Spade Drills?

[lwells]

Running X4 mu2. Getting into running extended length spade drills. M3-M5 carbide self centering blades. Cat 50 hmc coolant through with chip blaster. First off I'm running a stubby spade drill for a 135 deg spot. I need to start drill slow to center then then full feed once I'm in. Could use some learning on spade drills. I'm not used to running drills at high surface feed. 250+ on dia. from .5 to 1.5. Need drill cycle to go slow full dia. then full feed with blaster. Drills cut great but I'm getting bell shaped holes and major drift. I do mostly gray cast but get some 4140 once and a while. Ellp Meee. Thanks.

[Guest CNC Apps Guy 1]

When I have a situation like that I use a Misc. Drill cycle. In my post, that cycle posts out long hand, then I can set a feed/speed/coolant condition at a particular position.

[lwells]

Do you edit the post or the program? I'm trying to make a custom drill cycle for spade drilling.

[Dave Ball]

Its possible to make the changes in your post but is it worth it? How often do you need the functionality? I have a very similiar mod in my post for gun drilling.

 

[lwells]

Looks like what I'm looking for. I plan on using only spade drills as much as possible. I'm using the mpmaster post I got off this site. I have modified it several times so I know a little bit abought post mods. Maybe MC could add this feature. Definetly what I'm looking for. Logging off for the holidays. More info would be great. Thanks.

[Dave Ball]

First off let me say there are other ways of doing this but this has worked well for my needs. This is a working "gundrilling" mod that should serve as a good guide for you to add what you want to your post.

 

 

Declare your desired variables like below...

 

code:

---

slowdrill_speed : 0 # Single Gundrill - Slow PRM for Gundrill Cycle

slowdrill_feed : 0 # Single Gundrill - Slow feed for Gundgrill Cycle

start_height : 0 # Single Gundrill - Z Start Position

first_depth : 0 # Single Gundrill - Z depth for gundrill at slow speed/feed

fastdrill_speed : 0 # Single Gundrill - Fast / Recommended RPM for Gundrill

retract_feed : 0 # Single Gundrill - retract feedrate

drill_speed : 0 # Gundrill Cycle - Drill RPM

start_hgt : 0 # Gundrill Cycle - Z start height

drill_feed : 0 # Gundrill Cycle - Drill Feedrate

---

Create your postblock in the drilling section of your post...

 

code:

---

 pgundrill                #DLB--------Canned Gundrill Cycle Added 7-31-08

pdrlcommonb # works in conjunction with pmisc2$ and pmisc2_2$

pbld, *pdrlxy, e$

pbld, *start_height, e$

pbld, *slowdrill_speed, "M4", e$

pbld, *sg01, *first_depth, *slowdrill_feed, e$

pbld, n$, "G4", *dwell$, e$

pbld, *fastdrill_speed, "M3", e$

pbld, n$, "G4", *dwell$, e$

pcan1, pbld, *sg01, *pfzout, *feed, *strcantext, e$

pbld, n$, "G4", *dwell$, e$

pbld, *slowdrill_speed, "M3", e$

pbld, *sg01, *start_height, *retract_feed, e$

pbld, *sg00, *initht_a, e$

pcom_movea

---

Change pmisc2 like this...

 

code:

---

pmisc2$          #Canned Misc #2 Cycle   #DLB--------Canned Gundrill Cycle Added 7-31-08

pgundrill

 

 

 

 

pmisc2_2$ #Canned Misc #2 Cycle

#pdrill_2$

pgundrill #DLB--------Canned Gundrill Cycle Added 7-31-08

 

---

Create custom labels for the MC parameter fields...

 

code:

---

[misc2]

1. "Gundrill Canned Cycle"

7. "Slow RPM"

8. "Slow Feed"

9. "1st. Z Depth"

10. "Fast RPM"

11. "Retract Feed"

 

 

 

1. "Custom Drill Parameters 20"

[drill cycle descriptions]

1. "G81/G82 - Drill/Counterbore"

2. "G83 - Peck Drill"

3. "G73 - Chip Break"

4. "G84/G74 - Tap"

5. "G85/G89 - Bore (feed out)"

6. "G86 - Bore (stop, rapid out)"

7. "G76 - Fine Bore (shift)"

8. "Gundrill Canned Cycle"

9. "Subprogram Call"

10. "Probe ID / Bore"

11. "Probe OD / Boss"

12. "Probe X Centering"

13. "Probe Y Centering"

14. "Probe Z Position"

15. "Probe X & Y Centering"

16. "Gundrill - Single Location"

---

[lwells]

Thanks for the info. Shopware said they can hook my up. Happy New Year.

[Matthew Hajicek - Singularity]

I may have to copy that into my post. We're using insert drills in 40 rockwell 15-5 and the tool supplier said we should start at half feed for the first .100". So far I've been hand editing.

[Dave Ball]

Like I said earlier, this code was setup for gundrilling, but with a few tweaks it could easily do what you need.