What is the difference between ccpm and eccpm?
04-14-2006 | 08:47 AM
#2
My Feedback: (11)
RE: What is the difference between ccpm and eccpm?
There's mCCPM and eCCPM
mCCPM like the Raptor has one servo for each control, elevator, aileron, and collective pitch.
eCCPM uses 3 servos, arranged around the swash plate usually 120 degrees apart (though there are variations) that are directly connected to the swash plate and use software mixing to achieve the same results. For example with mCCPM the elevator servo rocks the swash plate fore and aft for elevator control. With eCCPM the front two servos would pull down and the back servo would push upwards acheiving the same swash plate movement. With mCCPM the collective pitch servo would move an arm to move the swash plate up and down, with eCCPM all three servos move up at the same time through radio mixing.
Advantages of eCCPM, less complicated linkages, usually 3 servos and 3 striaght pushrods. Faster response to collective inputs (in some but not all models), can use less torque servos since 3 servos are doing the work of one.
Disadvantages, more complicated to program, direct linkages lead to stripped servos in almost any crash no matter how minor, requires 3 matched servos, takes some tinkering to get all the control interaction canceled out.
mCCPM like the Raptor has one servo for each control, elevator, aileron, and collective pitch.
eCCPM uses 3 servos, arranged around the swash plate usually 120 degrees apart (though there are variations) that are directly connected to the swash plate and use software mixing to achieve the same results. For example with mCCPM the elevator servo rocks the swash plate fore and aft for elevator control. With eCCPM the front two servos would pull down and the back servo would push upwards acheiving the same swash plate movement. With mCCPM the collective pitch servo would move an arm to move the swash plate up and down, with eCCPM all three servos move up at the same time through radio mixing.
Advantages of eCCPM, less complicated linkages, usually 3 servos and 3 striaght pushrods. Faster response to collective inputs (in some but not all models), can use less torque servos since 3 servos are doing the work of one.
Disadvantages, more complicated to program, direct linkages lead to stripped servos in almost any crash no matter how minor, requires 3 matched servos, takes some tinkering to get all the control interaction canceled out.
04-14-2006 | 05:42 PM
#3
Senior Member
Joined: Sep 2005
Posts: 106
Likes: 0
Received 0 Likes
on
0 Posts
From: Hammonds Plains, NS, CANADA
RE: What is the difference between ccpm and eccpm?
So the honybee cp2 is eCCPM?
ORIGINAL: barracudahockey
There's mCCPM and eCCPM
mCCPM like the Raptor has one servo for each control, elevator, aileron, and collective pitch.
eCCPM uses 3 servos, arranged around the swash plate usually 120 degrees apart (though there are variations) that are directly connected to the swash plate and use software mixing to achieve the same results. For example with mCCPM the elevator servo rocks the swash plate fore and aft for elevator control. With eCCPM the front two servos would pull down and the back servo would push upwards acheiving the same swash plate movement. With mCCPM the collective pitch servo would move an arm to move the swash plate up and down, with eCCPM all three servos move up at the same time through radio mixing.
Advantages of eCCPM, less complicated linkages, usually 3 servos and 3 striaght pushrods. Faster response to collective inputs (in some but not all models), can use less torque servos since 3 servos are doing the work of one.
Disadvantages, more complicated to program, direct linkages lead to stripped servos in almost any crash no matter how minor, requires 3 matched servos, takes some tinkering to get all the control interaction canceled out.
There's mCCPM and eCCPM
mCCPM like the Raptor has one servo for each control, elevator, aileron, and collective pitch.
eCCPM uses 3 servos, arranged around the swash plate usually 120 degrees apart (though there are variations) that are directly connected to the swash plate and use software mixing to achieve the same results. For example with mCCPM the elevator servo rocks the swash plate fore and aft for elevator control. With eCCPM the front two servos would pull down and the back servo would push upwards acheiving the same swash plate movement. With mCCPM the collective pitch servo would move an arm to move the swash plate up and down, with eCCPM all three servos move up at the same time through radio mixing.
Advantages of eCCPM, less complicated linkages, usually 3 servos and 3 striaght pushrods. Faster response to collective inputs (in some but not all models), can use less torque servos since 3 servos are doing the work of one.
Disadvantages, more complicated to program, direct linkages lead to stripped servos in almost any crash no matter how minor, requires 3 matched servos, takes some tinkering to get all the control interaction canceled out.
04-15-2006 | 06:54 AM
#5
Senior Member
Joined: Oct 2002
Posts: 1,415
Likes: 0
Received 0 Likes
on
0 Posts
From: Town Creek,
AL
RE: What is the difference between ccpm and eccpm?
manu2005:: ... So the honybee cp2 is eCCPM? ...
Whether the e-mixing occurs in the TX or the 4n1 onboard mixer ... I can't tell.
Some lower end TXs are eCCPM designed to mix for the heli it's sold with ... ie ... mixing is done in the TX.
Some lower end TXs are mCCPM where the onboard mixer does the translation to eCCPM.
Either way, the final result at the swash is it needs some sort of eCCPM before the signals get to the servos.
Good Luck,
d.tipton
06-30-2013 | 08:43 PM
#6
Member
Joined: Mar 2013
Posts: 69
Likes: 0
Received 0 Likes
on
0 Posts
From: , MA
RE: What is the difference between ccpm and eccpm?
<font face="Arial, Helvetica, sans-serif" size="3">CCPM = collective cyclic pitch mixing. eCCPM = electronic collective cyclic pitch mixing. All collective pitch helis have either mechanical or electronic mixing. Unfortunately a lot of guys use the terms CCPM and eCCPM interchangeably when what they are really talking about is electronic mixing. It would be less confusing if everyone would use the term CCPM to describe only mechanical mixing.</font>
07-01-2013 | 03:49 AM
#7
My Feedback: (11)
RE: What is the difference between ccpm and eccpm?
All collective pitch helis have either mechanical or electronic mixing
Several helis have had the collective driven from a collar or a shaft within the main shaft to isolate the collective pitch from the cyclic.
