亚洲欧美日韩一区成人|日韩少妇一区二区无码|91久久澡人人爽人人添|日韩欧美一区二区三区高清|国产一区二区三区乱码网站|国产乱码一区二区三区下载|精品久久久久久久久久久久久|日本高清一区二区三区不卡免费

RepRap的X_STEPS_PER_MM參數(shù)

開源技術(shù)
2013
01/31
00:11
分享
評(píng)論
背景介紹:
參數(shù)Steps per mm:這個(gè)參數(shù)是決定了工作臺(tái)每運(yùn)動(dòng)1mm,步進(jìn)電機(jī)需要多少個(gè)脈沖。
計(jì)算方法(公式)=(步進(jìn)電機(jī)旋轉(zhuǎn)1圈的標(biāo)準(zhǔn)脈沖數(shù)*驅(qū)動(dòng)器細(xì)分?jǐn)?shù))/絲杠導(dǎo)程(導(dǎo)程也就是螺距,如果絲杠不是直接連接電機(jī)而是通過減速后連接則計(jì)算結(jié)果還需要再乘以減速比)
例如:1.8度/脈沖的步進(jìn)電機(jī)旋轉(zhuǎn)1圈需要360/1.8度=200個(gè)脈沖。驅(qū)動(dòng)器使用8細(xì)分,絲杠導(dǎo)程為2.5mm。
      Steps per=200*8/2.5=640個(gè)脈沖
http://reprap.org/wiki/Arduino_GCode_Interpreter
Usage
Firmware Configuration
In order for the firmware to operate properly, you must configure the proper variables in the firmware and then upload the firmware to your Arduino. The values are stored in the file _init.pde. An example version is included in the distribution called _init.pde.dist.
We'll cover each of the variables below:
X_STEPS_PER_INCH
This variable stores how many steps to take to move the X axis 1 inch. You will need to set this as accurately as possible if you want your machine to be accurate. There are two ways to set it:
Move and Measure - slap a pen or marker on as a toolhead and draw a 1000 step line. Measure it and divide 1000 by the length in inches.
Calculate Step Size - this one is the preferred way of doing things. Its rather easy to calculate step size based on your drive mechanism.
For threaded rod drive systems:
Find your TPI (threads per inch). for example, 1/4"-20 threaded rod means that there are 20 threads per inch (aka 20 turns = 1 inch.) Simply take that number and multiply it by the steps in a revolution. With a 400 step motor, it would be 8000 steps per inch.
For belt/pulley systems:
Find the circumference of your drive pulley. (remember circumference = 2*pi*r) (say: 2.75")
Calculate step size (ie: circumference / steps per revolution) (say: 2.75" / 400 = 0.00625")
Divide 1 inch by step size (1" / 0.00625" = 160 steps/inch)
X_STEPS_PER_MM
This variable stores how many steps to take to move the X axis 1mm. You can either calculate it independently, or take the number above and divide by 25.4.
實(shí)際設(shè)置:
在用雕刻機(jī)改裝成RepRap的過程中,遇到問題。電腦上面發(fā)指令走100mm,機(jī)器實(shí)際上只走了25mm。查閱資料無數(shù),始終不得要領(lǐng)。
根據(jù)上面的知識(shí),理論上X_STEPS_PER_MM的設(shè)置應(yīng)該是160(雕刻機(jī)原來是8細(xì)分,320 steps per mm,絲杠導(dǎo)程為5mm)。RepRap默認(rèn)是4細(xì)分的。
可是實(shí)際上,當(dāng)設(shè)置超過18以后,就走不動(dòng)了。A3977的電流、細(xì)分都調(diào)過。始終無法解決。
在“process_g_code.pde”里面,把收到的GCode都加大4倍,可以暫時(shí)解決這個(gè)問題
  1. //did we get a gcode?
  2. if (gc.seen & GCODE_G)
  3. {
  4. last_gcode_g = gc.G; /* remember this for future instructions */
  5. fp = where_i_am;
  6. if (abs_mode)
  7. {
  8. if (gc.seen & GCODE_X)
  9. fp.x = gc.X;
  10. if (gc.seen & GCODE_Y)
  11. fp.y = gc.Y;
  12. if (gc.seen & GCODE_Z)
  13. fp.z = gc.Z;
  14. if (gc.seen & GCODE_E)
  15. fp.e = gc.E;
  16. }
  17. else
  18. {
  19. if (gc.seen & GCODE_X)
  20. fp.x += gc.X;
  21. if (gc.seen & GCODE_Y)
  22. fp.y += gc.Y;
  23. if (gc.seen & GCODE_Z)
  24. fp.z += gc.Z;
  25. if (gc.seen & GCODE_E)
  26. fp.e += gc.E;
  27. }
復(fù)制代碼
回復(fù)

使用道具 舉報(bào)

2#
2013-3-3 13:16:53 | 只看該作者
這是參數(shù)還是比較難懂!只是對(duì)于我來說。

推動(dòng)3D打印

關(guān)注南極熊

通知

聯(lián)系QQ/微信9:00-16:00

392908259

南極熊3D打印網(wǎng)

致力于推動(dòng)3D打印產(chǎn)業(yè)發(fā)展

Copyright © 2024 南極熊 By 3D打印 ( 京ICP備14042416號(hào)-1 ) 京公網(wǎng)安備11010802043351
快速回復(fù) 返回列表 返回頂部
康平县| 永吉县| 德兴市| 长治县| 台东县| 凌源市| 建水县| 固原市| 临海市| 龙川县| 墨玉县| 太原市| 遂溪县| 云阳县| 新津县| 云阳县| 依兰县| 山丹县| 山阳县| 灵宝市| 紫阳县| 库车县| 富川| 呼伦贝尔市| 曲松县| 通许县| 库伦旗| 平武县| 梁平县| 普安县| 江孜县| 江津市| 昌乐县| 巩义市| 白沙| 兴安盟| 晋江市| 唐海县| 手机| 司法| 吉木乃县|