This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.
Messages - Lotuswins
Pages: 1 2 [3] 4 5 6 ... 11
31
« on: February 04, 2020, 04:08:09 PM »
Hi Luke,
I'm still working on my home brew TCB, and have it mostly working now. I just came across an issue though that I need help on. For the high intensity flash I have connected a BC327 transistor for Q9, which has a little lower rating than what the TCB has listed (.8 amp, 45v vs 1.0amp, 60v). The flash had been working, using the latest LED flasher from Taigen, but stopped yesterday when I was confirming things were all good. I tested the flasher on another tank, and it works fine. I tested circuit continuity okay, and then for output but no trigger so I figure the transistor has broken down.
I noted that this is a unique transistor (PNP) for the board, and am wondering why? and if perhaps the flash is needing a higher rated transistor? Recommendations for a through hole?
BTW, I changed the Q9 resistor too, from 150 to 562 as you recommended for the BC337's, I hope that is correct??
Thanks, Jerry
32
« on: February 01, 2020, 01:25:54 PM »
Hi Luke,
Thanks for the compliment!!
I was able to repair the 2x5 sabertooth by replacing the left channel AO4838 IC's, two each at 60 cents per.
I was also updating all my other TCB's with the new firmware and tuning the recoils. When working with the 2x5 sabertooths, which I have 5 in service now, I found that if I set the duration at a nominal amount, say 20, and then run the speed up until the red error light on the sabertooth just starts to blink on recoil, then back off a little, then run the duration up until I achieve the appropriate recoil for the model, it works better. Double check the speed setting again after all this, and it doesn't do too badly. Charge the battery before testing though as this can have an effect on the current the controller can draw.
Thanks again!!
jerry
33
« on: January 30, 2020, 04:59:20 PM »
Further progress: Tiran4 (IDF T55A) with HK ESCs: Thanks for all your work Luke!! Looks like a winner!! jerry
34
« on: January 30, 2020, 02:34:44 PM »
Hi Luke, I noted the peak current numbers the Dimension Engineering listed in their descriptions, but wasn't sure about spikes. Maybe the peaks are the spikes, since the error light does come on for the duration of the recoil. At least that is the way it seems. Too bad we can't 'tune' that aspect. As for the turning, yes, the KV1 chassis seems to do better on the turning with ESCs than the King Tiger. The KV chassis has narrower tracks, and is lighter with bushing gearboxes, only BB on the drive axles. The shorter the chassis, the lighter it is, the wider the wheelbase, and the narrower the tracks all apparently contribute to the turning ability. The KT is maxed on just about all that, and is the worst turner of all my tanks. So I tested the Scout in my KV1 just now with the new settings. It doesn't have the current limiting since the tank really responded to the recoil. I eventually settled with 100/7 for settings since it only has a 75mm gun, and is a massive tank in reality so thought the gun would not show much recoil. Nice. So I guess I now should do ESC's or build that new Scout I've been putting off for so long for my T55A, to get that to a better recoil reaction...which started all this.  jerry
35
« on: January 30, 2020, 12:40:05 PM »
Hi Luke,
So I resumed testing this morning by installing, temporarily, the 2x12 into the KT. The ESCs worked well, at least from a recoil standpoint, but they suffered drivability issues with the heavy, wide tracked, all ball bearing KT. It would either do wide turns or 90 degree turns on the high traction carpet unlike the sabertooth which would regulate the inner track speed quite nicely.
So at the same recoil settings of the ESCs, 100/30, I now have some recoil. Not as sharp or crisp as the ESCs, but at least something. The driveability is restored though, and the red error light does come on with recoil, as it did with the 2x5 controller.
Hmmm, mayhap I'll try the Scout in the T55A to see how the recoil works. It is not too heavy, and has plastic tracks. Back in my previous life,....we used to allow 5 to 7 times running current for motor start. But its hard to capture that initial spike as rotor position, and other mechanical factors affect it, which may be why the recoils are not consistent.
It would be nice to know what the current limiters in the Sabertooth's are set at.....
jerry
36
« on: January 30, 2020, 01:26:09 AM »
Hi again,
So I tested the 2x12 sabertooth with 380 motors on the Pershing with the updated firmware and glad to report that I can achieve a quick, sharp recoil at 100/35 setting. So in conclusion it looks like the 2x5 sabertooth simply cannot conduct the quick, higher, locked rotor current of the recoil successfully.
I'll order up some ESC's for the T55A and see if that cannot solve the issue.....
Jerry
37
« on: January 30, 2020, 12:23:50 AM »
Hi Luke,
Okay, did some more testing.
On the KT w/2x5 sabertooth I found I could get the red error LED to light by jamming full throttle up quickly, consistently. So perhaps the current is causing this?
