Welcome to LinuxCNC.org

I am in the middle of retrofitting an EMCO PC Turn 55 to runing EMC2. I am using a G540 for control and a VFD to run the spindle motor. Both axis move and EMC controls the spindle just fine with M3 and S commands.

I have questions in several areas.

1) I set the spindle control in stepgen to 0-2000 which is the middle speed. I need to know what options exist for the other 2 belt postions. Some reading indicates that I mighe be able to add buttons to the side of the display for the speed ranges. Is that the best way?

2) The spindle has an encoder. I connected the index pulse to the G540 input 1 and programmed that accordingly. How do I get the actual speed displayed on the computer screen? Which leads me to another question. Is there a way to link the actual speed to the programmed speed? For example, when I set S=1000 EMC just ouputs 5 volts to the VFD. THis would be 500 RPM on one belt postion but 1500 on a different belt position. With this type of configuration, EMC would automatically adapt to belt position.

3) RIght now I have the tool turret under manual control. Surely somebody out there has figured out how to control the EMCO turret using the stock interface and motor???

Thanks, Please point me in the right direction and push the start button!.

chuck

chuck1024 wrote:Optical sensing of the actual belt position might be more elegant.Yes, there is a "gearchange" HAL component intended for this, but the current version only handles 2 ratios.
A few people have written multi-ratio versions (including me) but none have made it into the release version.
One of them is here: article.gmane.org/gmane.linux.distributi...l/4235/match=spindle
You can compile and install that with comp: www.linuxcnc.org/docview/html/hal_comp.htmlI think it is the same as the Boxford one, so this ought to work:
www.linuxcnc.org/index.php/english/compo...iew&catid=47&id=9694

I would like to try the standard 2 speed version before attempted the custom multi speed.
I looked all through the docs but I cannot find it. How about a pointer ?
thanks
chuck

chuck1024 wrote:
www.linuxcnc.org/docview/html/man/man9/gearchange.9.html

I think that the example in classic ladder might be a good fit for the Emco tool changer. Sadly many of the diagrams are dead.

wiki.linuxcnc.org/cgi-bin/wiki.pl?ClassicLadderExamples

I can read the gear change man page, but I don't have a clue were to start..

I did manage to implement Big Johns "tool change" in Hal examples.

chuck

Which diagrams are you referring to ? I see the ladder diagrams.