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02-20-2017, 02:07 AM | #1 (permalink) |
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Join Date: Sep 2013
Location: California, forest falls
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Help with setup
I'm dealing with a used gyro purchased from a Rcgroups member. In the setup menu selection "I" servo direction (as pertains to the pitch and all servos working in unison) the port labeled aux1 is giving no output for pitch. I've switched wires to the other side and still nothing on the throttle/ pitch stick for that one wire. It does however move all servos when I move the direction stick. The case on this gyro is beaten up a Lil and I'm wondering if this guy is trying to sell me junk?
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02-20-2017, 05:55 AM | #2 (permalink) |
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Join Date: Nov 2009
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It's not junk, it's setup wrong. Aux1? All the servos go to ch 1-4 sockets
You didn't mention what RX setup your using, you didn't mention any problems at G trim, you got to have it wired with a RX/sat and have the pit/gyro/rudder wires wrong. Did they move during the trim setup g? Start up a new model? normal 1 servo for swash type? What manual are you using, ver3 and 4 are different , got to use the right one.
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02-20-2017, 06:25 AM | #3 (permalink) |
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Join Date: Feb 2015
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Get a manual, read it and watch YouTube videos on BX setup as well. Should do all that before you even buy a unit, let alone try programming it.
Plugging things into random ports with no clue is a great way to smoke your fbl unit, then you'll really think he sold you junk when it was actually fine until you turned it into a piece of junk.
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Mini Protos 6s stretch/XK K110/Trex 450sport v2 fbl/Rochobby Nemesis NXT/RareBear funfighter620mm ~Problem Child~ |
02-20-2017, 09:00 AM | #4 (permalink) |
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Thread Starter
Join Date: Sep 2013
Location: California, forest falls
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Got it
I'm using three different versions of the manual. I have paper, my laptop and online video. I have done a factory reset. There is no Rx needed with the ar7200bx even though it's not recommended with a 450 size bird in running a sat. The ports are labeled alie, elec rudd and aux1. Aux1 is pitch or the opposite side alie. When using directional stick I have movement on the servo connected to the aux1 port but in setting "I" (coordinating servo movement for pitch control) I move the throttle /pitch stick and get no movement from the afore mentioned servo. I tried switching to the servo on the other side to that port and still no movement. I'm wondering if the pulse width or hertz for my servos is wrong? I have them set to factory default because I can't find specs for the alpha power a48hv hv servos I have in the Lil lady. Again, I get movement on all servos when applying directional stick but no movement from that port on the gyro when applying pitch and I've tried both servos.
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02-20-2017, 10:56 AM | #5 (permalink) |
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Hi,
when you can control the servo with the other functions I don't think there is some issue with wrong frequency or some hardware related problem. Check the swash type setup at menu point H, maybe you've set it to 90 deg ccpm!? And check your transmitter setup. Do you get collective output on Aux1 in the servo monitor? Have you set the correct stick mode? Do you use any curves or flight modes that may lock your collective control?
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02-20-2017, 10:57 AM | #6 (permalink) |
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Join Date: Nov 2009
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Know we know it's a AR7200, what TX?
alpha power a48hv hv servos Dead band: 0.8μs default Working frequencies: 1520μs / 330Hz Operating Voltage: DC6.0~7.4 V Operating Speed (6.0V): 0.055sec/60 degrees Operating Speed (7.4V): 0.045 sec/60 degrees Stall Torque (6.0V): 2.8 kg.cm (38.89oz/in) Stall Torque (7.4V): 3.5 kg.cm (48.62oz/in)
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02-20-2017, 11:21 AM | #7 (permalink) |
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Sounds correct to me, ele, ail, aux 1 and rud.
Your issue will not be anything to do with servo settings, since they respond to cyclic commands, so this cannot be the issue. The fact that they don't respond at all to collective, or pitch, any of them, is a fairly clear indication that you are not sending collective from your Tx, or it isn't changing in value at least. You need to check your servo monitor to ensure that you get an output on Aux 1. If there is no change of output on Aux1 then you need to make sure your Tx is set correctly to output Aux1 when you move your throttle stick, by choosing an appropriate heli mode swash type. See the following extract from the manual: Never enable your radio‘s eCCPM mixing function. All the swash plate mixing will be done by MICROBEAST PLUS. Always set your radio‘s swash mixer to mCCPM (mechanical mixing) which is often called “H1”, “1 servo” or “normal“ mixing or disable “swash mixing” at all. The reason I have quoted the MB+ manual is that there is much less detail in the AR7200BX manual. Both of my Spektrum transmitters seem to rename Aux 1 to Pit on selection of an appropriate heli mode, so look out for that too. Regardless of what it is called you should have something other than throttle move when you move your throttle stick. EDIT: Too slow on my part. Stefan has beaten me to it. Looking up manuals, checking my transmitters etc, slowed me down. Or maybe I just type slowly, lol.
