arduino _delay uses a timer!

Be sure to be aware of “hidden” dependencies on AVR hardware! The arduino GLCD lib (build 442) does use _delay( ms) (and therefore “timer0“) for it’s initial setup – and never after. If you’re trying to use timer0 for your own purposes – make sure you GLCD.Init(); first. After the display is set up, you… Read More »

spindle & cooling controller for grbl

So, spindle and cooling control with a lcd is coming up: connect to grbl via i2c 15-bits of rpm flood&mist cooling tool select (Tx) and tool change (M6) display a message (not yet integrated in grbl) It’s using a simple 1/2-byte protocol. UPDATE: Closed loop rpm control is working. Spindle is -off-. The servo pwm… Read More »

enhancing grbl 0.9e

Currently i’m testing a modified version of grbl 0.9e dev. My modifications include: i2c control for spindle (coolant currently disabled) grbl status via blink code of arduino LED homing will set coord to 0,0,0 (and not -offset) tool table support for diameter and xyz-offsets softlimits respect tool z-offset for usable space Things seem to work… Read More »

Raspberry Pi Fixes

Yey! Two fixes for raspberry pi firmware issues have gone in … #463 reenabling the screen from hdmi-power-down when rotation is 90/270 degrees #604 provide workaround for gstreamer and latest v4l2 drivers The combination of the two in one kernel is _the_ killer feature for digital signage.