Plasma Torch Height Control
18 May 2013 02:26 #34270
by mariusl
Regards
Marius
www.bluearccnc.com
Replied by mariusl on topic Plasma Torch Height Control
John
I will test it over the weekend. Thanks for your help so far.
I will test it over the weekend. Thanks for your help so far.
Regards
Marius
www.bluearccnc.com
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19 May 2013 07:07 #34365
by andypugh
That sounds like it might be very low accel settings in the INI/hal
It might even be that the axis settings are OK, but the _stepgen_ accel is too low.
A more obscure possibility is that you are using a non-trivial kinematics, like Gantrykins, and there is an INI file parameter (DEFAULT_ACELLERATION) missing.
Replied by andypugh on topic Plasma Torch Height Control
When I say sluggish I mean that when I jog the axis in continuous mode, the z will continue to move long after I stopped jogging.
That sounds like it might be very low accel settings in the INI/hal
It might even be that the axis settings are OK, but the _stepgen_ accel is too low.
A more obscure possibility is that you are using a non-trivial kinematics, like Gantrykins, and there is an INI file parameter (DEFAULT_ACELLERATION) missing.
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19 May 2013 12:38 #34374
by mariusl
Regards
Marius
www.bluearccnc.com
Replied by mariusl on topic Plasma Torch Height Control
Andy,
I am using Trivkins and the DEFAULT_ACCELERATION is set as far as I remember.
What is the rule of thumb for the stepgen acceleration setting. I have the stepgen set at 8200 if the axis acceleration is set at 8000. Is there a more scientific way of making sure that the setting is correct.
I am using Trivkins and the DEFAULT_ACCELERATION is set as far as I remember.
What is the rule of thumb for the stepgen acceleration setting. I have the stepgen set at 8200 if the axis acceleration is set at 8000. Is there a more scientific way of making sure that the setting is correct.
Regards
Marius
www.bluearccnc.com
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19 May 2013 17:59 #34384
by BigJohnT
Replied by BigJohnT on topic Plasma Torch Height Control
I've found that acceleration is usually 10-20 times higher than max speed.
JT
JT
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