HobbyCNC Blog

The Power of Checklists

I've started using checklists. A few nights ago I made a small, careless mistake and wrecked one of my nice 60 degree milling bits (at $14 a pop). My 'favorite' mistakes include: restarting LinuxCNC and forgetting to reload my program forgetting to connect the probe...

read more

Where has all the power gone?

Making sure your stepper motor wiring is robust and secure is critical. Most (all?) stepper motor driver instructions include the warning "do not connect/disconnect motors while power is applied". Curious why? A brief-yet-incomplete intro to stepper motors is...

read more

We all make misteaks

I recently assembled 5 PRO 4-axis boards. I'm pretty careful. I follow directions. I am quite familiar with the boards. Only 60% (three out of five for you non-math types) worked first time! Oh the shame.  Careful(er) visual inspection revealed the problems: One...

read more

Tech Support – The Voltages Are All Wrong!

Had an interesting tech support problem last week. The customer was measuring wrong voltages all over his HobbyCNC board. The 5 Volt test point measured 4.85 Volts. The test point should be between 4.95 and 5.05 Volts (5 Volts +/- 1%). The output of the LM317HV should...

read more

To Shield or Not To Shield (your wiring)

Should you use shielded wire or not? I don't use any shielded wire on my DIY CNC, and I haven't had any noise or 'phantom triggers'. I do notice interference (like a 'fuzzyness') on my computer monitor when I hit the power to my stepper motors, however, but that is...

read more

KiCAD, FlatCAM and milling slots in a PC Board

I needed a quick-and-dirty 36VDC unregulated linear power supply to drive some HobbyCNC boards on my test system. I wanted the bridge rectifier to mount directly to the PC board.  The beefy bridge rectifier that I had in my stock was the type with the large spade-type...

read more

KiCAD and FlatCAM to isolation route PCBs

EDIT: I have documented the KiCAD to G-code process here: hobbycnc.com/pc_board_isolation_routing/ As a follow-up to my last post on Autodesk and Eagle, I did my first PCB isolation routing using the KiCAD and FlatCAM to LinuxCNC toolchain. I did schematic capture and...

read more

Eagle and Autocad

One thing I use my DIY CNC machine for is milling PC Boards (it's technically called "isolation routing"). This is fairly fast, inexpensive, accurate and uses zero nasty chemicals. I'd been using Eagle Schematic & PCB design software. Great product, works very...

read more

What’s all this about BreakOut Boards (BOB)

A BreakOut Board - a BOB for short, takes an input, typically from a computer or a ethernet/USB-to-parallel converter and splits up the signals into individual pins. These pins are then wired to individual stepper driver boards.  Most stepper driver boards require two...

read more

Pin It on Pinterest

Share This