Re: [CAD_CAM_EDM_DRO] Servo Tuning Troubles
Posted by
R Rogers
on 2006-05-19 11:23:57 UTC
I'd guess it's noise.
Move the encoder wiring away from the motor leads.
Use shielded cable on the encoder wiring and ground the shield on the controller end only.
Hope this helps, Ron
novacustard <rt@...> wrote:
Hi.
I have built a nice DIY CNC router with much help from ebay.
However, I have run into trouble with the servo tuning stage, to the
point at which I have just ripped a metal flexicoupling in half :(
While tuning the X axis, I have seen the commanded move of approx 50mm
take place ok, then the servo threw itself into reverse at max speed
for a seemingly random distance. This ultimately saw it charge through
the limit switches and rip the coupling in half.
The Y axis seems unable to move at all, each time flagging 'Position
Error Exceeded'.
The only axis that is behaving is the Z axis.
Sorry if this is a bit long, but any suggestions would be gratefully
received.
Many thanks,
Richard
email me at novacustard@here
where h e r e can be replaced by yahooDOTcoD O Tuk
Servos, drives, controller and software are all Parker/Compumotor,
Controller is a Parker 6K4, all connecttions are by ribbon cable or
power cable where necesary. (Not shielded).
X axis is an SE230AE with 10:1 gearhead and OEM770T drive with 75vdc
p/s and THK44 Linear Actuator with 1 rev to 20mm leadscrew and 500mm
travel.
Y axis is an SE230AE with 10:1 gearhead and OEM770T drive with 75vdc
p/s and THK33 Linear Actuator with 1 rev to 10mm leadscrew and 200mm
travel.
Z axis is an SE232BE direct coupled to unknown Linear Actuator with 10
rev to 25.4mm leadscrew and 200mm travel. OEM770T drive with 24vdc supply.
Addresses:
FAQ: http://www.ktmarketing.com/faq.html
FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@..., timg@...
Moderator: pentam@... indigo_red@... davemucha@... [Moderators]
URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
OFF Topic POSTS: General Machining
If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble.
http://www.metalworking.com/news_servers.html
http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list.
NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
bill
List Mom
List Owner
Yahoo! Groups Links
[Non-text portions of this message have been removed]
Move the encoder wiring away from the motor leads.
Use shielded cable on the encoder wiring and ground the shield on the controller end only.
Hope this helps, Ron
novacustard <rt@...> wrote:
Hi.
I have built a nice DIY CNC router with much help from ebay.
However, I have run into trouble with the servo tuning stage, to the
point at which I have just ripped a metal flexicoupling in half :(
While tuning the X axis, I have seen the commanded move of approx 50mm
take place ok, then the servo threw itself into reverse at max speed
for a seemingly random distance. This ultimately saw it charge through
the limit switches and rip the coupling in half.
The Y axis seems unable to move at all, each time flagging 'Position
Error Exceeded'.
The only axis that is behaving is the Z axis.
Sorry if this is a bit long, but any suggestions would be gratefully
received.
Many thanks,
Richard
email me at novacustard@here
where h e r e can be replaced by yahooDOTcoD O Tuk
Servos, drives, controller and software are all Parker/Compumotor,
Controller is a Parker 6K4, all connecttions are by ribbon cable or
power cable where necesary. (Not shielded).
X axis is an SE230AE with 10:1 gearhead and OEM770T drive with 75vdc
p/s and THK44 Linear Actuator with 1 rev to 20mm leadscrew and 500mm
travel.
Y axis is an SE230AE with 10:1 gearhead and OEM770T drive with 75vdc
p/s and THK33 Linear Actuator with 1 rev to 10mm leadscrew and 200mm
travel.
Z axis is an SE232BE direct coupled to unknown Linear Actuator with 10
rev to 25.4mm leadscrew and 200mm travel. OEM770T drive with 24vdc supply.
Addresses:
FAQ: http://www.ktmarketing.com/faq.html
FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@..., timg@...
Moderator: pentam@... indigo_red@... davemucha@... [Moderators]
URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
OFF Topic POSTS: General Machining
If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble.
http://www.metalworking.com/news_servers.html
http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list.
NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
bill
List Mom
List Owner
Yahoo! Groups Links
[Non-text portions of this message have been removed]
Discussion Thread
novacustard
2006-05-19 10:17:31 UTC
Servo Tuning Troubles
R Rogers
2006-05-19 11:23:57 UTC
Re: [CAD_CAM_EDM_DRO] Servo Tuning Troubles