Search found 4 matches

by hugov
Mon Nov 02, 2015 1:55 pm
Forum: Mini Spindles - Purchased
Topic: 400 watt brushless spindle and controller
Replies: 59
Views: 35993

Re: 400 watt brushless spindle and controller

Is there a consensus on which controller (blue or black) is better yet? Has anyone had both running?
by hugov
Thu Oct 03, 2013 10:40 am
Forum: Electronics
Topic: STMicro Drivers
Replies: 34
Views: 12844

Re: STMicro Drivers

So you are at or over the edge of what the ST is rated for (3 amps), and well under it's 7 amp peak. I still don't know what that means - what is "peak"? if 3 amps is RMS then the peak is 3 x 1.414... (4.2...amps). What does 7 amps mean, exactly? RMS is just a way of time-averaging current, and it'...
by hugov
Thu Oct 03, 2013 10:19 am
Forum: Electronics
Topic: Kickstarter for Smoothieboard
Replies: 7
Views: 2436

Re: Kickstarter for Smoothieboard

if the SW can live with 16KB RAM/128KB Flash instead of 64KB RAM/512KB Flash and only half the speed...
An AVR at 48 MHz is *not* half the speed of a ARM Cortex-M3 at 100 MHz. Probably more like <20% of the speed when doing path planning maths...
by hugov
Mon Nov 12, 2012 11:19 pm
Forum: For Sale
Topic: Magnetic Linear Encoder - pcb/kit
Replies: 6
Views: 3740

Re: Magnetic Linear Encoder - pcb/kit

Note that the magnet is just magnetic tape. This solution can scale to whatever size Shapeoko you've built for a few dollars. This is really nice for us. I had a look at this IC and think you're mistaken about the tape: it's not "just" magnetic tape, it's special tape that has alternative N-S poles...