On 1/28/2014 8:18 AM, Elias Bakken wrote: > Dave, I might be able to shed some more light on this, unless you are > completely set on making your own cape (Which is a lot of fun BTW :) > I am also biased since I have made the Replicape, but I'll try to be > objective and summarize the differences as I see them:
A great comparison, Elias. A few minor comments in-line. > Replicape - BeBoPr++ > 5 steppers - 4 steppers > Stepper current programmable by ADC - stepper current adjustable with a > trim-pot. > Microstepping programmable via SPI down to 1/32 nd - Microstepping with > dip switches down to 1/8 th (?) The BeBoPr uses 3 dip switches, and will support whatever mirco-stepping is available on your Pololu drivers of choice (ie: 1/16 or 1/32 if the driver supports it). This is just like the RAMPS or most other common 3D printer shields for the Arduino. > Stackable for LCD3/Reach or similar - Not stackable, but can use the > HDMI/I2C for display. > Low pass filter in analog input - Voltage clams on analog inputs There is low pass filtering on the BeBoPr analog inputs, as well as input protection. > No over-voltage protection on end-stops - ? All I/O on the BeBoPr is protected and level-shifted, including the end stops. > Open source Hardware, software and firmware - Open source software (?) > $179 - $120 (is this right for the ++ board?) + four stepper boards ($10 > each?) Bas has designed an add-on board to drive five steppers called the penta board: https://github.com/modmaker/BeBoPr/wiki/Penta-Stepper-Board ...you can also use the header the penta board connects to for driving off-board stepper drivers if you need more power (for driving a real milling machine, as an example). Both are great boards, and which one will work best depends on exactly what you're trying to do, whether you've got any Pololu drivers on-hand, etc. -- Charles Steinkuehler [email protected] -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
