Re: [Emc-developers] hostmot2 stepping folowing error oddity

2009-10-18 Thread Sebastian Kuzminsky
Chris Morley wrote: I switched to the .8 max velocity. It still errors. It is still magnitudes worse in the negative direction. I didn't have time to make scope screenshots nor test very much. I can tomorrow if you would like. I'm seeing something fishy here too, with ferrors when the

Re: [Emc-developers] hostmot2 stepping folowing error oddity

2009-10-18 Thread Sebastian Kuzminsky
Sebastian Kuzminsky wrote: So... If the human asks for (for example) 1 microsecond StepLen+StepSpace, and the driver thinks the stepgen clock runs at 33,000,000 ticks/second, then it's going to ask for 33 ticks. But if the stepgen clock in reality runs at 30 MHz, then those 33 ticks will

Re: [Emc-developers] hostmot2 stepping folowing error oddity

2009-10-18 Thread Peter C. Wallace
On Sun, 18 Oct 2009, Sebastian Kuzminsky wrote: Date: Sun, 18 Oct 2009 20:47:32 -0600 From: Sebastian Kuzminsky s...@highlab.com Reply-To: EMC developers emc-developers@lists.sourceforge.net To: EMC developers emc-developers@lists.sourceforge.net Subject: Re: [Emc-developers] hostmot2