Forum Menu

7I90HD with Raspberry pi and getting weird joint 0 following errors

More
5 years 8 months ago #199847 by creisey
7I90HD with Raspberry pi and getting weird joint 0 following errors was created by creisey
Hi i have a question i have a XXYZ config

the attached one is working without the error, but the homing takes forever
Code:
[AXIS_X] MAX_VELOCITY = 200 MAX_ACCELERATION = 300 MIN_LIMIT = -9999.0 MAX_LIMIT = 9999.0 [JOINT_0] TYPE = LINEAR # Set Stepgen max 20% higher than the axis STEPGEN_MAXVEL = 250 STEPGEN_MAXACCEL = 375

as long as i have MAX_VELOCITY & MAX_ACCELERATION in the Joint section the homing is quick as usual but after some movements i run in a joint error. > check example below
Code:
[AXIS_X] MAX_VELOCITY = 200 MAX_ACCELERATION = 300 MIN_LIMIT = -9999.0 MAX_LIMIT = 9999.0 [attachment=35102]iosi.hal[/attachment] [attachment=35103]iosi.ini[/attachment] [JOINT_0] TYPE = LINEAR MAX_VELOCITY = 200 MAX_ACCELERATION = 300 # Set Stepgen max 20% higher than the axis STEPGEN_MAXVEL = 250 STEPGEN_MAXACCEL = 375

Please Log in or Create an account to join the conversation.

More
5 years 8 months ago #199848 by Aciera
Replied by Aciera on topic 7I90HD with Raspberry pi and getting weird joint 0 following errors
Note that your STEPGEN_MAXVEL is actually more than "20%" higher than the axis.
So maybe try reducing that bit.

Please Log in or Create an account to join the conversation.

More
5 years 8 months ago - 5 years 8 months ago #199850 by creisey
Replied by creisey on topic 7I90HD with Raspberry pi and getting weird joint 0 following errors
i tried that with 20% as well. same effect...
funny thing is there are examples with 20% and 25%

Code:
# The values below should be 25% larger than MAX_VELOCITY and MAX_ACCELERATION
Last edit: 5 years 8 months ago by creisey.

Please Log in or Create an account to join the conversation.

More
5 years 8 months ago #199852 by Clive S
Replied by Clive S on topic 7I90HD with Raspberry pi and getting weird joint 0 following errors
Re this:-

HOME = 0.000
HOME_OFFSET = 0.0
HOME_SEARCH_VEL = -10 This is the speed it will search for the home switch
HOME_LATCH_VEL = 2.5
HOME_USE_INDEX = NO
HOME_IGNORE_LIMITS = YES
HOME_SEQUENCE = 2 if you want gantry squaring this has to be a -ve number

# these are in nanoseconds
DIRSETUP = 2500
DIRHOLD = 2500
STEPLEN = 2500 might have to increase these
STEPSPACE = 2500

Please Log in or Create an account to join the conversation.

More
5 years 8 months ago #199856 by creisey
Replied by creisey on topic 7I90HD with Raspberry pi and getting weird joint 0 following errors

Clive S wrote: Re this:-

HOME = 0.000
HOME_OFFSET = 0.0
HOME_SEARCH_VEL = -10 This is the speed it will search for the home switch
HOME_LATCH_VEL = 2.5
HOME_USE_INDEX = NO
HOME_IGNORE_LIMITS = YES
HOME_SEQUENCE = 2 if you want gantry squaring this has to be a -ve number

# these are in nanoseconds
DIRSETUP = 2500
DIRHOLD = 2500
STEPLEN = 2500 might have to increase these
STEPSPACE = 2500


right those values are getting read while i set MAX_VELOCITY & MAX_ACCELERATION in the [JOINT_0] section, but if they are missing the search velocity is set to very slow value. after the slow homing process, jogging is working without the sudden following errors.

Please Log in or Create an account to join the conversation.

More
5 years 8 months ago #199857 by Aciera
Replied by Aciera on topic 7I90HD with Raspberry pi and getting weird joint 0 following errors
Have you tried reducing velocity and acceleration by say 50% ?

Please Log in or Create an account to join the conversation.

Time to create page: 0.063 seconds
Powered by Kunena Forum