Re: RAMPS for Due!
This is a difficult one. Clearly, earth bonding of equipment is a useful safety feature (it's a mandatory requirement in safety standards). Unfortunately it also creates problems in other ways, so...
View ArticleRe: RADDS RepRap Arduino-Due Driver Shield (32bit)
RADDS+udoo Quad + 32 Microstepperdriver DRV8825 [attachment 23424 RADDS_udoo_32step_a.jpg] [attachment 23425 RADDS_udoo_32step_1a.jpg] [attachment 23426 RADDS_udoo_32step_2a.jpg]
View ArticleRe: Opensource PIC/ AVR bipolar stepper driver
The problem for me is that, the TI chip has to be initialized by SPI and then we can controll by parallel method, so that can be a difficulty when we try to interface through parallel port, or we need...
View ArticleRe: Opensource PIC/ AVR bipolar stepper driver
For that sort of thing, I'd use a little PIC. They are cheaper than just about any other way to shoot an init string. They are way lower parts count and take up much less board space than any of the...
View ArticleRe: RAMPS for Due!
If you do make a change to that 4.7K resistor - *please* go to a value that's only available in 1% resistors. Using a part that one can get in 20% is just asking for trouble. Yes it's the standard and...
View ArticleRe: RAMPS for Due!
I've been looking at FET switching performance on the current board. I am switching the D8 output with a 50% duty cycle and a 1kHz frequency. My heatbed is 5 aluminium clad resistors, 6.8 ohm in...
View ArticleRe: NEMA 17 Stepper Motors
Those steppers will work fine. You don't have to put FULL current into them to have them be useful. And besides, I don't know what bob's talking about. the Polou's handle 2amps fine. (with heatsinks)...
View ArticleChinese Stepper Drivers Burned Arduino
Dear all I'm in the process of understanding all the electonics behind my Ultimaker, but this one goes beyond my current (still somewhat basic) knowledge. Please help... I was about to install a...
View ArticleRe: MK2 Heat Bed Wiring- stand alone
Well, I don't exactly have anything 'stand alone' operational or even close, just a group of parts. If I go the mega+ramps route, will that run separately from my Cubex board or would that completely...
View ArticleRe: RAMPS for Due!
Changing the resistor on the drive FET to something smaller would most likely improve the switch-on time, though since we've changed the design currently to running direct off the buffers, that seems...
View ArticleRe: RAMPS for Due!
QuoteCefiar Changing the resistor on the drive FET to something smaller would most likely improve the switch-on time, though since we've changed the design currently to running direct off the buffers,...
View ArticleSDramps conversion on SDTF Card Module for arduino+ramps 1.4
[attachment 23506 Arduino-SD-Card-Logging-Shield.jpg] The above is what I have. I made a connector that connects the sd reader to the correspondingly labelled connections on the AUX3/SPI of the ramps...
View ArticleRe: SDramps conversion on SDTF Card Module for arduino+ramps 1.4
I get the feeling it has something to do with the pins D53 and D49 on the board. I didn't connect them to anything as I didn't know where they go. Looking at the pins.h for marlin it looks like pin...
View ArticleRe: SDramps conversion on SDTF Card Module for arduino+ramps 1.4
You need to connect D53 to CS on the SD card then In SPI, SS = Slave Select, in the SD spec CS = Card Select, it's the same signal though.
View ArticleRe: SDramps conversion on SDTF Card Module for arduino+ramps 1.4
It works! (tu):)-D Thank you! :)
View ArticleRe: RAMPS for Due!
As mentioned earlier ... you probably don't want to get the FET's switching a whole lot faster than half a microsecond or so. There will not be any real gain in power dissipation. The ringing issues...
View ArticleRe: Chinese Stepper Drivers Burned Arduino
Sourcing parts from all over the place when you don't know much about them is almost guaranteed to get you in trouble. I'd check the connections on the stepper modules, connections on the motors, and...
View ArticleRe: NEMA 17 Stepper Motors
There are a *lot* of people who have trouble with the normal (not the 4 layer) 4988's past 1.2A. If you are running a pair of 2.8A motors (standard Z axis) on a single 4988 I'd say that's pretty amazing.
View ArticleRe: RAMPS for Due!
Quoteuncle_bob As mentioned earlier ... you probably don't want to get the FET's switching a whole lot faster than half a microsecond or so. There will not be any real gain in power dissipation. The...
View ArticleATX power supply unit (PSU) cuts out when all electronics are connected
Hi everybody, After a lot of readying finally my first question on this forum. I have build my own reprap 3D printer based on the delta-pi with some modifications. A couple of days ago I finished the...
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