So, thinking that possibly the current limiter of the 2x5 is getting in the way of the high current of the recoil I changed the sabertooth for a pair of the HK 45A ESCs. Ahh, now we are talking...... adjusting the recoil settings down, to 100 speed, 30 duration, and I'm getting a sharp recoil, but short duration, perfect.
So perhaps the smaller sabertooth isn't up to dealing with the recoil current on the 390 motors? However, the T55A had the smaller 380 motors, but still didn't have a sharp, quick recoil, so perhaps the serial motor controller cannot do sharp, quick recoils? I'll have to get additional HK 45A ESCs for the T55A for testing.... or perhaps I can put in a 2x12 to test with my Pershing... I'll see what I can do tomorrow......
Jerry
38
« on: January 28, 2020, 07:59:25 PM »
Hi Luke,
I just tried the new version on my King Tiger, with 390 motors/sabertooth 2x5a/Taigen steel gears 4:1 ratio, all metal beast. And noticed:
1) can't get any recoil until 200ms duration.
2) at max settings it has some recoil, but somewhat erratic. Sometimes nothing, sometimes a good hit, but with the new Taigen BB gearboxes, they have now keyed the final drive gears to the axles, instead of a press fit so there is a noticable rotation slop in the axle to final drive. So with this arrangement, when a good recoil happens, you can hear a snap when the key hits against the gear or shaft. Not too sure I like this issue.
3) I was observing the Sabertooth Motor Driver too, given my recent experience, and noticed that on recoil the red light would come on at recoil. This concerned me also.
I will have to look into what the red light means, other than a short, but I expect the locked rotor current on recoil is setting the light off. Have you any experience with that?
Jerry
39
« on: January 28, 2020, 05:18:20 PM »
Hi Luke, Thanks for the quick response. I have one of those Tamiya gearboxes in my 38T Panda. Smoothest tank I have, but I had to find the right motor for it since the 3v ones included didn't last too long at 7.2v.....  So in connecting up the Tektronix scope, I essentially grounded one output lead from the Sabertooth, and since the ground from the USB is common with the scope it must have been firing to ground each time I did the recoil. I also noted the mouse on the computer, also plugged into the USB port, stopped working for a short period ....near miss? I will try the relocation of the Clark, maybe it will be anemic, but I don't think so.....Shouldn't take too long to dummy it into the other T55A since all I need is motor connections and battery. Good idea to prove viability. Jerry
40
« on: January 28, 2020, 03:34:46 PM »
Hi again Luke,
So apparently the probe ground lead is common with the input plug ground pin, ugh....
I removed the back of the sabertooth 2x5a and I see a fried 4838 GA7G11 by Alpha & Omega.
I've ordered a few AO4838 by A&O, to replace it....hopefully it will take. The right hand motor still works, so very possible.
Two steps back...drat. I hope the video above is useful?
Jerry
41
« on: January 28, 2020, 12:57:49 PM »
Hi Luke, Well, good news, and terrible news...... The smoker now works as advertised, thanks so much. My Sabertooth 2x5 is now a smoker... Here is the sequence of how I proceeded with the testing of the recoil. I adjusted both velocity and duration up until I got some recoil. Had to go to maximum on both settings. Note that this tank has a sabertooth motor controller which may be an issue with getting a good pulse for the recoil. So the recoil was still not robust enough, only a short burst, and it looked more like someone was pushing back on the tank rather than a sharp gun report was happening. I then removed both motor leads from the motor controller, and hooked up the scope to the output of one motor and got the pulse shown in the video: Then I reconnected the motor leads, and disconnected the scope and USB cable, noting that the USB end that plugged into the TCB was warm, and the ground lead alligator clip to the scope was also warm....hmmmmmm. Upon starting the tank, the saber tooth controller would not move the motors, and so I cycled the battery switch, with no effect so I reflashed the TCB....all flashed okay. So tried again, and the tank moved fwd on first try but subsequent tries the red light on the saber tooth went on, and smoke issued from underneath the controller, between the aluminum lower and the circuit board apparently. I guess something has happened to the drive FETs on the board? I must have created a ground loop between the USB, the controller, and the scope? First time ever this has occurred, as I thought the scope would be isolated from input grounds, and the USB connection also.....So it looks like I'm out a controller for my trouble....ouch!! Jerry
42
« on: January 19, 2020, 08:09:02 PM »
I would like to attach the .opz file.....however, it seems to be hidden. I can find it in opconfig.exe....but not when trying to attach it in the below attachments and other options. Sigh......
