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Author Topic: Newbie Help Please to a Stupid Question about Feedrates  (Read 3433 times)

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Newbie Help Please to a Stupid Question about Feedrates
« on: June 04, 2012, 08:24:33 AM »
After a tremendous quantum leap in knowledge and a huge learning curve I am almost ready to put my efforts to work in drilling lots of PCB's. I am using the Nesting Wizard which Mr Hood pointed me to. I have created several Nest routines which will hopefully drill six boards per pass then I need to change the bit to go over the same six drilling the larger holes. - I am really pleased with my efforts but once again I need a little help.
The feed-rate at which the bits drill needs to differ, so in my wisdom (or folly!) I created my nested routine for the 1.3mm holes as:

Y34.2000X11.7560F200
Z-2.5000F100
Z-6.4000F25
Z3.0000F200
M99

The logic being to drop the bit 2.5mm at 100% rate (I think this is called the plunge rate) then drill at 25% then withdraw at full rate. Well to me it sounds good, but it doesn't bleedin well work.  What the Hell am I doing wrong?

Secondly, is there any way to have Mach3 inform me that a tool change is needed? I have put M6 T(n) onto the top of each Nested Routine. The T(n) in this instance is Tool 3 being a 1.3mm bit.

Once again all help and comments are appreciated (apart from abuse and violence !)   
 
God created Ale to make us all happy ..... 8)
Re: Newbie Help Please to a Stupid Question about Feedrates
« Reply #1 on: June 07, 2012, 04:20:30 PM »
Well, thanks for the help guys - I eventually managed to fathom it out myself.
God created Ale to make us all happy ..... 8)

Offline Hood

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Re: Newbie Help Please to a Stupid Question about Feedrates
« Reply #2 on: June 07, 2012, 04:47:29 PM »
Strange, I replied to this the last day, must have got lost when the forum went down. Good you got there anyway :)
Hood
Re: Newbie Help Please to a Stupid Question about Feedrates
« Reply #3 on: June 07, 2012, 04:55:20 PM »
Thanks for that, I found that G1Z and G0Z worked out fine.

G1Z-2.5000F100 (Drop to drill hight at100%)
G1Z-6.4000F25   (Drill at 25%)
G0Z3.0000F200  (Withdraw at full pelt!)
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Offline Hood

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Re: Newbie Help Please to a Stupid Question about Feedrates
« Reply #4 on: June 08, 2012, 03:21:08 AM »
In my reply that never appeared I asked what spindle speed,  size/type of  drills and material you were drilling as your feedrates seem very low.
Hood
Re: Newbie Help Please to a Stupid Question about Feedrates
« Reply #5 on: June 08, 2012, 04:44:20 AM »
I hope to be using Drills and Mills between 0.5mm and 6mm. My machine is quite small with a table size of 300 x 500 with the maximum gantry height of 80mm.
« Last Edit: June 08, 2012, 04:46:05 AM by Buggalugs »
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Offline BR549

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Re: Newbie Help Please to a Stupid Question about Feedrates
« Reply #6 on: June 08, 2012, 11:47:03 AM »
Ever thought about using a canned drill cycle ???

(;-) TP
Re: Newbie Help Please to a Stupid Question about Feedrates
« Reply #7 on: June 08, 2012, 02:48:11 PM »
Mmmmm...

That's a new one. Never been 'Canned' before!

Stoned, Hammered, Wellied, and absolutely off my face, but never 'Canned'  :o

Seriously now, that sounds interesting. I think I have seen that in the Wizard thing, I'll give it a try and find out what it does.

Thanks for that.
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Offline Hood

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Re: Newbie Help Please to a Stupid Question about Feedrates
« Reply #8 on: June 08, 2012, 04:06:29 PM »
Look in the Mach manual, it will give you the info for using with the canned cycles for drilling.
Hood

Offline RICH

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Re: Newbie Help Please to a Stupid Question about Feedrates
« Reply #9 on: June 09, 2012, 08:11:09 AM »
There are some canned cycles that can be found in Members Docs.
RICH