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Benders and Bending Which bender is best? How do you use a bender? How do you calculate bends? Everything Bender related...


Benders and Bending Which bender is best? How do you use a bender? How do you calculate bends? Everything Bender related...

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  #41  
Old 09-06-2016, 07:44 PM
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Adam Gardiner Adam Gardiner is offline
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Cylinder volume is approx 1.57l and pump flow rate approx 2.8l so roughly 34s to reach full stroke plus allow a bit for slippage in the pump so say 36s to approx 110 degrees hoping for 30s for 90 degree bend sounds slow but it's a hobby not business venture. And to.me that's more than fast enough to make mistakes
Adam
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  #42  
Old 09-28-2016, 07:18 PM
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https://youtu.be/pPMl-egdYHM

1st of all thanks to the bandit for the maths and other members who had build threads on here.

Got the tube bender working tonight and im over the moon with its performance .
The specifications are.
2.0cc pump
1.1kw 240v motor
200bar max pressure.
It bent tube at 50 bar,
Sorry for the poor video

Adam

Last edited by Adam Gardiner; 09-29-2016 at 03:21 AM.
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  #43  
Old 09-28-2016, 10:39 PM
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bullnerd bullnerd is offline
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Nice job Adam!

Nothing wrong with that video.
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  #44  
Old 09-29-2016, 08:09 AM
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Quote:
Originally Posted by bullnerd View Post
Nice job Adam!

Nothing wrong with that video.

Thanks, couldn't have got it going without the advise from this forum and it's members, the maths for sizing the ram etc, and the input on different styles to go for and there good and bad points,

I still have a fair bit more to do before its finished, I have to mount some jacking bolts to it and 4x removable legs which will be mounted inside the frame coming out diagonally to make its Base about 1.5m x 1.5m. The ram Pivots so a light weight clamp needs adding near the pivot point on the arm (does not do it under pressure but does when no load or pulling back)

I need to get a bigger psu for the control box as I only have a 1A one and need at least 3A as the coil is 2.5A. Then I can use the remote and the display will stop the bender once it's reached the desired angle.

I need to remount the angular gauge so I can still use that to check my display against.

Mount the control box on the frame and paint it all. Put some clamps on the hoses and get rid of the cable Ties!

Thanks again to everyone on here who has answered questions and provided valuable information. At some point I will compile a complete list and rough costings so it's usefully to others.

Adam
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  #45  
Old 09-30-2016, 12:06 AM
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Very impressive! Great job Adam. I love a DRO on a bender and the auto stop is going to be the icing on the cake!
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  #46  
Old 09-30-2016, 05:33 PM
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Just done a quick costing and with 50.8mm die and 25mm square die it cost approx 2000 to get the the spec I have now. All new parts and programmable bend angle.

My question now is...

What else is out there for that money with digital display and automatic stop?
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  #47  
Old 10-01-2016, 06:28 PM
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Ha ha does not exist.
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  #48  
Old 10-07-2016, 04:32 PM
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Integrated the auto stop tonight but had a few issues every time you let go off the "out " button the controller would do all funny things, I had the following, the display reset, freeze, output stick on etc, Found out that 1 out of the 2 x 24v relays didn't have the reverse diode across the coil so a quick trip back to the local maplin store found me getting a 1n4148 diode to fit a cross the coil, I also fitted 2 3a rectifying diodes a cross the solenoid coils,

It worked! I put some tension on the tube and started to bend the tube, I decided to stop and start the bend several times and the display didn't stop, freeze or reset the Value!

I set a bend angle of 93 degrees and the bender stopped on 93.6 degrees(excellent I thought). The tube came out at 88.5 so I should have added a bit more for spring back. I bent a 2nd bend without reseting the zero position and I had a perfect set, I set the angle finder to zero on the 1st leg of the set and it read a fraction off zero on the 2nd leg of the set (dog leg)

Very happy tonight I may add

Adam

Last edited by Adam Gardiner; 10-07-2016 at 04:36 PM.
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  #49  
Old 10-07-2016, 04:54 PM
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Nice job Adam!

New video time.
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  #50  
Old 10-07-2016, 05:06 PM
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Quote:
Originally Posted by bullnerd View Post
Nice job Adam!

New video time.

https://youtu.be/tcqHVDzMtP8

The video is not great and I will try and get a better one soon. The ram Pivots on the mounts as you can see at the start of the video I may look at adding a bracket to stop this but it is quite handy to be able to zero the display once you manually pull it tight to the tube.
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  #51  
Old 10-07-2016, 05:30 PM
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That is too cool! Congratulations Adam! Now you just gotta start mass producing them :)
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  #52  
Old 10-07-2016, 05:39 PM
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That is too cool! Congratulations Adam! Now you just gotta start mass producing them :)
Thanks
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  #53  
Old 10-10-2016, 04:02 PM
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Glad to see the arduino working, this is something that I have wanted to do for a long time. Nice job!
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  #54  
Old 12-11-2016, 07:32 AM
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I'm looking at ways of locking the die to the pin (which my encoder is driven from), I'm thinking of milling a keyway into the pin and broaching a keyway into the die, but the only way I can see to do that would be to make a stepped pin so the bottom where it goes through the 2 lower arms of the bender would be 1" and the top stay at 1 1/4", has anyone done this I am not wanting to use the tube bender to its full potential of 1/4" wall tube etc, my thoughts are that it will work but at a reduced capacity e.g. the same as the model 3,

I did use a grub screw but it slipped so looking for a more positive method

Thanks in advance

Adam
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  #55  
Old 12-13-2016, 01:01 AM
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Here is how i modified the TubeBandit to my M32.




Mod thread here: http://www.offroadfabnet.com/forums/...8985#post98985
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  #56  
Old 12-13-2016, 01:22 PM
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Hi Adam. A pair of set screws should work fine if you mill or grind a flat onto the side of the pin.

Tube Bandit uses a collar that expands on a taper, locking inside of the die similar to how a bicycle handle bar stem locks into the fork. It's more complex than needed, but it was done that way to make it bolt-on and provide a very secure lock w/ the die.
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  #57  
Old 12-13-2016, 04:40 PM
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Thank you both for the replies, I have seen your thread before Rokcrler and looks really good I'm guessing the split spacer just expands on the collar as TheBandit says his uses. I'll try a flat milled on the pin for now and go from there.

Regards

Adam
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  #58  
Old 12-13-2016, 09:51 PM
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Im using Bandits pin to run the TubeBandit, his wedge collar expands my split collar against the inside of the die.

The flat on the pin should work...

Check out what SWAG did here:
https://swagoffroad.3dcartstores.com...TRUCTIONS1.pdf
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  #59  
Old 12-14-2016, 12:17 AM
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It looks like they just have a set screw with no flat?
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