@Eli Grobin: Yaskawa is here defining "pitch" as rev/inch, instead of the (much more common) inch/rev or mm/rev. With this definition, a higher "pitch" does give you a finer thread ball screw. Their definition of pitch was confusing for me also. At 2:28, I was expecting to see the pitch term P in the numerator.
It is possible that he is referring to ball screw lead instead of pitch. The friction torque units appear correct in LBFF-in. Here is more information on lead versus pitch. hwww.thomsonlinear.com/en/support/tips/what-is-the-difference-between-pitch-and-lead-when-referring-to-a-screw#:~:text=for%20e%2Dcommerce.-,What%20is%20the%20difference%20between%20pitch%20and%20lead%20when%20referring,ball%20screws%20are%20typically%20specified.
The tm is the time required to complete the motion profile, excluding the dwell time. In the example from the catalog, it is labeled as feeding time. Here is a link from our Yaskawa Solution Center: solutioncenter.yaskawa.com/selfservice/viewdocument.do?noCount=true&externalId=DMSD-MotionProductEngineering-YEA-KAEPS80000042-YEA-KAEPS80000042Kpdf&sliceId=pdfPage_393&noCount=true&isLoadPublishedVer=&docType=kc&docTypeID=DT_MARKETINGDOCUMENTS_1&stateId=2830&cmd=displayKC&dialogID=147806&ViewedDocsListHelper=com.kanisa.apps.common.BaseViewedDocsListHelperImpl&openedFromSearchResults=true
When you reference the change in pitch around 6:50, what are the units of pitch? Your example references a larger pitch but then shows a finer thread ball screw, and this confuses me. I would think going from pitch of 1.5 mm to pitch of 1.0 mm would decrease the effect of the linear components inertia on the total inertia.
Thanks for watching our video on "Servo Motor Sizing Basics Part2 - Technical " We recommend contacting our Technical Support with your application information at www.yaskawa.com/support-training/support, or you can also reach out to your local Yaskawa Service Provider - www.yaskawa-global.com/company/profile/global
It is all about unit conversion. US Customary Units are implied in this case. Gravitational acceleration is included at 6:30 to convert weight to mass. At 8:17, to be consistent, the assumed units are also weight per cubic volume (for example lb/ft^3). We might have made this more clear by expressing the term as ρ/g. Hope this helps.
Excellent video speaking as someone who has never used a servo motor before
@Eli Grobin: Yaskawa is here defining "pitch" as rev/inch, instead of the (much more common) inch/rev or mm/rev. With this definition, a higher "pitch" does give you a finer thread ball screw. Their definition of pitch was confusing for me also. At 2:28, I was expecting to see the pitch term P in the numerator.
It is possible that he is referring to ball screw lead instead of pitch. The friction torque units appear correct in LBFF-in. Here is more information on lead versus pitch.
hwww.thomsonlinear.com/en/support/tips/what-is-the-difference-between-pitch-and-lead-when-referring-to-a-screw#:~:text=for%20e%2Dcommerce.-,What%20is%20the%20difference%20between%20pitch%20and%20lead%20when%20referring,ball%20screws%20are%20typically%20specified.
Thanks for your voluntary to teaching
Thank you my friend its very useful for a machine designers and please upload the more videos like this
누락된 주요 내용 2가지.
1. 볼스크류의 효율 : 리드각, 마찰각 적용
2. 볼스크류 볼피치원에대한 토크차이
Very clear and useful. Thank you very much.
Topz excellent learnt alot
Please do a tuning and set up video on rack and pinion gantry load tuning with 2 motors for y axis
👍🙂very nice
thanks for the insightful sharing
I didn't see "t (sub m)" defined in Motion profile! What is this variable?
The tm is the time required to complete the motion profile, excluding the dwell time. In the example from the catalog, it is labeled as feeding time. Here is a link from our Yaskawa Solution Center: solutioncenter.yaskawa.com/selfservice/viewdocument.do?noCount=true&externalId=DMSD-MotionProductEngineering-YEA-KAEPS80000042-YEA-KAEPS80000042Kpdf&sliceId=pdfPage_393&noCount=true&isLoadPublishedVer=&docType=kc&docTypeID=DT_MARKETINGDOCUMENTS_1&stateId=2830&cmd=displayKC&dialogID=147806&ViewedDocsListHelper=com.kanisa.apps.common.BaseViewedDocsListHelperImpl&openedFromSearchResults=true
When you reference the change in pitch around 6:50, what are the units of pitch? Your example references a larger pitch but then shows a finer thread ball screw, and this confuses me. I would think going from pitch of 1.5 mm to pitch of 1.0 mm would decrease the effect of the linear components inertia on the total inertia.
Thanks for watching our video on "Servo Motor Sizing Basics Part2 - Technical " We recommend contacting our Technical Support with your application information at www.yaskawa.com/support-training/support, or you can also reach out to your local Yaskawa Service Provider - www.yaskawa-global.com/company/profile/global
Thanks
Excuse me Sir, why is the gravitational acceleration included in the rotational inertia equation? min 8:17
It is all about unit conversion. US Customary Units are implied in this case. Gravitational acceleration is included at 6:30 to convert weight to mass. At 8:17, to be consistent, the assumed units are also weight per cubic volume (for example lb/ft^3). We might have made this more clear by expressing the term as ρ/g. Hope this helps.
Thank you
thank you
Can you post this video in hindi ?
Use auto translate for the CC option..
khi khi khi