I’m not skilled enough to start from scratch :D No shame there, because nobody starts out knowing this stuff ... A cheap Chinese CNC machine kit (considerable assembly required) from Amazon (cheaper elsewhere, your choice): https://www.amazon.com/Control-Engraving-240x180x45mm-Beauty-Star/dp/B07169...

What I am doing is not a FDM process At the risk of asking too much, then why are you basing whatever you're doing on hardware and a toolchain specifically designed for FDM-style 3D printing? If you're scanning the transducer at a fixed height in a pattern on the XY plane, perhaps G-Code generated ...

Let’s say I use a 5A linear PSU to power the Rambo, will it simply cause the heat bed to heat slower? The platform heater will overload the power supply, which will promptly shut down. The supplier of the transducer has said not to use switching mode PSU I'd expect a 75 W ultrasonic emitter (heater...

You might be able to use Marlin's "DISABLE_E" configuration option, which will disable the stepper driver immediately when it's not being used. You can then swap the E0_ENABLE and HEATER_0_PIN numbers in pins_RAMBO.h. Make sure your TEMP_SENSOR_0 is 999, and TEMP_SENSOR_BED set to 998, and DUMMY_TH...

You might be able to use Marlin's "DISABLE_E" configuration option, which will disable the stepper driver immediately when it's not being used. You can then swap the E0_ENABLE and HEATER_0_PIN numbers in pins_RAMBO.h. Make sure your TEMP_SENSOR_0 is 999, and TEMP_SENSOR_BED set to 998, and DUMMY_TH...

Use your other option. There are 3 sets of wires going into RAMBo's power supply -- the top set (nearest the blue fuse) are -/+ heater, then the next two are -/+ heaters/logic, and the last two are -/+ for the motors. Remove the middle two wires and use your own linear supply. That said, I'm on Ed'...

Thanks Ed, those were the type of PSUs I was looking at as well. Instead of extrusion with FDM, I am powering an ultrasound transducer via other circuitry. I’m not sure whether I require a heat bed. Transducer won’t use more than about 2-3A. Let’s say I use a 5A linear PSU to power the Rambo, will i...

Thanks Ed What I am doing is not a FDM process, so instantaneous response is achievable for intended purposes. Instead of an extruder, I’m powering an ultrasound transducer via other circuitry. Just need to turn on or off with printing moves, which I was hoping the power could be supplied from Rambo...

For a specific application, I would like to power the extruder heater only during printing and power off for travel moves. For example: M104 S0 G1 F... G1 ......... M104 S200 G1 ......... F.... E.... I tried search and replace but it is difficult. Is it possible to do this with custom g code? I have...

For a specific application where I am using high frequency device with the printer, I require a linear mode power supply to power the extruder heater mosfets. The switching mode power supply just would not work. Does Makergear provide a linear mode PSU? I suspect it would be larger. Or does anyone h...