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Was the Deckel High Speed Head designed to spin in only one direction, or can the motor be run in reverse?
On a factory original FP2, the power connector is polarized, and the on/off switch is just that, on or off. There is no provision for reversing. I suspect that somewhere in the powertrain there may be threaded retainers that are handed, and designed for one-directional rotation.
Not related to my new FPS machine. I have a traditional FP1 high speed head (which I will be putting on the FPS), but which is original Deckel manufacturer many years ago. The original power cord on this head had no method of reversing the electrical which has led me to believe it is designed for non-reverse operation, but wanted to confirm with folks that are more knowledgeable.
You can see the head in this photo (right cabinet, far right top position):
View attachment 334016
The reverse function would be done by the spindle direction switch in the control cabinet?
Does your machine have a forward/reverse switch…….I don’t think it matters what direction the high speed head turns as far as the hardware is concerned?
Beautiful machine, BTW!
Kevin
You can see the head in this photo (right cabinet, far right top position)
View attachment 334016
That looks identical to my FP2 high-speed head, which as I said above, has no factory provision for reversing. But I suggest that you ask FPS, I am curious what they have to say.
That's a nice collection of heads and accessories. One comment though. In the bottom left compartment, it appears that the mating surface of the mounting flange of the universal-type rotary table (the one on the right) has been painted. Or is it just the lighting? That surface should be scraped for contact, not painted.
The high speed head just has a simple 3-phase plug, that's all. Turns on as soon as electrical applied to the plug. This is totally unrelated to the mill, the high speed head just sits on top channel mount, its operation is totally independent of the mill.
Sometimes having reverse on the head could be somewhat more convenient....the Rusnok head for example has reversable motor and was designed as such.
The high speed head plugs directly into the machine control cabinet, as all the attachments are designed to do, the head is controlled just like the machine spindle would be?
If the high speed head was powered by an external source, you would then bypass the safety portion of the control!
When you plug in a centering scope into the cabinet, the machine spindle cannot be energized, otherwise, you would destroy your scope!
I’m unsure, if you have the high speed head running on the last generation machines, if the horizontal spindle would be turning, I would think that only the high speed head would be powered?
That’s not to say you couldn’t put a drum switch directly on the head to make it more convenient, but then you still have to select high/low speed on the operator's console?
Kevin
First question i have is why would anyone wish to run the high speed head in reverse.....You got some left hand reverse cut end mills that you need to run?
Remember this is a head designed to run small tools....
Precludes the boring head or face milling etc.....Don't think one would power tap using the high speed head....
At any rate there are different high speed heads......
The later "Square" style having the short base can easily run in reverse if needed.
On the early (3150rpm) FP-NC's there is a socket on the main electrical cabinet that is for the high speed head.
The socket is controlled via relays that are energized via the operators spindle push buttons and it can run either froward or reverse depending on which direction spindle button is depressed...
Setup also disables the main spindle motor....
Later NC machines that were fitted with the two speed shift for the vertical spindle eliminated the high speed head socket and relays....Not needed as the main spindle was now capable of running at 6300 RPM.
Early FP's had a socket on the cabinet that used the main motor start PB to activate ...If the machine has only froward (single motor) then the high speed head is single direction as well....
Not aware of any physical reason that the head couldn't run in reverse...just don't see the reason one would need to do so.
Believe the later "Active" machines have a switch to set the direction of the main spindle motor and this, i believe, sets the direction of the high speed head if connected to the proper cabinet outlet.
On the late machines the main spindle motor is blocked from running when the high speed head is connected as there is a feed motor to allow axis movement.
Cheers Ross
We must be talking different generations of machines. My FPS (which is clone of the latest generation Deckel Aktiv Digital FP1) does not have such power sources at the control panel. With respect to safety, don't really see an issue having separate power control for the high speed head versus somehow running it through the control panel. My actual solution is to put a VFD inline between high-speed head and power outlet which does have an on/off switch and also controls speed. The high speed head as far as I'm concerned is just an add-on to the machine to give faster spindle speed, and one just uses the X/Y/Z on the machine and does not turn on the built-in spindles.
Always found the FPS regenerated Deckel clones a bit of a funny deal.....
Can't understand why they stayed with a full compliment gearbox for the spindle drive.
Would have thought an AC inverter rated motor with actual positive encoder feed back and a true spindle drive along with a two or three range gearbox
to be a superior setup and likely less expensive to manufacturer that would run cooler and quieter....and give a wider speed range.
I understand why Deckel stayed with the gearbox as long as they did even with the NC's , but a new machine built today with old expensive tech....i don't get it....
Cheers Ross
Not related to my new FPS machine. I have a traditional FP1 high speed head (which I will be putting on the FPS), but which is original Deckel manufacturer many years ago. The original power cord on this head had no method of reversing the electrical which has led me to believe it is designed for non-reverse operation, but wanted to confirm with folks that are more knowledgeable.
You can see the head in this photo (right cabinet, far right top position):
View attachment 334016
I understand why Deckel stayed with the gearbox as long as they did even with the NC's , but a new machine built today with old expensive tech....i don't get it....
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