[Emc-users] 2 ?'s Spindle control hwto/Double step?

[Alfred Smart]

 Hello
  1. Does anyone have a source of info that I can access to learn how and what 
I need for controlling a machine tool spindle?
  I have searched the net and came up empty.
  I have a Wells Index knee mill running Emc2 and the 80's vintage mill uses 
magnetic starters forward and reverse.
  I would like to explore spindle control for rigid tapping and I also would 
like to retro a lathe with Emc2.
  2. I am curious about double step that Jeff Epler came up with and how it has 
tested out using Gecko drives?
  My setup uses 28000 BASE_PERIOD and a 25000 INPUT_SCALE and it nets me 38 IPM.
  My Dell has a latency of about 18200 and I currently use DIR hold of 2 
Periods to get the 20us hold time required by the Gecko drive.
  The rapid speed isn't a great big deal to me,but if I can double that I would 
be pleased.
  I have never ran another PC based controller ,Fanuc,Yasnac,Mazatrol,and I 
will be the first to sing the praises EMC2, great job !
   
   Thanks again Al Smart
   

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Re: [Emc-users] 2 ?'s Spindle control hwto/Double step?

[Ed]

Alfred Smart wrote:
  Hello
 1. Does anyone have a source of info that I can access to learn how and 
 what I need for controlling a machine tool spindle?


I have what appears to be a very similar machine, mine is a Model 810 
built in 1980. I have set it up with Gecko 320's and the original PS 
rewired to produce 56 Volts.Currently it is running on EMC2 2.1.6 with a 
fourth axis, coolant control, and spindle control. The EMC gang at the 
CNC Workshop in Galesburg were instrumental in setting up the last two 
items along with a second Par Port. Thanks again to Chris, Steve, 
Jeff,and John for the big help.


 I have searched the net and came up empty.
 I have a Wells Index knee mill running Emc2 and the 80's vintage mill 
 uses magnetic starters forward and reverse.
 I would like to explore spindle control for rigid tapping and I also 
 would like to retro a lathe with Emc2.

You will need an encoder and connections for rigid tapping, check out 
the Mazak setup. I use an extension/compression adapter for non-rigid 
tapping which works just fine for my use. I also have a Hardinge CHNC 
with no control as a retro candidate.



 2. I am curious about double step that Jeff Epler came up with and how 
 it has tested out using Gecko drives?
 My setup uses 28000 BASE_PERIOD and a 25000 INPUT_SCALE and it nets me 
 38 IPM.


My machine is running with an Athlon 700 processor through 2 Par Ports, 
at 56 Volts I can get 72 IPM at a high acceleration with the Gecko's. 
What speed processor do you use?



 My Dell has a latency of about 18200 and I currently use DIR hold of 2 
 Periods to get the 20us hold time required by the Gecko drive.
 The rapid speed isn't a great big deal to me,but if I can double that I 
 would be pleased.
 I have never ran another PC based controller ,Fanuc,Yasnac,Mazatrol,and 
 I will be the first to sing the praises EMC2, great job !
  
  Thanks again Al Smart

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