![]() Stepper motor specifications: Tevion 2400 dpi / Microtek 5800 Epson Stylus Photo 925 Phase 2 2 Step angel 3,75°/Step = 96 steps 7,5°/Step = 48 steps Voltage 5 V 5-12 V Current ? Resistance 5,5 Ω 7 Ω Holding torque ? Later in the process I found out that both motors draw less then at least 300 mA. Vaseline should dampen the negative effect. It moves slower than the scanner stepper and clatters on the rod. In the end I realized that the 48 steps or the motor itself are the weak spot in this built. This motor (and plates for printer head) serves as the y-axis. Turning the shaft by hand and counting the steps I came up with 48 steps. It says it is a 4-phase 48 pole bipolar stepper motor for 42V (?) but as it is a bipolar stepper there must not be 4 phases but 2. The stepper I salvaged is oddly described in the Service Manual. Printer / Y-Axis The printer was an old Epson Stylus Photo 925. It is in german but the math shown there is a universal language (or use the google translator) The scanner stepper serves as the x-axis. If you are still curious how to calculate a gear ratio have a look at this page. It has a 4 gears mounted on its foreplate. There is something special about the stepper. Though the sled needed to be trimmed to give more space for the laser. The rail and the timing belt aswell as the sled which carried the photoelectronics is used. I used the bed of the scanner as the basis of the whole construction. Do not believe anyone other that says this is a 100 step motor. The stepper is a 96 step bipolar stepper motor. Scanner / X-Axis The scanner is an old Tevion 2400 dpi scanner. For the printer I had found a service manual. Identifing the parts of old devices is often a pain but I had luck with at least the scanner stepper. ![]() The older the more likely you are getting a unipolar stepper which we can't use in this project. The newer the printer, the lesser is the chance of getting steppers out of it. Scanner stepper motors are often superior to printer steppers. June, 1st 2013 : Added Step 13 - Alternate laser driver shield (Easylaser Shield) December, 4th 2013: Updated Alternative Easylaser Shield schematic/layout with the help of jduffy54.īefore you go an a salvage rampage consider the following hints: RULES OF THUMB Now contains more stuff you need May, 20th 2013 : Corrected mm/sec to mm/min ! Seconds would be very very fast. May, 13th 2013 : Added Step 17 - Links and files sectionĪdded Step 18 - Take it to the next step (Improvement - optional) Updated BOM list. UPDATES: May, 9th 2013 : Updated Step 14 : The Laser diode (pictures and some focus hints) ![]() I am constantly updating this so be sure to come back from time to time for further improvements. Arduino(clone) 10 € Easydriver x 2 20 € Electronic bits and pieces 10-15€ Aixiz housing /w lens 6 € Alu-profiles 5 € - Total 46-56€ Well I forgot the Laser Safety Glasses ( THIS IS A MUST!!): - SEE STEP 16 FOR LASER SAFETY GLASSES - Laser safety glasses 50 € New total 100 € Build time with knowledge acquisition and waiting for shipping was around 4 month. The building costs (without mispurchase ) is around 45-55 €. Red(ish) colors are a problem as well as they reflect all light in the red range spectrum. Those colors reflect the red laser beam to much. White and in general bright colors are hard if not impossible to work with. several plastics (could require several runs depending on thickness).paper (nearly every color but white/red).Just about right do cut some flip-flops (thongs) for the summer. Starting from mechanical stuff like self-replenishing brass bearings to electronical stuff like stepper motors and the difference between bi- and unipolar motors to soldering and etching my own circuit board. With the right motivation you can acquire almost any knowledge. So if you have the same requirements, don't let experts unsettle you. All I knew was that RED is (often) + and BLACK is (often) Ground. ![]() When I started I had absolutely no clue about electronics. I try to cover the questions that could arise in the process of making. It's more of a "how it can be done"-guide. Every scanner's and printer's mechanic is different so this can not be used as a step-by-step guide. Although, a lot (if not everything) of the mechnical construction requires ingenuity but I tried to document the complete build process as much as I could. The whole thing evolved around the instructable of Groover and his 'Pocket Laser Engraver'. ![]() This Frankenstein Laser Cutter was built out of an old scanner and printer. ![]()
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