Re: RAMS or Megatronics for stepper control (not for 3d printer)?
I didn't notice that the sound of the motors in your first video was particularly bad. Is noise or vibration a particular problem? Steppers tend to be like that. It's difficult to recommend motors,...
View ArticleRe: [Solved] RUMBA burned
Yes, it was not only cheaper but quicker , I can't imagine myself waiting 2-3 week till the new board arrives home... Once you pointed the D6 diode I realized about its importance in the board: to...
View ArticleRe: Extruder's thermistor spikes/Drops when HeatedBed reaching setpoint (95°C)
The usual issue here, apart from insufficient grounding, is that you're most likely getting a ground loop across the USB cable. You can usually tell if you measure current between the USB ground on...
View ArticleRe: Extruder's thermistor spikes/Drops when HeatedBed reaching setpoint (95°C)
Cefiar, thanks for the info. I can confirm that I have ground loop issues, but do not feel great about reducing electrical safety by rewiring my psu. Do you have a suggestion/ballpark for a reasonable...
View ArticleRe: RAMS or Megatronics for stepper control (not for 3d printer)?
QuoteBut I guess if you are spending $100's on controllers and drivers (probably unnecessary), you don't want to skimp on the motors. The motors may be the most critical part. I don't want to buy the...
View ArticleRe: RAMS or Megatronics for stepper control (not for 3d printer)?
if your motors are just turning, why not look into a geared dc motor, or is there a reason you need a stepper.?
View ArticleRe: How many extruders do you need?
Hey Bobc Exellent work. If I go for a larger expansion board than 4 for the duet then sonething along these lines would be good. I was wondering though about the relectance to use a slave...
View ArticleRe: How many extruders do you need?
In my experience, implementing high-speed low latency comms protocols is not that easy. It's the kind of thing I do at work :) Someone has to write the firmware, test it, support it. Users will also...
View ArticleRe: How many extruders do you need?
But as I can see so far the latency is the main problem for the stepper motors, that have to be exactly precise. I am planning to make a "standalone printbed", where a microcontroller only has to...
View ArticleRe: How many extruders do you need?
Hi bobc Yeah I dont think trying to sync the step pulses across micros is a good idea but pwm for heaters and adc for temp does not need that level of sync. Tony
View ArticleRe: RAMPS for Due!
and I am glad to say that mine doesnt have ambro's issues on the E0 dir and z min pins. :) waiting on another stepstick and my extruder motor so I can say for sure. I am very happy with this. it seems...
View ArticleRe: How many extruders do you need?
Ok, so let's consider just the PWM and ADCs. The two chips I am using are £3.40 total for one off. A Mega644 would cost maybe £4.70, so already it's looking more expensive. You might be able to find a...
View ArticleRe: RAMPS for Due!
That's good to hear and thanks! I've been updating the layout to use the AREF signal for the thermistors, also a few other minor changes. I replaced the 1N4004 with a 10A rated package. I added a...
View ArticleRe: How many extruders do you need?
Quotebobc If the micro had more interesting processing to do it would make more sense, but using firmware to do a low level processing job is an unnecessary complication. One thing a micro could do is...
View ArticleRe: How many extruders do you need?
That's an interesting project! You can get little RF modules which might be useful. The comms protocol could be quite simple, you just need to set and read temperature. I think you could use a small...
View ArticleRe: How many extruders do you need?
Quotebobc That's an interesting project! You can get little RF modules which might be useful. The comms protocol could be quite simple, you just need to set and read temperature. I think you could use...
View ArticleRe: How many extruders do you need?
The modules I am thinking of are these [www.ebay.com]. They connect with an SPI interface. There is already an Arduino library to support them, so it should in theory be quite easy to use. I would not...
View ArticleRe: How many extruders do you need?
Wow, they look cool! And they are really cheap! Do you have any experience how well they work? I was thinking more about using 2 directions of Infrared, but I don't thinkt that it might be cheaper or...
View ArticleRe: RAMPS for Due!
If you think we're there, then lets go for it! I'll spend the next few days looking over things to see if I can see any gotchas.
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