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02-20-2017, 11:21 AM | #8 (permalink) |
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Thread Starter
Join Date: Sep 2013
Location: California, forest falls
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In response
I have tried switching the different swash modes in both TX and gyro. Another member suggested I try normal 120° on gyro and 90°on tx so I tried different combinations on both. No help there. And I'm unclear what the servo monitor is? I have function for both sticks on all servos (correct sick mode) for collective but only the ports Elev and alie for pitch. There are four options under setting "I" different combinations of normal and reverse of the three servos around my swash. The four options are to make all servos work in unison when pitch is applied to the entire swash. The servo plugged into aux1 port is not responding (regardless of which servo I plug into it) when I give it pitch/throttle input. Making it impossible to know if I'm selecting the proper combination of reverse and normal servo function in setting "I". In the setting for pulse width im not sure which of the numbers in the specs you posted correspond to the options in given. Also in the setting for hertz the highest option in the gyro is 200 hertz. Your specs say 330 hertz? I'm unclear if I set that option for the highest at 200 or if the specs and that option are unrelated?
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02-20-2017, 11:31 AM | #9 (permalink) |
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What transmitter do you have. You definitely do not mess with combinations of things. It is normal, single servo, 90, or H1 in your radio, depending on how it is described, and the default of 120 degree in step H (Red Solid), assuming you have a 120 degree swash.
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Regards, Sutty BeltEXI, mCX, mSR, 4G3, FBL Trex250SE µB, FBL Trex450Pro µB, FBL Trex550e VX1 Pro, FBL Trex600ESP VX1e, Parkzone P51D, QRX350Pro |
02-20-2017, 11:33 AM | #10 (permalink) |
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Thread Starter
Join Date: Sep 2013
Location: California, forest falls
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My tx
It's a dx7 v2. I have set both gyro and TX to 120°normal .
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02-20-2017, 11:35 AM | #11 (permalink) |
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Well that is incorrect. You need the Tx set to normal, not 120 degree. I have a DX7, but it is not a V2, so I think it will be like my DX18 which states normal.
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Regards, Sutty BeltEXI, mCX, mSR, 4G3, FBL Trex250SE µB, FBL Trex450Pro µB, FBL Trex550e VX1 Pro, FBL Trex600ESP VX1e, Parkzone P51D, QRX350Pro |
02-20-2017, 11:39 AM | #12 (permalink) |
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Thread Starter
Join Date: Sep 2013
Location: California, forest falls
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The swash
The swash servo layout is a y pattern.
The heli is a trex 450 dominator. I have it set to the appropriate swash type. I'm at work and don't have my TX in my hands so I don't recall if it says normal or 120° but the image on the screen of my TX matches what the swash on my Lil lady looks like And the gyro has the same setting
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02-20-2017, 11:46 AM | #13 (permalink) |
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The following is correct:
The following is wrong:
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Regards, Sutty BeltEXI, mCX, mSR, 4G3, FBL Trex250SE µB, FBL Trex450Pro µB, FBL Trex550e VX1 Pro, FBL Trex600ESP VX1e, Parkzone P51D, QRX350Pro |
02-20-2017, 11:56 AM | #14 (permalink) |
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Thread Starter
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Really!!!
Ok well that may be my problem! The second picture is what my heli looks like but I'll try setting it to the first picture when I get home. Thanks sutty!
Best regards smitty
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02-20-2017, 01:11 PM | #15 (permalink) |
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The reason you do that is that the MB is looking for discreet channels only, ail, ele and pit, which it then uses to decide what to do. It performs the mixing, and this is set at step H to match your heli, which will indeed be 120 degree, solid red, the default.
The other setting pre mixes it in the Tx, and therefore causes incorrect operation at the MB, which then goes on to mix it itself. Even if it doesn't immediately resolve your issue, you will at least be on the correct foot, and not wondering about that part of the set-up, and can then fault find with confidence. The DX7 V2 will have an output monitor screen. It will be a screen something like this. It allows you to see where all the channel values are at any given moment: EDIT: No idea why it's upside down. The original is the right way up on my PC. Anyway, you get the idea.
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Regards, Sutty BeltEXI, mCX, mSR, 4G3, FBL Trex250SE µB, FBL Trex450Pro µB, FBL Trex550e VX1 Pro, FBL Trex600ESP VX1e, Parkzone P51D, QRX350Pro |
02-20-2017, 06:15 PM | #16 (permalink) |
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Post 2 stated TX to be set to normal 1 servo
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02-20-2017, 07:51 PM | #17 (permalink) |
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Thread Starter
Join Date: Sep 2013
Location: California, forest falls
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That was it
Thanks everybody. Problem solved! I will continue with my setup on my next day off. All the help from you guys is indispensable. You all are very generous to help people out like this. Just for our shared love of the sky. And beating it into submission!!!
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