u/grummaster

Not sure why we can not post pics into an existing post in this group. So, I posted a new post to answer my solution.

Someone asked about the best Deck Support. I always build a door mounted system out of aluminum tubing as you do not need to carry anything but a strap and it self adjusts to the ground.

When collapsed to the door

Prior to lowering the door

Legs when down

A ratchet strap is used to pull the two legs toward each other. It always automatically levels to the grade you are parked on.

The real secret to fast deployment is to use 1/8" Dyneema Rope on each side, right next to the steel cables, that are SET to exactly 90 degrees from the rear of the trailer. This way, when you park your trailer and level it, the ramp door is automatically level as well. No need to drag your level out, no need to adjust anything.

You swing down the legs, pull the strap across and put a little tension on it. Done. No wobbles. The 1/8" Dyneema can handle something like 1600lbs, so you can walk on it without the legs if you have good attachment points. On the end of the bottom end of the Dyneema, I have "S" hooks. I can unhook and drop the door completely if I want.

I've built a few of these on builds out of what ever aluminum I have laying around. The first one was made out of the adjustable slide arms of an old RV awning.

To use a G or M code in a job to alter acceleration settings ? I can not say I have ever come across this. Why are controls limiting use to a rigid setting instead of being as fluid as a feed rate change for example ?

Now, maybe I am behind the curve and it is out there. But, If this does not exist, does anyone have any idea why acceleration/ramping couldn't be altered by code ?

WHO would be best to properly answer this ? LinuxCCNC forum ? Maybe Bart Dring ?

I know I have wondered about this many years ago. I do have a CNC control that I can put in feed hold, change the acceleration and resume the job, which does not exactly automate anything, but it makes me think it might be possible.

We tend to have one general adjustment when it comes to accel/ramping... We can make things crazy tight all the time, or perhaps loose all the time. If you want to run a tight fast machine, but then have even one really tight direction change with a really, really small bit, there is a good chance you break the bit.

Just changing the feed rate mid line as we approach a tight corner will tend to leave a witness mark, but an Acceleration/Ramp change, maybe at the start of a challenging line of code would be much better.

Today, we have all these advanced tool path generation methods, as well as all the development of a lot of now rather inexpensive CNC Controls. Sure would be sweet to see a Cam program with a direction degree change setting that would put in a specific G or M code prior to any corner that matches the setting, and the CNC control that honors the code with a change in Acceleration into and out of a specific corner.

A guy can still dream, right ?