Re: Proper Resistance of a Heated Bed
Thanks everyone. @dc42 nailed it; I hadn't taken the step to measure the resistance at the probes only. When I touch the probes together the multimeter reads 1.0ohm steadily and drops briefly to as...
View ArticleRe: 12864 Smart LCD with RAMPS 1.4 Strange behavior. :S
Quotedc42 The Mega's voltage regulator is very likely working but overheating due to the current drain and going into thermal limiting mode. In particular, the back light on the 12864 needs quite a...
View ArticleRe: Proper Resistance of a Heated Bed
QuoteMy PSU puts out 12.55V. With 1.1ohm resistance the bed will draw 11.4A when cold which is just over the 11A polyfuse fuse capacity. With 1ohm resistance the bed will draw 12.55A when cold which...
View ArticleRe: 12864 Smart LCD with RAMPS 1.4 Strange behavior. :S
Measure if Mega actually is getting ~12V to it's Vin, although it is probably cheap ass chinese voltage regulator.
View ArticleRe: 12864 Smart LCD with RAMPS 1.4 Strange behavior. :S
As well as measuring the input voltage to the Mega, put your finger on the voltage regulator. If it is too hot to keep your finger on for a few seconds, then it is very likely being overloaded - in...
View ArticleCan't upload FW to Azteeg X1
Trying to flash firmware for my first time and cannot get it to go. I get an error that says: avrdude: stk500_getsync(): not in sync: resp=0x00 avrdude: stk500_disable(): protocol error, expect=0x14,...
View ArticleOpinions about TeensyLu?
Hi! I am bit off the road from the mega+ramps and would like to try another electronic board, as for example the TeensyLu. Have you had problems with it? I think it is not documentated enought, but...
View ArticleRe: Can't upload FW to Azteeg X1
Assuming this is not a cheap clone, have you contacted the makers ? In the past I think they were pretty responsive. And they will know all the problems that the specificity of their boards will...
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Current measurement?
While I'm waiting for the parts to arrive, I do some read-up on what to do once they get here. Right now I'm trying to wrap my head around current-adjusting. Right, so what the wiki says and what most...
View ArticleRe: Can't upload FW to Azteeg X1
Thanks I'll give that a try. I notice though that the patch lets me select between v1.0 and v1.5, yet the panucatt site shows v2.0 as the last version made which looks exactly like the version I have.
View ArticleRe: Current measurement?
Except it's a chopped AC current so you might get wierd readings. Also if you accidentally break connection while the motors are powered it can fry the driver. Probably easier to check the resistance...
View ArticleRe: Current measurement?
Oh, I never thought about that. Of course that's easier (and safer). And yeah, I could probably ask the seller, but I want to know things by heart rather than having to rely on others =) Sooner or...
View ArticleRe: Current measurement?
Quoteloidor Right, so what the wiki says and what most of the forum posts I find says is that I should use the formula Current=VREF(8*Rs), and that the Rs value for the Polulu is 0.05Ω, but if it's a...
View Articlecontroller electronics
I am new to RepRap and want to build a Prusa Mendel. But I am confused about the controller electronics used in it. Please tell me how many micro controllers are actually used, which parts they...
View ArticleRe: controller electronics
translation: I haven't done any research, give me answers! 1 micro controller. It controls the entire reprap. Steppers, serial port, heaters, thermistors, endstops the works Also has a usb to serial...
View ArticleRe: Can't upload FW to Azteeg X1
I snapped the mini USB port off of mine by accident recently and am now trying to hook in via the J2 sockets on the board with a USB to TTL cable. The board reacts fine and the PC recognizes it as a...
View ArticleRe: Current measurement?
Quotecdru Stepsticks are four times the resistance of genuine Polulus, so .2Ω, not .02Ω. I = VREF / (8 * RS), or rearranged, the VREF you're looking for for the current rating of your steppers is VREF...
View ArticleRe: Azteeg X3 pro and stepper motor questions
just a comment There are many servo drives out on the market that work on step and direction inputs the same as stepper drivers. just a thought
View ArticleRe: Proper Resistance of a Heated Bed
So that 11A is the holding current? What amperage will it trip at? If your polyfuse didn't trip pulling 15A then mine shouldn't at 12-ish, granted polyfuses are all the same. But say I did wire in a...
View ArticleNeed to flash bootloader
I am building my first printer and am down to setting up the firmware. I have an azteeg X1 and as I've found out I need to flash the bootloader before I can flash the firmware. Looking on the bay, it...
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