Rapid moves

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6 years 4 months ago #170763 by bbsr_5a
Replied by bbsr_5a on topic Rapid moves
stepper RPM are limited on Voltige
12V around 160RPM
24V 220Rpm
and 36V MAX for Nema17 around 360RPM

but you shoudt increase your timing then the following error will disapear

can you upload the INI and HAL to get a look

BASE shoudt be set to 100k in INI on parport use
WHAT drivers are you using

you woudt benefitt some from the master as the interpreter is rewritten and gives you a better timing

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6 years 4 months ago #170847 by Andy123
Replied by Andy123 on topic Rapid moves
Thank you for your comments:
If steppers are limited to 360 rpm, then all my efforts to run at 1000 RPM are pointless. I am surprised that I was able to get them running that high anyway.

but you shoudt increase your timing then the following error will disapear

I am not getting Following Errors, I have mentioned that I had these earlier, but this was resolved already, my issue is stall with buzzing noise at high speed.

BASE shoudt be set to 100k in INI on parport use

I disagree with this: period should be shorter than 1/(1280 * 20) sec or 39063ns. I am running at 30000
.

WHAT drivers are you using

currently I am testing with TB6600, but I tried few other drivers.
Results are all the same.

At this point I think I am all set, I will leave it as-is and may be replace screws with 8mm lead later on.

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6 years 4 months ago #170849 by tommylight
Replied by tommylight on topic Rapid moves

Andy123 wrote: If steppers are limited to 360 rpm,

They are not limited at that random value.
The stepper speed is dictated by the inductance, voltage and current, inertia, etc.
There is no value that they are limited to, there is just a limit of what usable RPM can be achieved with a given setup, usable, not maximum, as you can spin them at 3000RPM but they will stall if you just look at them. :)
Good torque is usually up to 200RPM, usable torque up to 400 or 500RPM, anything above can be used only for rapids where the load on the motors does not change. This is for orientation only as a rough estimate.

Andy123 wrote:

BASE shoudt be set to 100k in INI on parport use

I disagree with this: period should be shorter than 1/(1280 * 20) sec or 39063ns. I am running at 30000

First, 100K is preferred due to PC latency to start with, it can be lowered by a lot on a good PC, not a fast PC, but a good latency PC.
Second, where did that formula come from, as it is useless for anything latency related.
If you are getting no latency warnings at 30000, do not worry about it, leave it as is.

Andy123 wrote: At this point I think I am all set, I will leave it as-is and may be replace screws with 8mm lead later on.

That is the best option.

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