Bart Dring had created a cape called a Rosetta Bone which could use either a grbl shield, a parallel port or a ramps shield.. Bart had gifted me a blank board which worked fine for the parallel port, but had some issues with the ramps.. so the cape never really got into production.
I noticed that Alex has created a cape for a parallel port that you can get from OSH park. This probably would work. https://github.com/machinekoder/bb-parallel-port-cape On Fri, Mar 23, 2018, 4:01 PM mrarmyant <[email protected]> wrote: > How did you get the G540 to work with the bbb? Been looking all over the > place on how to get a parallel port out of it. > > On Wednesday, February 1, 2017 at 12:10:49 AM UTC-6, Tom M wrote: >> >> >> We almost almost finished configuring our cnc build at the makerspace I >> belong to. >> >> Since the G540 has a charge pump, we thought we would take advantage of >> it. >> (We we're debating if we even need to since we don't think the bbb has >> the start issues that a pc parallel port does. >> >> My understanding is that the G540 needs a charge pump frequency of 10Khz >> >> It seems that config files that we started with was only setup with a >> 500hz servo-thread >> >> I suspect the servo thread is setup within the calls made at this line.. >> >> https://github.com/Workshop88/machinekit/blob/OptimizePru/configs/ARM/BeagleBone/RosettaBoneGecko/RosettaBoneGecko.hal#L43 >> ) >> Is this correct? >> >> We tried setting up a 10Khz thread here: >> https://github.com/Workshop88/machinekit/blob/OptimizePru/configs/ARM/BeagleBone/RosettaBoneGecko/RosettaBoneGecko.hal#L31 >> When we put a scope on the charge pump signal it was very erratic and the >> gecko faulted. (I was fine when it was on the servo thread but too slow) >> (When we had the charge pump hooked to the 500Hz servo thread we got a >> very nice signal. >> >> Are there any technical issues regarding the BBB that I'm not taking >> account? >> Thanks, >> Tom >> >> >> http://wiki.linuxcnc.org/cgi-bin/wiki.pl?About_Charge_Pumps >> > -- > website: http://www.machinekit.io blog: http://blog.machinekit.io github: > https://github.com/machinekit > --- > You received this message because you are subscribed to a topic in the > Google Groups "Machinekit" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/machinekit/Mv7X6ddtPD4/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > Visit this group at https://groups.google.com/group/machinekit. > For more options, visit https://groups.google.com/d/optout. > -- website: http://www.machinekit.io blog: http://blog.machinekit.io github: https://github.com/machinekit --- You received this message because you are subscribed to the Google Groups "Machinekit" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. Visit this group at https://groups.google.com/group/machinekit. For more options, visit https://groups.google.com/d/optout.
