CR-7/8/10 3D Printer 研究社 造訪社團 » 用戶發文

wow!! Good Job!!

lucky cat (y)

SO CUTE!!

You need cool fan.

why?

On the top of ear.

That's me :) I removed some defect and then burned a little bit to make it black and not grey again.

try this
https://www.facebook.com/groups/1660856287478650/1673885972842348/

I can't get it printed with a raft, it does not stick to the raft itself... What Cura settings do you use?

Isn't there any number writing on this component?

No, I cant see anything. It's either burned out or is not marked.

I find that "78L05 SMD" is similar to this component,but I can't promise it is.

just a 12v to 5 v LDO ic

http://reprap.org/wiki/Melzi

請問這台的PCB叫什麼啊?

哈 我英文不好 這是廠家或是誰自己改的樣子,但是電路上還是基於melzi板,或許只是外形轉變了

主控ic ATMEGA1284P

ok了解

是melzi 1.0.0

板子不在身邊 ,cr-7好像是用4988+1284p

你有改過這台的韌體嗎?

這台韌體是開源的 marlin 1.0 廠商有放出來給團購的人,裡面其實沒什麼改,只有pid數據改過而已

pid是?

噴頭在做自動控制的回授參數

了解，所以我之後如果想增加印的範圍就可以去韌體,然後加長軌道這樣對嗎? 因為剛剛有研究了一下韌體的程式碼，蠻好懂得

我等等來po一下兩個韌體的差異

# define BAUDRATE 115200
#define MOTHERBOARD 63

#define PID_dT ((OVERSAMPLENR * 8.0)/(F_CPU / 64.0 / 256.0)) //sampling period of the temperature routine

#define X_MAX_POS 130
#define Y_MAX_POS 150
#define Z_MAX_POS 100

只有這幾個部分比較值得提

其他什麼溫敏電阻xyz限位開關常開常閉的就照常就好

(OVERSAMPLENR * 8.0)開源原始碼是10

所以我PID的那行照打，但maxposition就可以自己改自己想要的意思嗎?

嘿 PID不改我覺得也沒差XD但是我說的照常是照i3的照常喔,不是照開源下載下來的預設值

所以除了這樣 其他都跟marlin發布的開源碼是一樣的嗎?

這樣說好了 除了我打的部分 其他都照i3慣用的marlin設定就可以了

https://github.com/....../Release/Marlin/Configuration.h

請問是這個嗎?

這是最初始的marlin版本 不適用也不專用於i3結構

https://github.com/....../Marlin/Marlin/Configuration.h

那是這個囉?

https://github.com/....../tree/master/Firmware/Marlin

你找好快阿XD

直接在關鍵字加上i3就找到了

ok了解，重點就是那Configuration.h可以自己客制就是了

這以這樣裡解,Configuration.h算是把程式要執行的參數全部拉出來讓其他人可以快速修改,當然也不排除cr-7廠商有改其他的副程式,但是即便有改我認為影響不大,因為大多數的參數比照最初始版的marlin顯然沒動。
附帶一提 cr-7廠家使用"1.0.0" 現在最新抓到的都是"1.0.2",但如果程式設計上沒問題應該都是向下相容的

那現在裡面的韌體可以備份嗎?XD 怕搞砸

XD 可以阿,去用個usbasp插上去板子旁邊的icsp腳,開啟progisp之類的軟體按read flash存起來就好

ok,這部分我可能要研究一下,感謝你!!

Huang Lin-Chieh 好專業!

In english please

看情况是哪里短路了

Sounds Dangerous! So did spark come out when the adapter plugin or usb plugin?
幫樓主翻譯：他把變壓器和USB插上去然後冒火，然後usb hub和變壓器就燒掉了

First time power adaptor was already in. Next time usb was connected and I connected power. Is the electronics board actually standard?

Does anybody have a clue about electronics? Can I actually use 12v power supply that has less or more then 8A?

I would suggest you use adaptor more then 8A.

Did you measure how much it actually draws?

