welcome to my store Description Ramps is short for reprap Arduino mega pololu shield, it is mainly designed for the purpose of using pololu stepper driven board (similar to 4988 driven board). Ramps can only work when connected to its mother board Mega 2560 and 4988/DRV8825. Owning to its stability in operation and great compatibility with most 3Dprinter (all reprap-model such as pursa i2 and i3). The combination of Ramps1.4+MEGA2560+A4988/DRV8825 is becoming a mainstream of DIY 3D printer control board. Features 1. Standard interfaces (as that of extruder) 2. Reserved GCI like I2C and RS232 3 MOSFET 3 MOSFET are applied to the heater/ fan and thermistor circuit. 4. Adding another 5A to protect the component parts. 5. An 11A fuse is added to the hotbed 6. Support 5 stepper drive board 7. The adoption of Pin Header as pololu makes it more convenient to repair or change. 8. I2C and SPI are reserved for expanding 9. All the MOSFET can be controlled by PWM 10. Use the interface of servo motor to adjust the level of printing platform automatically. 11. Adding a SD module for SD ramps module. 12. LED can indicate the status of the heater (the open and close of MOS). 13. 2 stepper motor for Z axis in parallel. Overview and Hardware Weight: 68g Size: 102mm*60mm Software Compiling environment: Arduino IDE Firmware: Marlin PC software: Printrun, Repetier-Host Source Printrun:[1] Repetier-Host:[2] Arduino IDE:[3] Arduino IDE:[4] Marlin:[5] Interface Interface Layout Interface specifications 2 power interfaces 12v 11a/12v 5a 6 motors (one for X axis, one for Y axis, 2 for Z axis, 2 for extruder 2 interfaces for LCD&SD 6 interfaces for end stop(X/Y/Z min, X/Y/Z max) 3 interfaces for PWM (one for hotbed, one for fan and one for extruder) 3 interfaces for thermistor Jumper Instruction Step size of stepper driver (A4988) jumper Yes/No stepsize ms1 ms2 ms3 no no no fullstep yes no no halfstep no yes no 1/4step yes yes no 1/8step yes yes yes 1/16step Step size of stepper driver (Drv8825) jumper Yes/No step size ms1 ms2 ms3 no no no full step yes no no half step no yes no 1/4 step yes yes no 1/4 step no no yes 1/16 step yes no yes 1/32 step no yes yes 1/32step yes yes yes 1/32step FAQS 1.How many extruders can ramps support? Ramps 1.4 support 5 A4988 driving boards, which are for X/Y/Z/axis and 2 extruders respectively, so the ramps can support at most 2 extruders. 2. What should I note when provide power for ramps? The recommended power supply for Ramps is 12V, especially for Mega2560. If supplied over 12v, Mega will over heat, resulting in instability of operation, the serial port communication is was at times strong and at other times weak. Do make sure the power is 12v, if you don’t have switching power supply of 12v, please take down the diode D1 on Ramps if you use a greater power supply. The current is decided by the use of hotbed. If you use a hotbed, an idea power supply is 12v 17A, 200W. If not, 5A is enough. 3. Can fan be added to Ramps? Yes. If you use only one extruder, you can connect the fan to the 2 pins in the middle of the 6 blue output pins. If you use two extruders, the fan cannot be connected to ramps directly; you should connect it to a power source that is controlled manually. Or you can build an external circuit, the pins of which should be set in the firmware, 4. What is the difference between ramps and ultimaker? In the respect of function, they are totally alike. But there are some difference, one lies in the configuration of I/O pins. Another lies in the way of reading temperature. Ultimaker uses thermocouple and temperature control board (AD597), ramps uses NTC thermistor 100K. If you want to use thermocouple and temperature control board for ramps, you should take down the pull-up resistor one the thermistor of hot end. 5. Can Ramps replace ultimaker to make an ultimaker printer? Yes, it can, but you need to pay attention to the points we’ve mentioned in chapter V .The ultimaker printer is one kind of reprap, as well as standard three- axis rectangular coordinates 6. The temperature displayed is not normal. A. you may select the wrong thermistor in marlin, we often choose 1. B. The thermistor is Brocken or there is short-circuit occurred in the 2 pins of the thermistor. C. The electrolytic capacitor on ramps is broken. 7. The motor jitters. A. It is a matter of poor connection, B. A4988 has broke down, C, the VREF is not right. 8. The scope of motor is too small. You may forget putting the jumper cap, or the parameter you set is wrong. 9. The program uploading is not successful. The USB cable doesn’t work; the version of Arduino IDE you use is not compatible; the select of COM is wrong. 10. The hotbed and extruder can’t heat. A. The MOSFET is broken. B. The thermistor is not connected. 11 the motor of extruder doesn’t work. The thermistor is not connected; the temperature is not enough; A4988 broke down; ramps 1.4 broke down. Package list: 1 x Geeetech RAMPS1.4 Payment 1.We accept PayPal only. 2.Payment must be received within 7 business days of auction closing.,or a unpaid case will be opened. Delivery details 1.Standard shipping carrier is ePacket with tracking code for United States address,delivery within 7-14 busienss days. 2.For outside US address,standard shipping carrier is Hong Kong Post without tracking code,delivery within 25-30 business days. We provide a free tracking for order above 45USD. Please contact us if you want to add a tracking code for small orders. 3.Express shipping like DHL,Fedex,UPS,TNT is also avaiable if you are willing to pay extra. DHL is our standard shipping carrier for Expedited shipping,please contact us if you want a different carrier. 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