Okay, figured a way by sending it to my documents folder, then it will see the darn thing......
jerry
43
« on: January 19, 2020, 04:28:12 PM »
Not a converter, but an Sbus system: Turnigy 9x/XJT
Snoop:
Radio Ready - SBus
---------------------------------------------
FIRMWARE VERSION: 0.93.67 (EEPROM Size: 481)
---------------------------------------------
RADIO INFO - SBus
---------------------------------------------
Stick Min Center Max Deadband Reversed
---------------------------------------------
Throttle 989 1500 2012 25 FALSE
Turn 989 1502 2012 25 FALSE
Elevation 1024 1500 1976 25 FALSE
Azimuth 1023 1500 1976 25 FALSE
Aux Chan. Min Max Type
---------------------------------------------
1 988 2012 Digital
2 988 2012 Digital
3 988 2012 Analog
4 988 2012 Digital
5 880 1500 Analog
6 880 1500 Analog
7 880 1500 Analog
8 880 1500 Analog
9 880 1500 Analog
10 880 1500 Analog
11 880 1500 Analog
12 880 1500 Analog
---------------------------------------------
Channels detected: 16
Channels utilized: 16
---------------------------------------------
MOTOR TYPES
---------------------------------------------
Drive Motors: Sabertooth Serial
Turret Rotation: Onboard Motor Driver (A)
Barrel Elevation: Onboard Motor Driver (B)
Mechanical Barrel: Airsoft (Disabled)
---------------------------------------------
DRIVE SETTINGS
---------------------------------------------
Vehicle Type: Tank
Active Driving Profile: 1
Accel Ramp Enabled: No
Decel Ramp Enabled: No
Motor Nudge Enabled: No
Forward Speed Limited: Yes - 90%
Reverse Speed Limited: Yes - 40%
Transmission Type: Automatic
Shift Time: 0.0 sec
Engine Pause Time: 0.0 sec
Transmission Delay: 0.0 sec
Neutral Turn Allowed: No
Turn Mode: 2
Track Recoil Enabled: Yes (Kickback speed 100%, Deceleration factor 2)
---------------------------------------------
TURRET SETTINGS
---------------------------------------------
Turret Rotation Speed Limited: Yes - 80%
Barrel Elevation Speed Limited: Yes - 75%
Recoil delay: No
---------------------------------------------
SMOKER
---------------------------------------------
Smoker Type: Combined Heat & Fan
Pre-heat delay: N/A
Fan idle speed: 100% Heat: Same as fan
Fan fast idle speed: 100% Heat: Same as fan
Fan max speed: 100% Heat: Same as fan
Smoke when destroyed: 100%
---------------------------------------------
BATTLE INFO
---------------------------------------------
Is Repair Tank? No
Fire Protocol: Tamiya
Hit Protocol 2: Taigen V1
Repaired by: IBU Repair
Send MG IR Code: No
Accept MG Damage: No
Damage Profile: Tamiya Spec
Weight Class: Heavy
(9 cannon hits, 9.0 sec reload, 10.0 sec recovery)
---------------------------------------------
SOUND CARD
---------------------------------------------
Sound card: Taigen Sound Card
---------------------------------------------
FUNCTION TRIGGERS
---------------------------------------------
Turret stick functions: Yes
Turret movement delay: 0.35 sec
Turret Stick - Top Left -> Function #1 - Engine - Toggle On/Off
Turret Stick - Top Right -> Function #7 - Cannon Fire
Turret Stick - Bottom Right -> Function #16 - Light 1 (Headlights) - Toggle On/Off
Aux Channel 2 - Pos 2 (of 2) -> Function #11 - Machine Gun - Fire
Aux Channel 2 - Pos 1 (of 2) -> Function #12 - Machine Gun - Stop
Aux Channel 3 - Variable -> Function #56 - RC Output 2 - Pass-through
Aux Channel 1 - Pos 2 (of 2) -> Function #13 - Airsoft/Mech Recoil - Enable
Aux Channel 1 - Pos 1 (of 2) -> Function #14 - Airsoft/Mech Recoil - Disable
Aux Channel 4 - Pos 2 (of 2) -> Function #82 - Smoker - Enable
Aux Channel 4 - Pos 1 (of 2) -> Function #83 - Smoker - Disable
---------------------------------------------
BATTERY
---------------------------------------------
Battery Detected: Yes
Voltage: 7.67v
LVC Enabled: Yes (6.3v cutoff)
---------------------------------------------
BAUD RATES
---------------------------------------------
USB Serial Baud: 115200
Motor Serial Baud: 38400
Aux Serial Baud: 115200
Serial 3 Tx Baud: 38400
---------------------------------------------
MG Stop
Airsoft - Disabled
Smoker disabled
Note: smoker comes on on engine start....so not sure the difference betwixt yours and mine.....but all mine that I've messed with since the upgrade have the smoker come on initially.... hmmmm
44
« on: January 14, 2020, 09:31:24 PM »
Thank you Luke, yet again!!
45
« on: January 12, 2020, 05:34:09 PM »
Hi Luke, You were right, it is full battery and if I got this right, it is 25ms long. Just a square wave, nothing fancy. Took me a while to figure out how to get the scope to measure just a pulse (I actually had to read the bloody instructions  ). Thanks, Jerry
Pages: 1 2 [3] 4 5 6 ... 11
|
Show Posts