X,Y,Z stepper steps test print
Description
This is a simple, fairly fast print with a 1mm thick and 5mm wide 100mm X 100mm cross in the X and Y axis, with a 5mm wide hollow box 50mm tall in the Z axis. How to use: Print this out, then connect your computer to your 3d printer with repetier host or other host program that has a G-code terminal that can send and receive information to/from your 3d printer. Send the M503 command in the terminal. You should receive back an "Echo" with your printers settings. Look for M92. It should look something like this: M92 X105.30 Y105.00 Z400.00 E100.00 (note: don't use these made up numbers) For instance, X105.30 means your X axis stepper motor is set to 105.30 steps/mm. Write down these numbers from the M92 that you received in the terminal and get a calculator handy. You measure the X, Y, and Z axis' from the print using digital calipers set to read in mm. Remember, X is side to side, Y is front to back, and Z is up and down. The hollow box should have printed at the back of the X axis, for stability. We now need to discover how many steps your printer took to make the print. We told the printer to move 100mm in the X axis, 100mm in the Y, and 50mm in the Z. Therefore, using the example numbers from m92 echo I made up; M92 X105.30 Y105.00 Z400.00 E100.00 Now, say the X axis did not print exactly 100mm as it should have, and the end to end length of the X axis measured with calipers is only 95mm. You multiply the X number from the m92 times how many mm you told the printer to move. 105.30 X 100 = 10530 steps taken However, it only moved 95, so we divide the total steps by the actual length, 10530 / 95 = 110.84 actual steps/mm We then do the same for all axis. Say the Y is accurate for this explanation. The Z axis box is only 50mm tall, but it is done exactly the same way. Say Z printed a box 51mm tall. 400 X 50 = 20000 20000 / 51 = 392.16 actual steps/mm We would then have all the numbers for X, Y, and Z. We would type these numbers into the terminal using the M92 command. M92 X110.84 Y105.00 Z392.16 E100.00 This would change the information in the eprom temporarily to the correct values. We would then type the M500 command to store it permanently. Afterwards, type M503 again and the echo should show the new values. Unplug your computer from the printer. Print a new test using the new numbers stored in eprom and remeasure. The numbers should be close to dead on accurate. If a little off, calculate again using the same method and plug the new numbers in using the terminal. You are doing pretty good if the numbers are within .05mm of desired. You are done!
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