Show all posts by user
Printing issues ...
Page 1 of 1 Pages: 1
Results 1 — 15 of 15
Mine are:
Start:
G28 ; home all axes
End:
M104 S0 ; turn off temperature
M140 S0; off bed
G1 E-2 F300 ; retract
G28 X0 ; home X axis
M84 ; disable motors
by
vitorbrazil
-
General
Quoteetfrench
How did you determine the amperage your board was producing?
If you are talking about the current that your driver's are sending the steppers, I use a4988 drivers, so the basic formula is Current=Vref/0.8
by
vitorbrazil
-
General
Quotevitorbrazil
Quoteorbitalair
Yes I would consider that too hot.
50C is pretty warm, but wont burn you, iirc many motors are rated to 80C, depends on the manufacturer.
Do you have a heated bed? set it to 40 or 50C and compare. Subjective of course, but close.
I use my heatbed at 70C, I guess my stepper was at 100C or something, I reduced it's current from 1.53 to 1.33, so that should yiel
by
vitorbrazil
-
General
Quoteorbitalair
Yes I would consider that too hot.
50C is pretty warm, but wont burn you, iirc many motors are rated to 80C, depends on the manufacturer.
Do you have a heated bed? set it to 40 or 50C and compare. Subjective of course, but close.
I use my heatbed at 70C, I guess my stepper was at 100C or something, I reduced it's current from 1.53 to 1.33, so that should yield about 20% less
by
vitorbrazil
-
General
Quoteorbitalair
Anywhere from 0.5 to 2 amps. Since it was running at 1.5 its likely a higher rated one.
Current rating is related to price, cheaper is usually less current capable.
You could email them, or look up the number of the motor.
I am sure Prusa will tell you if they know(they should).
The idea is to tune them to the lowest current that does not cause skipped steps (to run cooler), but
by
vitorbrazil
-
General
Hi, I was just wondering how much current people with Nema17 and a prusa i3 or similar model are using, I was running mine at 1.53amps but I lowered to 1.33amps and it is still working fine. I would like to know how low you have yours.
by
vitorbrazil
-
General
Here's what happens, pronterface homes all axis, everything moves fine, z axis homes and goes up a bit, extruder heats up, and when it reaches the temperature to start printing, z axis tries to go down a bit but it makes a noise but doesn't move, like it is stuck. I'm not sure how to fix this, since I can move z manually with no problems. Can somebody help?
EDIT: I have determined that the z axi
by
vitorbrazil
-
Printing
Hi, I'm building a 3d printer, I finished everything, tested the steppers, turned the heatbed and extruder on, both heated nicely. So after regulating the bed, I opened pronterface and started printing. Everything was going fine, extruder and bed were still heating up, when suddenly smoke starts coming out of ramps. I shut everything down, and I can see that the heatbed mosfet is fried, it even m
by
vitorbrazil
-
General
After doing this, can I connect usb while having the power supply on a 5v pin?
by
vitorbrazil
-
RAMPS Electronics
I'm building a reprap, and I'm not sure what would be a good current for my a4988 with heatsink and inside a led strip psu case with a fan. My steppers are rated for 1.7A, but I'm only giving them ~1.35A for safety. So I'm just wondering how much current are you putting through your drivers and what's your cooling setup.
by
vitorbrazil
-
General
What would happen if I just connected the 5v supply to ramps without removing D1?
by
vitorbrazil
-
RAMPS Electronics
By the way, vcc is any 5V, right? Can I connect like in the image (vcc and gnd or 5v and gnd)?
by
vitorbrazil
-
RAMPS Electronics
That's perfect, exactly what I need , last question, if I do this, can I connect the arduino usb to my pc while it is being powered from the 5v pin?
by
vitorbrazil
-
RAMPS Electronics
Pardon my ignorance, so if I cut the D1 pin, and apply the 5v supply(5v and ground) to any vcc pin and gnd on the ramps, it will supply the entire 5v rail on the ramps board and also provide 5v for the arduino without going through the voltage regulator?
by
vitorbrazil
-
RAMPS Electronics
I've been reading that the 5v outputs on the ramps board is powered from the arduino, and if I use a 12864 LCD it will probably damage the voltage regulator on the mega.
So if I have an external 5v power supply(atx psu), how do I replace the 5V that comes from the arduino with the 5V that comes from the psu?
PS: I still want ramps supplying the ArduĂno with 12v, I just don't want ramps to get
by
vitorbrazil
-
RAMPS Electronics