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Programming for a slotting head

Mud

Diamond
Joined
May 20, 2002
Location
South Central PA
Is anyone here doing vertical slotting with CNC operation? If so, how are you programming it? Many Deckel and other slotting attachments have no clapper, so how do you manage the feed? Just feed very slow and let it rub on the upstroke? Or program short infeed moves with a dwell in between?
I've been feeding by hand in short moves for single parts, but I'd like to take advantage of the control for doing multiple parts. I appreciate any insight.
Photo for attention.111.jpg
 

beege

Stainless
Joined
May 18, 2007
Location
Massachusetts
Did something like this a long time ago.
G91G81X.002L100
If the control will allow feed without spindle rotation, a drill cycle with repeats can nibble away.
 
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rklopp

Diamond
Joined
Feb 27, 2001
Location
Redwood City, CA USA
I only use my manual Aciera F5 slotting head, and there I just let it drag on the upstroke. The setups are springy enough and the feed increment low enough that it doesn't matter. Does that Richmill head do the vertical reciprocation, or is that just a way to keep the cutter from rotating. (I could not find that model head via googling.) The Deckel spindle is not synchronized, so you have no option but to let the tool drag on the upstroke, since the control does not know when the upstroke is happening if you're driving it with the spindle motor. You could use the Z screw to do the reciprocation depending on your comfort level. It would be easy to write a looping section of code using G91 incremental moves.
 
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Mud

Diamond
Joined
May 20, 2002
Location
South Central PA
It's a reciprocating head. I can't find anything about it either and I've been looking. This is my FP7NC I kinda don't want to run that big table up and down that much. I have a Cincinnati shaper head I want to adapt onto this machine to get a longer stroke, I want to get this small attachment working for small parts like shown.
I just let it drag on the upstroke. The setups are springy enough and the feed increment low enough that it doesn't matter.
What I'm thinking also, thanks.
 

Greg Menke

Diamond
Joined
Feb 22, 2004
Location
Baltimore, MD, USA
My Bridgeport head doesn't have a clapper- just a bushing mounted to the ram, with a 3/4" bore into which I can mount various toolholders. There has been no difficulty dragging the tool on the upstroke. OTOH designing the tool so its rigid and cuts well is the trick. Recently I've been silver-soldering HSS tools onto a length of bar suitable for the stroke, avoids a bunch of grinding and fiddling. The cutter perpindicular to the work makes generating a cutting edge more straightforward and permits the use of the largest feasible diameter bar.
 
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AlfaGTA

Diamond
Joined
Dec 13, 2002
Location
Benicia California USA
I have shapped parts using both the Deckel slotting head and the machine spindle on my FP4NC.
Using the spindle, i made an adaptor that clamps to the quill (slightly extended) and holds the spindle from rotating...Run the spindle at
S+0 and let the clamp do the holding...Clamp also has provisions to clock the tool for alignment and also takes the thrust loads and feds tehm into the quill to eliminate any possibility of damaging the thrust bearings in the spindle....
Used a loop to to stroke and advance. Worked fine....

The Deckel head i just ran manually advancing the tool at the top of the stroke as it reversed...Did that using the MPG Strokes are slow enough that it worked fine although i did have to stand there for the entire slotting operation....


Wondering is a clever guy could employ a switch on a manual slotting head slide to trigger the MPG...To automate the operation.
Some electronics could multi pulse the input to give variable feed rate...

Cheers Ross
 
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Gloryrates500

Plastic
Joined
Jan 5, 2019
Location
Cologne, Germany
A friend who drives a 1955 Chevy pickup had a lot of trouble getting a new lever for his steering gear. The steering gear that is installed in his Chevy does not appear to be the original anymore. Unknowingly, he had ordered an original lever from the USA, but it didn't fit.
The problem is that the lever is mounted with a conical spline and is positioned over four index faces.
Luckily the serrations in the original lever were smaller so it was possible to machine larger serrations into that lever.

I solved the problem on a MIKRON WF3DCM with HDH 150Q control by making a special tool with four cutting edges, so that I could machine four teeth in one position of the dividing head. The advantage of the MIKRON is that the tool holder can be positioned with a holder, secured against twisting.
Nextgen.jpg
The first tool was made of hardened 115CrV4 steel. But this wore out too quickly, so I made a tool with four cutting inserts.
First, I made a few test pieces out of aluminum to try out the best fit directly on the vehicle. Otherwise you would have had to remove the steering gear.

The appropriate fit was then produced using two programs. One for the conical bore and a second parameter program for broaching the conical gearing.
The knife moves in a diagonal Z and Y downward movement according to the cone. The delivery takes place in Y.
If one tooth is finished, the coordinate system swivels by 90°. The process is repeated 4 times. So, for 32 teeth I only had to swivel 8 times.

Slotting.jpg

202.jpg

IMG_20200630_194231.jpg
I have a 144MB video of the process but have no idea if I can embed videos here.....
Manufacturing in this way is certainly not very economical. But what don't you do for a friend or a '55 Chevy...

Parameters:
3 FN 0 : Q10= +29,200 upper diameter
4 FN 0 : Q20= +27,800 lower diameter
5 FN 0 : Q30= +24,000 depht
6 FN 0 : Q40= +0,050 delivery
7 FN 0 : Q60= +9,775 tool radius

HAIDENHAIN 150Q code for my conical slotting

0 BEGIN PGM 8095 MM
1 TOOL DEF 80 L+0,000 R+9,775
2 TOOL CALL 80 Z S 31,500
3 FN 0 : Q10= +29,200
4 FN 0 : Q20= +27,800
5 FN 0 : Q30= +24,000
6 FN 0 : Q40= +0,050
7 FN 0 : Q60= +9,775
8 FN 2 : Q15= +Q10 - +Q20
9 FN 4 : Q50= +Q15 DIV +2,000
10 FN 4 : Q11= +Q10 DIV +2,000
11 FN 2 : Q12= +Q11 - +Q60
12 FN 1 : Q13= +Q50 + +Q40
13 L Z+10,000 R0 F1000 M
14 L X+0,000 Y+0,000 R0 F2000 M
15 L Z+2,000 R0 F1000 M
16 L Y+Q12 R0 F1000 M
17 L Z+0,000 R0 F100 M
18 LBL 1
19 LBL 2
20 L IY-Q50 IZ-Q30 R0 F1000 M
21 L Z+2,000 R0 F1000 M
22 L IY+Q13 R0 F1000 M
23 L Z+0,000 R0 F100 M
24 CALL LBL 2 REP 29 /29
25 L Z+2,000 R0 F1000 M
26 L X+0,000 Y+0,000 R0 F2000 M
27 CYCL DEF 10.0 DREHUNG (rotation cycle)
28 CYCL DEF 10.1 IROT+90,000
29 L Y+Q12 R0 F1000 M
30 L Z+0,000 R0 F100 M
31 LBL 0
32 CALL LBL 1 REP 3 /3
33 L Z+10,000 R0 F1000 M
34 L X+0,000 Y+0,000 R0 F1000 M30
35 END PGM 8095 MM

Cheers
 
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Gloryrates500

Plastic
Joined
Jan 5, 2019
Location
Cologne, Germany
Finally I managed to embed a video....:rolleyes5:

...and because it's so beautiful I wanted to share this adaptation briefly.
I built an adapter that I use on my MIKRON to make CNC diamond wire saw cuttings.
Nothing needs to be changed on the machine, the adapter can be installed in 10 minutes....
Tungsten carbide .....
and CFC like butter
 
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