like you are loosing some distance for each z-change. Make sure a) you do not disable z-axis if unused b) z-acceleration is low enough c) Your z-lead screws are fixed properly d) current is high...
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its working! i have the current control at 135,135,170,170,135. the problem was the cheap nema 17s i was using. i also had a wire on the 6 pin power connector to the RAMBo Board get real hot and melt...
View ArticleRe: repetier/ rambo digipots?
Be carefull with higher voltages. The power raises quadratic with the voltage, so your heaters get much faster hot. You can limit the max. power (drive max 255) if needed in the config. You are the...
View ArticleRe: repetier/ rambo digipots?
i put the extruder motor current back down to 135 - 135,135,170,135,135; but i still think i need to go lower as it still gets very hot even with a 40mm fan pointed at it. ive red online to turn the...
View ArticleRe: repetier/ rambo digipots?
I have no RAMBO board so I can not say anything about the wiring. In general the higher the current the bigger the cross section should be. There are calulators and tables online to calculate the...
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problem solved !! heavier gauge wire fixed the power connector problem. the z motors seem to step well with current control at 170 too. thanks for the help!!!
View ArticleRe: repetier/ rambo digipots?
now the z axis problem is back!! i got frustrated with the prusa nozzle and took it off. i was printing well for a while with my budaschnozzle. now the z axis m5 threaded leadscrews are only turning...
View ArticleRe: repetier/ rambo digipots?
whoops! forgot to put the nozzle diameter back to .5, sorry about that.
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