Questions re Plasmac
- Clive S
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Q2. In the ini file re.
[AXIS_Z]
# set to double the value in the corresponding joint
MAX_VELOCITY = 175 Do you mean set this to double
# set to double the value in the corresponding joint
MAX_ACCELERATION = 1500
[JOINT_1]
AXIS = Z
MAX_VELOCITY = 175 or this
MAX_ACCELERATION = 1500
STEPGEN_MAX_VEL = 200 or this
STEPGEN_MAX_ACC = 2500
As a lot of general ini files have this in it
# The values below should be 25% larger than MAX_VELOCITY and MAX_ACCELERATION
STEPGEN_MAXVEL = 250
STEPGEN_MAXACCEL = 1875
So I am a bit confused !
Q3. I am getting an error message on startup. This bit might be better in the general forum
hm2/hm2_7i96.0: stepgen.01.maxvel is too big for current step timings & position-scale clipping to max possible
SCALE = -800
DIRSETUP = 2500
DIRHOLD = 2500
STEPLEN = 3500
STEPSPACE = 3500
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- PCW
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hm2/hm2_7i96.0: stepgen.01.maxvel is too big for current step timings & position-scale clipping to max possible
STEPGEN_MAX_VEL = 200
...
SCALE = -800
DIRSETUP = 2500
DIRHOLD = 2500
STEPLEN = 3500
STEPSPACE = 3500
The warning is saying that a maximum velocity of 200 mm/s and a scale of -800
would requite a step rate of 160 KHz (200*800) but the maximum possible step rate
with your step length and step space settings is lower than this ( 1/(3500ns +3500ns) = ~143 KHz)
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- Clive S
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The warning is saying that a maximum velocity of 200 mm/s and a scale of -800
would requite a step rate of 160 KHz (200*800) but the maximum possible step rate
with your step length and step space settings is lower than this ( 1/(3500ns +3500ns) = ~143 KHz)
Ah light bulb moment so I need to reduce the step length and spacing 2000ns as a min. ~250KHz This is using a 7i96
Thanks yet again Peter
edit wrongly calculated math
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- PCW
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(312.5 mm/sec) and a axis/joint max velocity of 250 mm/sec
(assuming your drives can do that)
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- phillc54
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If you are using Axis then you could reduce the font size in the ini file.Q1. Is it possible to reduce the width of the screen by about 15mm. I have to move the screen over the click the max button to fill the screen to the correct size.
# the font for the Axis GUI, if not specified 'sans 10' will be used
# valid font sizes are from 9 to 15
FONT = sans 11EDIT: I forgot to mention that if you use Axis and want it to start maximised then you can set that in the ini file as well:
# the window size for the Axis GUI, 0 = minimum size to suit font, 1 = maximized
MAXIMISED = 1It is referring to the first two with the identical name.Q2. In the ini file re.
[AXIS_Z]
# set to double the value in the corresponding joint
MAX_VELOCITY = 175 Do you mean set this to double
# set to double the value in the corresponding joint
MAX_ACCELERATION = 1500
[JOINT_1]
AXIS = Z
MAX_VELOCITY = 175 or this
MAX_ACCELERATION = 1500
STEPGEN_MAX_VEL = 200 or this
STEPGEN_MAX_ACC = 2500
As a lot of general ini files have this in it
# The values below should be 25% larger than MAX_VELOCITY and MAX_ACCELERATION
STEPGEN_MAXVEL = 250
STEPGEN_MAXACCEL = 1875
So I am a bit confused !
Here are the second two from the docs (note that these are only used if you are using steppers):
STEPGEN_MAXVEL = 21.0 - Acceleration limit for the step generator. This should be 1% to 10% larger than the joint MAX_ACCELERATION. This value improves the tuning of stepgen’s "position loop". If you have added backlash compensation to an joint then this should be 1.5 to 2 times greater than MAX_ACCELERATION.
STEPGEN_MAXVEL = 1.4 - Older configuration files have a velocity limit for the step generator as well. If specified, it should also be 1% to 10% larger than the joint MAX_VELOCITY. Subsequent testing has shown that use of STEPGEN_MAXVEL does not improve the tuning of stepgen’s position loop.Please Log in or Create an account to join the conversation.