[Emc-users] BBB 14: unexpected realtime delay on RT thread 1

2014-01-14 Thread Bas de Bruijn
I’m having an error resulting in missing steps so the layers I’m printing shift. The file I print is pretty big (17MB). But the error does not happen at the same hight. How can i find what’s happening? Do i need to switch off the screensaver for example? or is there something else i can check?

Re: [Emc-users] BBB 14: unexpected realtime delay on RT thread 1

2014-01-14 Thread Sebastian Kuzminsky
On 1/14/14 11:07 , Bas de Bruijn wrote: I’m having an error resulting in missing steps so the layers I’m printing shift. The file I print is pretty big (17MB). But the error does not happen at the same hight. How can i find what’s happening? Do i need to switch off the screensaver for

Re: [Emc-users] BBB 14: unexpected realtime delay on RT thread 1

2014-01-14 Thread Bas de Bruijn
Yes, the BeagleBone Black, the PRU is hat 10us step length and 1us step time. The servo task period, in nano sec is 100. When i run a latency test i get a jitter of approximately 56000 to 6 ns max Jitter I’ll disable the screensaver to check. On 14 Jan 2014, at 19:13, Sebastian

Re: [Emc-users] BBB 14: unexpected realtime delay on RT thread 1

2014-01-14 Thread Charles Steinkuehler
On 1/14/2014 12:21 PM, Bas de Bruijn wrote: Yes, the BeagleBone Black, the PRU is hat 10us step length and 1us step time. The servo task period, in nano sec is 100. When i run a latency test i get a jitter of approximately 56000 to 6 ns max Jitter I’ll disable the screensaver to

Re: [Emc-users] BBB 14: unexpected realtime delay on RT thread 1

2014-01-14 Thread Bas de Bruijn
Maybe the error generated has nothing to do with the missing steps per se, it just got me triggered. I have acceleration about 2000 and I’ll turn it down some more. Other parts got printed without problems. I’ll review the tension on my belts. On the arduino clone I have approx 1000 mm/s^2

Re: [Emc-users] BBB 14: unexpected realtime delay on RT thread 1

2014-01-14 Thread Michael Haberler
Am 14.01.2014 um 19:33 schrieb Charles Steinkuehler char...@steinkuehler.net: On 1/14/2014 12:21 PM, Bas de Bruijn wrote: Yes, the BeagleBone Black, the PRU is hat 10us step length and 1us step time. The PRU code cannot cause an unexpected realtime delay, since this is a message generated

Re: [Emc-users] BBB 14: unexpected realtime delay on RT thread 1

2014-01-14 Thread Bas de Bruijn
I’ll start looking. Thanks for the pointer On 14 Jan 2014, at 19:57, Michael Haberler mai...@mah.priv.at wrote: Am 14.01.2014 um 19:33 schrieb Charles Steinkuehler char...@steinkuehler.net: On 1/14/2014 12:21 PM, Bas de Bruijn wrote: Yes, the BeagleBone Black, the PRU is hat 10us step