# Ramp down speed for turtable

**URL:** <https://tech-community.robotics.abb.com/t/ramp-down-speed-for-turtable/8484>\
**Category:** RAPID Programming\
**Created:** [September 26, 2018, 8:42pm UTC](https://tech-community.robotics.abb.com/t/ramp-down-speed-for-turtable/8484 "2018-09-26T20:42:24Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![gregf](https://avatars.discourse-cdn.com/v4/letter/g/94ad74/32.png) [@gregf](https://tech-community.robotics.abb.com/u/gregf)\
**Post date:** [September 26, 2018, 8:42pm UTC](https://tech-community.robotics.abb.com/t/ramp-down-speed-for-turtable/8484/1 "2018-09-26T20:42:24Z")

</div>

Hello all,  
I have a robot controlling an external axis which is a turntable.  
We can manage the continuous rotation speed ramp up with the IndCmove function and \Ramp. However it seems to only modify the increase of speed, for example from 20 rpm to 50 rpm. If I want to change the decrease of speed, for example in some cases I want to go from 50 rpm down to 20 rpm in 10 sec and for another case in 30 sec, nothing changes if I change \Ramp.  
It looks like Ramp only has an impact when we increase the turntable speed.  
Any idea why?

Thanks

---

<div class="post-metadata">

**Author:** ![lemster68](https://dub1.discourse-cdn.com/flex005/user_avatar/tech-community.robotics.abb.com/lemster68/32/1945_2.png) [@lemster68](https://tech-community.robotics.abb.com/u/lemster68)\
**Post date:** [September 27, 2018, 1:05pm UTC](https://tech-community.robotics.abb.com/t/ramp-down-speed-for-turtable/8484/2 "2018-09-27T13:05:49Z")

</div>

Ramp will DECREASE the deceleration, as well as acceleration. Maybe omit Ramp on the slowing down, or play with the values. As far as I know, there is no dynamic braking involved. Our tables take quite a while to slow down from high speed, I suppose from the inertia.