I wonder, why didn't you get a board from Panucatt? I have great experience with their services plus I have a feeling that you are in the same Country.
I hope that you can solve it with a Paypal claim...
http://www.ebay.com/itm/AZSMZ-32bit-con ... 3cf2451c8e
There is a lot of little things to consider when replacing the UP electronics mostly because of the design of the UP machine. There is no thermistor on the heat bed so I decided to use the bed without a thermistor (the way its always been). In the firmware for the board there is a provision for ignoring the heat bed so this is what I did. I wired the heat bed directly to a 12 volt supply on the ATX power supply. Anyone familiar with an ATX power supply from a computer will know that the power supply is turned on and off by shorting two of the wires together. I used the back panel switch to control the AXT power supply on and off. I have it so everything comes on when the back panel switch is closed, including the LED strip I installed. The heat bed uses power straight from the power supply so its on when the machine is on and off when the machine is off. I control the bed itself with a small switch I installed on the bed a long time ago. Installing a bed thermistor is always an option later down the road and it would give me control over the bed temperature.
I am concerned about how I am going to modify the firmware to tell the printer where to set the Z height for printing. The end stop position for the Z axis is opposite of where it is on other machines. Usually the Z end stop is where the extruder nozzle is closest to the heat bed so the extruder nozzle is ready to print upon homing the Z axis. The Z end stop on the Mini is at the opposite end of where the extruder nozzle is.
The touch screen LCD is very easy to use and works great. The menus are simple and easy to understand.
More to come.
The Up extruder is defintely not that great but beleive me it's nowhere near the worst. Curious you should applaud a MK8 which is also quite flawed for most of the same reasons as the Up extruder... just a little less flawed. On the hotend front I have a lot of respect for the Up style hotend which works reasonably well from 150 to 350C and has spewed a lot more filament without fuss than most of my other hotends. That said, I really my give a hexagon a go but not had the time lately.jeeplvr wrote:Finally got the board set up to work with the Mini configuration. The UP Mini is bassakwards from a reprap machine in that the end stops are at the max travel points of each axis. There are provisions in the firmware to account for this but figuring it out was a challenge. The text in the firmware is obviously translated from Chinese to English and hard to follow sometimes. The UP Mini has to have one of the worst extruders and hot end in the industry. I just converted one of my other machines to a MK8 with a Hexegon hot end and firmly believe that every 3D printer in the world should come with this style of hot end at the very least.
So far I am not too impressed with this Chitu board. Sure it has a touch screen and built in stepper drivers but compared to the Ramps/Arduino setup it just not as configurable. I may end up yanking the Chitu board out and put a ramps/arduino in there and be done with it if I cant get this board to work like I want.
"I finally got my new extruder built and have been attempting to test the Chitu board for most of the day.
As you may remember I had a bad board and was sent a "new" board by your company. So today I got to do some real testing and I must say, this board is the worst excuse for a printer board that I have ever seen.
The board constantly reverses the X axis direction whenever I feed filament through the extruder. When told to "home" all the axis, the X axis goes the wrong direction after extruding. It works before extruding but not after.
Also the extruder will work for few seconds and then stutter and stop all together and will not move again until the machine is turned off and back on. I thought the board was corrupting the firmware some how but I have checked and reloaded firmware dozens of times. There is also no way to connect it and use repetier or simplify3d or any other software. Every model has to be loaded on the SD card and printed from the machine.
I am done trying to make this board work at any level. If there is someone out there that has made this board work for them then that is fine but my board is going in the trash. I would have had a Ramps board working weeks ago and been satisfied.
Good job making a board that is quite possibly the most functionality limited, rudimentary, entry board in history.
Can you provide a quick overview of the changes you made to get the mini running with Ramps, including the firmware and PC software you're using? I'm getting ready to do the same to resurrect a mini with dead USB and have the arduino/Ramps with the Repetier firmware loaded into the Arduino. Did you modify the extruder or use as is?
I moved all the end stops to be easier to calibrate everything. This took relocating and making all new mounts for the end stops. Minim for X-axis is to the right, for Y-axis is the table all the way forward, Z-axis is at the top. This mimics my other machines and makes set up and firmware calibration way easier.
Installed the board just like any other ramps Arduino boar installation.
Here is my installation http://www.pp3dp.com/forum/viewtopic.php?f=28&t=54821