Tuning question, stepper motor mill

I have my dirhold and dirsetup at 60000. I inflated my max jitter numbers initially.

Velocity was set at 2 in per sec and it stalled out so I dropped it to 1.75 and it runs but sounds like it may be missing a couple steps. On wheezy it's fine but I'm testing out stretch. The jitters is around 20k for both on stretch

I could increase voltage (40v Currently) on the nema 23 motors also

I would be happy with 100 ipm max velocity.


May get a mesa card but want to try and tweak this first.

can you tell Here what Board are you using
100ipm on a parporrt is quite easy
that is 40mm/sec

and 40 VEL and 250 ACC is a Standard that can be done by a simple TB6560 at 100000 latency

It's a sainsmart breakout board with gecko 201s

These are the hal values

setp stepgen.0.steplen 1
setp stepgen.0.stepspace 0
setp stepgen.0.dirhold 60000
setp stepgen.0.dirsetup 60000

is it the one i use
here is my channel

Leon82 wrote:

These are the hal values

setp stepgen.0.steplen 1
setp stepgen.0.stepspace 0
setp stepgen.0.dirhold 60000
setp stepgen.0.dirsetup 60000

There is one more pertinant thing needed from your hal file. From the above numbers you must be using the reset funtion of the parallel port to get a full step/ base-thread cycle. We need to see what that reset time is because it becomes your step length time. Look for a line like:
setp parport.0.reset-time ...

Todd wrote:

Leon82 wrote:

These are the hal values

setp stepgen.0.steplen 1
setp stepgen.0.stepspace 0
setp stepgen.0.dirhold 60000
setp stepgen.0.dirsetup 60000

There is one more pertinant thing needed from your hal file. From the above numbers you must be using the reset funtion of the parallel port to get a full step/ base-thread cycle. We need to see what that reset time is because it becomes your step length time. Look for a line like:
setp parport.0.reset-time ...

it's 5000

It's 5000 for the port reset

I set the reset to 35000 and it sounds good.

35000 is pretty long for a reset time, I would suggest not using a rest time longer than half your base-thread time. if you have trouble at that speed,either try inverting your step signal or don't use the reset feature.
The reason being the reset feature holds the real time system hostage for the amount of time it counts down and if your computer is twiddling it thumbs for more than half the time... you get the picture.