I have a 1/6 SM Hawk using a 18MZ.

The gear and doors are on one BVM valve using one servo. I have had to use the slow servo function to give the doors enough time to close since the landing gear is so slow on retracting.

My question is:

Is there a way to have a mix where the servo will initially travel a certain distance at normal speed then at a particular point travel the remaining distance at a slow speed.

Don

unless im reading wrong..... there is no way to do it (?)

you have a single BVM valve with doors and gear hooked to the same ports? i.e. doors and gear opens, doors and gear closes from same ports on the BVM valve??
I surely must be reading that wrong...?

Yes.

Go to you P mix screen. Select offset feature.

Use line 1 and 2 for your gear function.

Put in your first offset point on line 1 and your second offset point in line 2.

Now put a delay on the "in" of line 2 and a delay on the "out" of line one.

This will allow the gear to move to the first point immediatley, then have the delay before moving the remainder. Same for when you turn of the mix, it will delay the opposite way.

Looks like this

Thanks!

Exactly what I was looking for.

i would like to ask again..... you have doors and retracts running off the same single BVM valve? no other valving?

In thinking about this.
More for those that do not have the channels or programing available, you could use a check valve and an orifice to make the doors open fast and close slow, and the gear close fast and open slow. It would actually need 4 valves and 4 orifices. This way you could have just one servo and one standard retract valve to control both doors and gear.

there are also delays you can use with mixes .. where for example a mix wont activate for a number of seconds after the primary function is initiated. Takes some playing around as its not documented in the best way, but its possible. I have used this feture for gear sequencing off of my 18mz before



~V~

I with Kirk on this one. The OP is using ONE servo and ONE valve.

Maybe using a bvm retract valve and using the same servo to activate a bvm button valve for doors?
I've seen this set up before quite ingenious..I'd rather just use a UP valve though.

It's one BVM valve operated by one servo. I forgot to add the the opposite servo horn also actuates a BVM button valve which closes and opens the doors. but for my programing question the whole set up is done using only one servo.

it is the top servo in the pic.

that sounds better
i use that method all the time. works great.

Yea that's what I thought that's a neat set up just takes some tinkering to get it right