Erie Fred
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I don't understand what that means.
- Thread starter Smouser
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Brad93
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Turning the wheel backwards is a bit like a bicycle wheel, it freewheels and doesn't drive anything
Smouser
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Oh wow.So now we know... You don't want to drop it on your toes, and you don't want to get your fingers caught in it.. (My wife was in a hurry using the little toggle press the other day, and couldn't work out why it wasn't going down properly- so pushed harder - then realised it was her finger in between the dies,
To be fair she has limited feeling in that finger.. Cue pain and discomfort........ I don't let her play with the fly press or power tools.....)
Have you worked out what the pneumatics do?
The pneumatics is just the 'trigger' to engage the flywheel with the crank that drives the bit going up and down. I assume when the motor runs, all it does is turn the flywheel and there is no load. As soon as the 'trigger' is pulled it engages the crank.
It was probably originally just a mechanically linked foot pedal.
I might need to make a little video of it working so people who are interested can see.
I don't know of it is the correct term Brad93 used but the flywheel can be spun backwards but it is not engaged on the crank.
*Edit* exactly like @Brad93 said. Works the same as pedals on a bicycle if you pedal backwards.
Erie Fred
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Is this a single revolution clutch arrangement ?
Not a friction clutch ?
I'm used to the friction clutch style, they have holes in the flywheel outer edge for barring over.
Brad93
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Arc Tourist
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Sorry, late to the show here. All I can recall about the mechanics is that the the die needs to be set up correctly, with the punch having just a fraction of clearance so it can fully cycle without mashing into the table when the die is empty.
Yes please! I presume the motor output is geared down to quite slow, or it's a sort of 'one shot' pedal, so it only spins and presses once - not at 1400rpm
(Although that may then make a marvellous - if small - planishing hammer....
)
Smouser
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Made a very quick video. Might make a better one once I have actually connected the motor up to a VFD.
I have set it up so that the 'clutch' is in the same position as when I got the machine (while it was stuck in the down position).
On the video, I first spun the flywheel backwards to show it does not operate the crank when spinning backwards.
I then showed the "trigger" operating (which is currently connected to a pneumatic cylinder).
Finally, I turn the flywheel in the correct direction and hold the 'trigger' down. The crank remains engaged as long as you keep the 'trigger' down.
Video
I have set it up so that the 'clutch' is in the same position as when I got the machine (while it was stuck in the down position).
On the video, I first spun the flywheel backwards to show it does not operate the crank when spinning backwards.
I then showed the "trigger" operating (which is currently connected to a pneumatic cylinder).
Finally, I turn the flywheel in the correct direction and hold the 'trigger' down. The crank remains engaged as long as you keep the 'trigger' down.
Video
Erie Fred
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...or when a too thick piece is stuffed into it.....
Smouser
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It didn't when I got because the 'clutch' was stuck at the top, it never made it to the trigger.
Erie Fred
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Why would you want to vary the speed on the motor ?
is it a class 4 or hi-slip motor ?
Smouser
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Not sure about class 4 or hi-slip, it is a 700 rpm 0.5hp, 3-phase 400V motor.
I don't want to vary the speed of the motor.
The motor is a 3-phase 400v 'only' motor and I only have 220V single phase power at my house. I have to use a vfd to convert the single phase 220v power into 3-phase 220v. It was done just to check if the motor actually runs and that the press works.
I don't have a spare single phase 220v to three phase 380v vfd lying around currently.
I could potentially try to dig the starpoint out in the motor so I can wire it to DELTA (220v 3 phase) but it might not be worth it. Allegedly, those very old motors don't really like vfds and the insulation can break down on the windings.
I took some VERY rough measurements of two motors earlier to show the differences in size.
The press' motor a 0.5 hp, 0.37kW
Vs
A more modern spare motor 0.75hp 0.55kW
Besides, I don't have a use for the press or the room to keep it.
I was just having a bit of fun figuring out how these old presses worked. I will most likely list the press for sale in the near future and if it does not sell, include it in the scrap steel run I need to anyway. I really hope I don't have to scrap it though.
The first run. The motor is massively down on power.
Arc Tourist
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When out hunting in Rattler country, make sure to urinate on the open and not into the brush or bushes.
Seriously.
Smouser
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When out hunting in Rattler country, make sure to urinate on the open and not into the brush or bushes.
Seriously.
Unless you want whisky or brandy stimulant?
Arc Tourist
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Smouser
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The little Bliss press is no more.
Had my fun and sold it on fb marketplace this afternoon.
The new buyer works for a company that makes disability ramps and he said they needed to change tooling too often. It is much better to just get cheap presses and have them do one job.
Thanks all for your help on getting it going!
Had my fun and sold it on fb marketplace this afternoon.
The new buyer works for a company that makes disability ramps and he said they needed to change tooling too often. It is much better to just get cheap presses and have them do one job.
Thanks all for your help on getting it going!
Wow - you didn't hang about!!
This is what I have been doing - buying presses, set them up and leave them that way. Mine haven't needed to be quite so heavy duty though - I can make do with #2 flypresses
