Maybe i shouls start a new topic, but you were talking about the need of endstops and this problem is related to it so... I have actually such a problem with my delta printer, everytime i home and do an auto bed compensation, everything works perfectly as it should. But when i leave the printer there for some minutes it suddenly loose some steps (like when you power it off) the head lowers for sby lazy_mosquito - Controllers
i have tried them both, i gave up on Radds/UDOO, although i suspect the UDOO board is the culprit. I received the DUET today and the serial communication is day and night difference. The serial communication works as documented, whilst on the UDOO/RADDS combination my serial connection was always very irregular. Sometimes i couldn't connect at all, one hour later it worked perfect, and then the cby lazy_mosquito - Controllers
Not sure if i should put it here, but think it is relevant because it will make the testing off RADDS on Udoo easier. Anybody who knows a combination of software that works with Udooquad and RADDS? i would like to use the new reprap firmware. problem1: the RepetierServer 0.65 doesn't know the reprap firmware. problem2: The alternative for RepetierServer, Octoprint will not install on Udoobuntuby lazy_mosquito - Controllers
i will try it now on my udoo Radds combination. I am still struggling with my serial communications (flaky, difficult to find why)by lazy_mosquito - Controllers
~Thanks for the feedback, i have found the datasheet of the drv8825 myself and indeed they speak nowhere about a voltage of 6,4V. At this moment i will use the rule of the polulu drivers and multiply the Vref by 2 for the maxCurrent. My stepper motors can handle 2,5A, so i expect 1,2V Vref would be OK. I am wondering if the wrong voltage could be an effect of the measuring points i am using: I coby lazy_mosquito - Reprappers
QuoteEndlane Other thing to worry about is why you get 6,4V as it should be connected to 3.3V of 5V rail, mega runs on 5V, so you should only get 0-~5V range. Are you sure about that? On the documentation about the Megatronics 2.0 on the reprap wiki they state you have to connect the board with a 12V line. (one for the board and one line for the heated bed) I get the 6,4 V when the pot-meter isby lazy_mosquito - Reprappers
Quotepushthatbolder you must double the 'Steps' in your firmware. The Power input is the same. although you must manually calibrate them the same you would with your old drivers, I changed the resolution already to 160 steps per mm in the repetier firmware configuration tool on the mechanics tab. Is that what you mean by doubling the steps?by lazy_mosquito - Reprappers
Wrong forum?by lazy_mosquito - Reprappers
Hi, On all the posts i can find everybody is telling you have to multiply your Vref x 2 to get the wanted max current. If i measure my Vref on my Megatronics V2.0 with Stepstick DRV8825 stepper drivers i can adjust the Vref from 0 to 6,4 Volt. This would mean 12,8A for the stepper motors!! Do the Stepstick DRV8825 use another Vref? I have been googling for it but can't find any conclusive answeby lazy_mosquito - Reprappers
Hi, I am building a big delta printer (600mm diameter x 1000mm high build envelop). I am using a Megatronics V2.0 pcb. with DRV8825 stepper drivers with the latest Repetier firmware. Whatever I try, I can't get the extruder head moving at normal speeds. With the manual section of Repetier Host I get it moving at a speed (?) of 1 mm/min. I changed every setting in the configuration file I could fby lazy_mosquito - Reprappers
I agree in the fact that the board lacks complete opensource info. :-( On the other hand it is not fair to state that it is a ramps without the polulu drivers. Ramps has only 5 stepper drivers while Pibot has 6 stepper drivers. Ramps has only 2 thermistors and a heatbed controller, Pibot has 3 thermistors and a heatbedcontroller and 2 fancontrollers The stepperdrivers are indeed separate pcb's,by lazy_mosquito - Controllers
It works with Repetier which is opensource (as far as i know) and is Arduino compliant.by lazy_mosquito - Controllers
I just found the pibot; was wondering if this is a better solution? Pibot; ramps alternative?by lazy_mosquito - Reprappers
Hi, Has anybody any experience with the pibot electronics? I need stronger stepper drivers then the standard ramps (2amp) It looks like they can take 4,5 amps per stepper channel. Problem is that i can't find a lot of info on them whilst they are also in the reprap wiki. A link to their page: pibot motherboard If not appropriate to put a link to them feel free to remove it.by lazy_mosquito - Controllers
Thanks for all the replies @ ekaggrat: Is it possible to connect for instance gecko drivers to the ramps? I was looking at the fineprint of the ramps and it looks like it should be possible to connect other stepperdrives directly to the ramps. But the fineprint is just not readable on the wiki. @ Uncle_bob: Running the electronics at a higher current is an option, but only a last one. If i canby lazy_mosquito - Reprappers
Hi, I am new to this forum and am planning to build a maxi reprap combined with a lasercutter. Because the footprint is a lot bigger then the standard printer (aprox 1m x 1,4m x 0.75m) i will use stronger (heavier) material. Also the dual extruder will be heavier because it will also have the possibillity to extrude with a bigger diameter. (aprox 2mm) and a normal extruder. Because of this requby lazy_mosquito - Reprappers