On Thu, 2008-11-20 at 13:45 -0800, Peter C. Wallace wrote:
Is it possible your STEP and DIR inputs have optocouplers returned to 5V?.
This is known problem with the 5I20 (or any of our FPGA cards) outputs since
they only swing 0 to 3.3V.
I think this is the problem based upon page 45 of the
Matt, (and everyone else)
Thanks, I think you are right. I won't get a chance to test it until
Tuesday, but will let you know.
Regards,
Eric
I don't think 3.3 Volts will be enough because the recommended R_series in
Figure 7.7 is 0 ohms for 5 Volts, meaning there is either an existing series
Matt Shaver wrote:
On Thu, 2008-11-20 at 13:45 -0800, Peter C. Wallace wrote:
2. If 3.3V drive is not enough or its inconvenient to get 3.3V to the drive,
set the step and direction outputs into OPEN_DRAIN mode so you get a 5V swing
Eric, do this, and use the 5 Volts from pin 49 of P4 on the
Hi all,
I am running into a small problem with dropped / excess steps using the
m5i20 board and Hostmot2 driver. The problem appears to be with the 50 pin
cable connecting the m5i20 with the TB. The quick form of my question is,
are there any recommended cables / manufacturers of cables to use
Eric H. Johnson wrote:
Hi all,
I am running into a small problem with dropped / excess steps using the
m5i20 board and Hostmot2 driver. The problem appears to be with the 50 pin
cable connecting the m5i20 with the TB. The quick form of my question is,
are there any recommended cables /
Eric H. Johnson wrote:
I am running into a small problem with dropped / excess steps using the
m5i20 board and Hostmot2 driver. The problem appears to be with the 50 pin
cable connecting the m5i20 with the TB. The quick form of my question is,
are there any recommended cables / manufacturers
-users] Cable recommendations for Mesa boards
Hi all,
I am running into a small problem with dropped / excess steps using the
m5i20 board and Hostmot2 driver. The problem appears to be with the 50 pin
cable connecting the m5i20 with the TB. The quick form of my question is,
are there any
John, Sebastian and Peter,
Here is a combined reply, using John's post as the basis.
What kind of stepper drives? In particular, I'm asking about the inputs.
Optocouplers, or non-isolated? Do they have any filtering?
I am using an IM483 micro-stepping driver, the manual can be found here:
