Messages

121

General Mach Discussion / Re: What Steps/ Units Settings for Z-axis (Quill) of CNC Retrofitted Radial Machine?

« on: June 27, 2010, 03:07:35 AM »

Here is the updated pictures of spindle housing being machined on Boring Mill and the completed tube sheet.

122

General Mach Discussion / Re: What Steps/ Units Settings for Z-axis (Quill) of CNC Retrofitted Radial Machine?

« on: June 27, 2010, 01:32:35 AM »

Hi Hood ,
I have now to enlarge these 8mm holes to 9.5mm... Now I am going to do it with Standard Drill Cycle (G81).. Is it right? what mm/min i should travel the drill and at what RPM?
Regards

PS:
or anyother suggestions for 9.5mm holes.!!!

123

General Mach Discussion / Re: What Steps/ Units Settings for Z-axis (Quill) of CNC Retrofitted Radial Machine?

« on: June 26, 2010, 01:27:24 PM »

Started building new Spindle and its houseing.. The Spindle is off AISI 4140 hardened to 55HRC... and now it require grinding... The Vertical column is also in fabrication phase.. I will get red of complete Radial drill except the Cross-slides..
The New column is very sturdy..

124

General Mach Discussion / Re: What Steps/ Units Settings for Z-axis (Quill) of CNC Retrofitted Radial Machine?

« on: June 26, 2010, 12:58:46 PM »

Looks to be working well

Think I would be spinning slower and feeding harder though.

Hood

Yaa.. The system is working well now... Following is my experience:

1- The HSS drill failed on the Second hole... I kept the RPM 800 and G73 cycle with Peck 6mm.. It simply toasted;) Flood coolant was On... 2min/hole

2- The second bit is used was Carbide, It ran for 30 holes and then suddenly break into 3 pieces... Again G73 peck cycle but with 2.5mm peck... 2 minute/hole

3- I then used  HSCO drill and with G83 Cycle, lost it after 38th hole with 2.5mm peck... Coolant on.. 7minute /hole

4- Keeping all above experience in view, i again used HSCO drill but at this time G83 with 2mm peck (DOC) and after each 15 holes i sharpen the drill.. For this i added tool change command after each 15 holes in my Gcode.. i slightly changed the Gcode for downtime...
The above strategy went very good and i did above 100holes without breakage... 5minute /hole

5- I have HSS drills available, so i tried the same G83 cycle with them with 2mm peck and sharpening after each 15 holes..and i did 50 holes without loosing HSS drill.. 4.5min /hole

I have done 224 holes in 16.8 hours.

125

General Mach Discussion / Re: Advice for Servo and Controller for this radial Drill Machine

« on: June 26, 2010, 12:48:58 PM »

This is a very Nice suggestion Hood... For this i would have to complete the bed first and then phisically measure the torque... Thanks for posting.

126

General Mach Discussion / Re: What Steps/ Units Settings for Z-axis (Quill) of CNC Retrofitted Radial Machine?

« on: June 23, 2010, 05:20:54 AM »

I have started drilling SS-316 tube sheet 30mm thick:
Spindle RPM: 800
Feed: 1 IPM
Peck drill Cycle: Deep Drill
2.5mm cut per Peck
The drill retract above the work piece after each 2.5 depth cut.

HSCO drill: 8mm

After 37 holes contineously , Without sharpening the tool.. The drill break down on 38th hole..
Now after each 20 holes i am planning to sharpen the drill.
Time to complete One hole 30mm deep: 7Minutes

127

General Mach Discussion / Advice for Servo and Controller for this radial Drill Machine

« on: June 22, 2010, 12:25:28 PM »

Hi,
I need advice from you guys for converting the Radial Drill Machine to CNC...  As i have no experience with Servos..and especially converting this machine is a big job for me..and it bad experience will get my carrier down... But i will take the risk with the help of you guys..
I figured out the length of BED= 1800mm x 1600mm
Also the Weight of the bed it has to carry = 2000Kg

I checked that the Motor at the Top of the Column is 3 Phase 2 KW AC motor.. and it can raise the whole ARM along with the Heavy spindle with 70IPM ...I have seen this.. About Diameter: 2 inch ACME screw get the whole Arm Load up and down very easily..


Should 2.2KW AC servos at all 3-axis will work or enough for me?.. I have not to raise the Arm up and down... I have just to move the spindle up/down..The Whole Spindle lateral movement (X-axis) and the Bed as a Y-axis..

Best Regards for help...

128

Building or Buying a Wood routing table.. Beginnners guide.. / Re: More On Motors...

« on: June 22, 2010, 12:01:01 PM »

keep continuing..very nice writeup..

129

Show"N"Tell ( Your Machines) / Re: Got My mill running :)

« on: June 22, 2010, 11:46:22 AM »

Wish to see the video that is not working now!!!!

130

General Mach Discussion / Re: Help with macro with two macros inside. Cnc embroidering project

« on: June 12, 2010, 09:29:01 AM »

I must say Rene is genious.. I wish i have time for working with him... hi, Rene once your working completed i will make the changes in Gcode embroidery software..

Currently very busy in other projects...