× Forum Header

AXIS CONFIGURATION Question

More
12 Mar 2019 23:25 #128472 by sandman92k
I hope i ask this correctly.... I am using KL5056 D Stepper drivers, the drivers dip switch are set at 4 micro steps and 800 steps/rev..

But as i try to configure linuxcnc for my current set up, the settings i want in linuxcnc should be
200 Motor Steps Per Revolution
2 Driver Microstepping..

Do i need to change the driver steppers dip switch to the settings i want in linuxcnc so they both match??

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

More
13 Mar 2019 00:11 #128473 by andypugh
I would set LinuxCNC to suit the drivers.

If you have different microstep ratios in the driver and in LinuxCNC then your axes will move twice as far (or half as far) as they should.

It's fairly easy to work out if that is the case, it isn't a subtle error.

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

More
13 Mar 2019 00:13 #128474 by sandman92k
so the drivers and linuxcnc should be the same settings,

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

More
13 Mar 2019 00:43 #128475 by tommylight

sandman92k wrote: so the drivers and linuxcnc should be the same settings,

Yes.

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

More
13 Mar 2019 12:02 #128503 by pl7i92
Replied by pl7i92 on topic AXIS CONFIGURATION Question
in genral Linuxcnc works on SCALE so it is the Number of steps per Unit
meaning steps/mm or steps/inch
THIS is PRINTED almost at the bottom of the Stepconfwizard
so you can controll this as you caculate your Hardware and softwarestepping

THE wizards calculate also for you but only to check

200Steps/Motor 4Microsteps -> 800steps/rev

pitch Ballscrew 2005/1605 -> 5mm
so you got 800/5 -> SCALE 160Steps/mm

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

More
13 Mar 2019 14:12 #128517 by sandman92k
I really appreciate all the help i get from all on this site, its always been a great resource for me...

some of this I just do not understand and i apologize for that...When I read the manual it does not help me all the time, but i always try it first...

In my case do the step drivers dip pin need to be changed or does the linuxcnc only allow what you put in the config...
example, my step driver are set at 4 micor steps and 800 steps/rev..

but in linuxcnc in the config i input 200 microstep and 2 microstepping...
does linuxcnc only allow the 200/2 or do the mix match of numbers cause issues at the table,

thanks for the help in advance,

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

More
13 Mar 2019 14:29 #128520 by andypugh
It's been a long time since I set up a stepper machine, but I am pretty sure you can put any microstep ratio you want in the Stepconf setup wizard.

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

More
13 Mar 2019 15:31 #128527 by tommylight

sandman92k wrote: but in linuxcnc in the config i input 200 microstep and 2 microstepping...
does linuxcnc only allow the 200/2 or do the mix match of numbers cause issues at the table,


That is wrong, you need to set the microstepping the same as in your drives, so 4.
Linuxcnc allows any numbers there, but it is easier for you to understand if you stick with the normal values like
motor 200 step/rev
microstepping 4
pulley/teeth 1 and 1 if you have direct drive ballscrews
and 5mm if you are using the usual 1605 or 2005 screws.
You can also manually edit the ini file and enter 160 for scale. You get the same result as PL7i92 pointed out.

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

More
13 Mar 2019 16:07 #128534 by pl7i92
Replied by pl7i92 on topic AXIS CONFIGURATION Question
@sandman
can you tell us your hardware bihind the STEPPER
Timingbelt direct tread pitch
gearing
so we can get more into your required setup
it is mutch easyer then you think

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

More
13 Mar 2019 19:44 #128540 by sandman92k
using 1.8 Degree high torque 280 ox motors.

X drive is acme lead screw 8mm from open builds parts store
Y drive is a dual drive using two motors and on a acme lead screw 8mm from Open builds store

z axis acme lead screw 8mm

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

Time to create page: 0.109 seconds
Powered by Kunena Forum