Showroom Budget Compact 6DOF Universal VR Flight / Racing rig - MSFS, SMC3, FlyPT, Transducers, Controls

Hi guys,
Calibrated the hall sensors now as per instructions, some sets have "high ranges" difference, don't know why as I triple checked the magnet holder is placed properly as per @HyperJoel suggestion above.
Other thing is when checking in SMC3 moving the motor arms manually one of the green line goes the wrong way, the guide clearly states that moving the arm up the green line should go up and viceversa, how can I fix this?
From my understanding it might have something to do with the reverse setting in the Arduino firmware but I dont know which one it is. Could someone please advise?
Thanks

I should've updated my comment, I'll go back to it tomorrow when I'm at my computer again, but I'm not sure that's right anymore. I thought I had it figured out because I was finally getting accurate data in SMC3 util, but after more testing I think the magnet should be rotated to where the center point in SMC3 utils' graph matches where you want the neutral position of the arm to be. I haven't gotten back to this magnet position setup yet so still not 100% sure I'm right about that. Also thinking rotating the magnet 180 degrees would invert the readings from the hall effect sensor, haven't confirmed that either.

I've been more focused on reworking the relay board setup. I think having 2 motors going through one relay caused the relay to get welded in the closed position internally when I first powered them. I'm modifying my setup to use 1 relay per motor so they're handling less current.

Yes, first check if the magnet N/S orientation is the same with all 4 magnet holder. Then switch +/- at the engines, that everything is in line.

To the calibration, it's normal, that they differ a bit. That's why the software wants the max/ min values. It normalizes it.

Still have some of the arms available if anyone wants a set.

water jet cut from A36 steel.
$120 a set +shipping if you are interested. I'm located in the central US

Hey all. Just wanted to share a leason learned. If you are shipping steel parts from the US to Canada there is currently at 25% tarrif on US steel. This raises the cost of shipping significantly! Be sure any shipper/seller tries to estimate any tariffs, taxes, duties, and brokerage fees upfront to avoid any surprises.

Hello, I'm at the very beginning of constructing my 6DOF Roman Simulator. I’ve already ordered almost all the required parts and I have completed the base and the platform. That said, I have one worry… I purchased the motors from Alibaba and it seems the motor is deeper than the one typically used. Do you believe this motor will still fit within the layout / dimensions indicated in the plans? In the picture this is the motor I ordered (201.8mm) and the one typically used (total 170mm)

I saw a picture of his motor, and it's the same one you bought. This type of motor comes in short shaft and long shaft versions.

Thank you for the reply. I will confirm when I reveive the motors. If they are not the same depth I will have to enlarge the base structure a little bit.

Is it me or the wiring doesn't make sense on the 8 Channel relay Module ? What is the purpose of the loop between IN1 to IN5 ? Also Arduino control relay 6,7, 8 but only relay 5,6,7 output are wired. I am confused on this part. I would be really greatful if somebody could explain me

Ok I figured out what is the purpose of loop for IN1 to IN5. And I guess this is only a schematic error for relay 6 through 8...

I am looking at this also. Can you explain further. Thanks

From what I understand, this is a way to close everything if the Emergency button is activated.

Hi Together,

i build a similar RIG with this components:

- 6x Motors 250W / 24V / 75RPM (same as Roman is using)
- 6x Hall Sensors from Ali. The finished ready to use potis with 180°
- 3x Arduino Nano
- 6x IBT2 Driver with isolation between Heatsink and PCB and additional Heatsing on the top
- 2x 24V 50A, 1200W power supplies from Ali (https://de.aliexpress.com/item/1005..._main.409.21221802CGnfyZ&gatewayAdapt=glo2deu)
- Gas spring folding hinge 500N

- SimHub with full motion license
- SMC3 V2.1 (with soft start)
- SMC3 config:
SMC3_Version=210
Motor1_Kp=140
Motor1_Ki=0
Motor1_Kd=10
Motor1_Ks=5
Motor1_PWMmin=60
Motor1_PWMmax=150
Motor1_PWMrev=120
Motor1_Limit=20
Motor1_Clip=105
Motor1_Deadzone=0


My rig is moving nice and smooth without me
With me as load (86kg) it moves just some seconds and different motors switch off.

I guess this could be the protection of the fake IBT2.
All my motors and drivers all cool.

That could be also the power supply but also this parts stay cool.
Does anyone have any ideas?

THX
Georg.

Good question, I don't have a direct idea. Do you have the correct gear ratio? There are different gear versions of the motor.

All Motors are from the same order.

MY1016Z with the same technical specification Like in the second Post Here

I will try a different Power supply in rhe next days

Running 6 motors off of two power supplies is the most likely issue. The motors switch off because the power supplies exceeded the max current draw and they tripped. Recycling power resets them.

If you had an amp clamp you could verify.

Current draw is the issue. The harder the motors have to work (your weight and movement) the more current is required.

That could be a issue BUT one Power supply should Power Up to 1200W. Every supply is used for 3 Motors with max. 750W. Thad should work.

The next Point: if the voltage drop because of the high current. Why Just one Motor Driver shuts down and Not all 3 on the Same supply.

I will replace one Power supply and Test it.

I Hope that IT IS Just the cheap Chinese Power supply.

That is not quite what is going on with electric motors.

If you looked at just wattage that would make sense, but it's not about the total wattage.

The current draw is very low with little to no weight. As the weight is increased the voltage remains the same but the current increases. You power supplies are 50 amps, once this threshold is exceeded the power supply shuts off for self protection.

I'm not sure what the current and voltage limit is on the IBT's, will look into what makes them trip.

I will create a video in the next week using an amp clamp to show what the current draw is with no load and idle versus working hard with weight in the seat.

One 50 amp power supply to three motors equates to 16.667 amps per motor.

The link is a simplistic overview. Feel free to read more about amperage. I am simply trying to help you understand what causes the shutdown.

Free DC Motor Current Draw Calculator | FIRGELLI Engineering

My sim build with 24VDC wheel chair motors also uses inexpensive Asian built power supplies 480 watts and 20 amps. One for each motor and no issues with power downs.

That is why you see people with 12 volt setups use a car battery, never short on amperage.

Hi

Sorry.
I didn't mean to criticize you. I just want to understand.
I have the necessary measuring equipment: current clamps, a multimeter, an oscilloscope, etc. I just didn't have time yesterday to set up the measurement.

The IBT2 drivers can handle up to 43A. The drivers from Roman, for example, can handle significantly less. If the calculation from your link is even roughly correct, then the motors could draw up to 73A peak.

Today I’m going to put together a 160A power supply from old server power supplies and use it to test a branch circuit and try to measure the current.

Thanks