Title: Need accelerations lower than 9.0 mm/s^2 [Print This Page] Author: math_indy Time: 2018-9-15 06:00 Title: Need accelerations lower than 9.0 mm/s^2 I have DDCSV2.1 installed on a surface grinder. The Z-axis takes 40 turns per inch (= 1.6 turns per mm).
Because of this I need acceleration parameter that is less than 9.0 mm/s^2.
Is there any way to turn acceleration and deceleration parameters to anything less than 9.0 mm/s^2?
Author: math_indy Time: 2018-9-18 04:50
OK, so the work around that I am thinking about trying might solve this issue. Here is it:
I am thinking about leaving my DDCSV2.1 in metric (mm) mode (parameter #115) and, instead, scaling the pulse equivalent axis parameters (#34,#35,& #36) by a factor of 25.4. In this way the displays will be calibrated in inches but I will have 25.4X finer control of the acceleration parameters that are causing my trouble. This work-around might also fix the G-Code feed rate issue (mentioned in other threads) as all G-Code motion AND feed-rate will be scaled up to inches by the 25.4 scale factor. The only drawback of this work-around is the DDCSV2.1 display will still say "mm"--a large sticker indicating that readings are in inches will be my solution for that.Author: Will_D Time: 2018-9-18 17:09
Are you confident enough to edit a system file?
If so you need to edit the eng file to change the min value of #99
If so you need to edit the eng file to change the m ...
I edited the eng file as you suggest and this fixed this acceleration issue for me---THANK YOU!!!
In addition to parameter #99 I also lowered the minimum allowed accelerations in the eng file for z-axis parameters #47 and #265 as I think parameter #99 is for circle motion--no?
It is nice to know how to edit those files--would be nice also if I could make a parameter file that would re-load when ever I re-flash the software revision (rather than typing over defaults manually)
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