Not exactly mesure the current. but there is someone who measued power before and it is about 100W at maximum.

ok, good to know. I have ordered 120w power supply now.

This is how the board looks like now.

The seller wants 70USD for new board, power supply and shipping!

You may reference the URL http://superuser.com/....../laptop-should-one-plug-the......
Turning on

plug power lead into laptop
plug power lead into electrical outlet
switch on at electrical outlet (if applicable in your locale)
switch on at laptop

英文好差...看得懂但無法溝通

My PCB is definitely dead... New power supply arrived but only the red lights go on and it smells burned. The seller will ship new PCB but I need to pay the shipping cost. This means waiting and no printing.
Do you guys know what PCB is this actually? Something custom?

This PCB is custom. But I think if someone is pro on DIY 3DP, he can use other PCB, e.g. RAMPS. After all, other unit are motor and inching switch and hot system.
原廠PCB是客製化的，但如果夠強的人，應該也可以用其他PCB版去改。畢竟PCB只是控制馬達、加熱頭、微動。

http://reprap.org/wiki/Melzi cr-7 's pcb base on this project ,you can change another open souce pcb to change it.ex:ramps

http://reprap.org/wiki/Ramps

看到fried我還以為是在說什麼好吃的東西XD

請教一下~所以Melzi是不是把RAMPS1.4和Arduino整合在板上的東西?

可以說是可以說不是 melzi核心跟arduinomega2560不一樣

Melzi是專指使用ATmega1284P的核心嗎,ATmega1284p和Mega2560只是不同的MCU囉?

以melzi的作者原本的意思是這樣沒錯

原來如此~同樣的邏輯Mega2560為MCU的整合板剛剛找了一下資料叫做Megatronics
http://reprap.org/wiki/Megatronics_2.0

So I tried to exchange the IC mentioned but no luck yet... New IC is becomming hot very fast so I think there is a short circuit somewhere in the usb circuit. I need support from an electronics specialist to debug it. The seller has sent the new board but it would be interesting to repair this one, at least for SD only printing

you can printing by SD card ,so this red circuit work good

the usb 5v power is called "uvcc" ,and I guess the uvcc to Vreg/USB selector pin are only one way to link,so use the ameter check it , before you use usb again . (if your pinset is Vreg&vcc the ohm between uvcc&gnd must approaches infinity)

So the USB Port seems to be OK, i have no coductivity if the jumper is set to vreg. But when I connect 12v the reading between gnd and output of the 7805 IC is only 0.4v. Shouldn't it be 5v?

it should be 5v,,but you can printing by SD? if it just 0.4v ,the system shouldn't work..

OK, tried all options. 5v from USB or through the IC. no luck. With 5v through USB the red LED goes on but that's all, screen shows nothing. So I am waiting for the replacement board :(

print speed 25mm/s
bottom layer 20mm/s
infill 40mm/s

print speed 40mm/s
bottom layer 35mm/s
infill 20mm/s

I heard that belt is not so easy to get aging. Fan is easy to buy in Taiwan. The most wanted thing for me is threaded rod.
我聽說皮帶沒那麼容易老化，只要沒斷再繃緊就好。風扇台灣很好買，電料行都有。我目前最想要買的是牙條。

林大、你太貼心了、還有中英文對照！！！！！

我還以為是我按了FB的翻譯功能 !!XD

welcome! sorry for reject you serveral times

各位同學出來打個招呼阿~會英文的加一下cc ! 小七 進軍國際!! https://www.facebook.com/groups/1665481803689682/

I'm curious about where did you get information of CR-7? And you buy it right?

I bought it, still waiting for the package to arrive. I saw Freaks3D printer on Indiegogo and started researching and then found the same design on AliExpress.

Wow～～～Welcome^^(我只會這句…哈哈…）

Yea! read the 英文(English)/Step 0 - Packing List/2Read Before Installation.pdf (in sd card) carefully before you assemble it,the more carefully you read, the less problem you'll meet (little advice) :D