Arduino mega 2560 with ramps 1.4 pinout drivers#
Arduino mega 2560 with ramps 1.4 pinout driver#

There are even all-in-one solutions that should work - like SainSmart 2 in 1 that supports 24VDC, and the MKS Gen-L both seem to have a Mega2560 with crystal oscillator, and if so, no PPS required.

Arduino mega 2560 with ramps 1.4 pinout drivers#

Just watch that the tin-can stepper isn't designed for much above about 3 or 4V since the current chopping drivers we use want 3-4x the design voltage (and we are limited to 12V by some but not all RAMPS1.4/1.5 boards.) For these often an A4988 is all you need and the more advanced stepper drivers offer little improvement. If using 'tin-can' permanent magnet stepper motors the results (goto speed, tracking accuracy) usually aren't great but it can be workable.Ability to control DEW HEATERS (preliminary support added in OnStep version 1.3.a).Runs RA(Azm), Dec(Alt), two Focusers, and a Rotator.NO SOLDERING, unless one wants to connect the M0/M1/M2 pins of the stepper drivers.Another option is to find a Mega2560 with a crystal oscillator (such as the MKS Gen-L all in one board). The latter is supported in version 1.3.a and later. The former has support in versions 1.1.f and later. There are two solutions for this: Add an RTC the DS3234 RTC (a bit more expensive), and the DS3231 (cheap). We often need to address the Mega2560 resonator clock's poor accuracy (add a PPS pulse-per-second source).

Arduino mega 2560 with ramps 1.4 pinout driver#

More limited 'official' stepper driver support and a little extra work to use the best stepper drivers if you need them.

Most RAMPS14 shields lack of support for stepper voltages above 12V.

The Mega2560 is a slower (than other options) 16MHz 8-bit MCU and can sometimes limit slew speeds depending on drive design and stepper driver configuration.

Please read the RAMPS 1.4 WiKi for more information (especially about safety and limitations) and schematics that detail how the various pins are wired. OnStep can use different 'pin maps' and RAMPS1.4/1.5 support is in file. It can also be a solder free solution for those who are not technically adept at that. The advantage of this version, is that it is low cost, since the RAMPS boards are very cheap on eBay.

can be purchased as a kit on eBay for <$19 delivered (US.) The RAMPS 1.5 board is identical to the 1.4 version, but with better fuses and better heat dissipation on the MOSFET's. In fact, the RAMPS1.4, Arduino Mega2560, 5 x A4988 Stepper Drivers, heat sinks, USB cable, etc. When combined with the RAMPS 1.4 board ($8-$10), it is a low cost solution for building an OnStep controller. The Arduino Mega2560 is an 8-bit micro-controller.