Re: [Emc-users] 2.7.0 is out!

On 19 October 2015 at 06:39, jrmitchellj . wrote: > Looking at the system monitor, it looks like all tasks are running on the > first core. Can you see RTAI in the system monitor? (I don't know the process name). I seem to recall hearing that isolcpus does lead to RTAI

[Emc-users] Cheap Chinese Spindles?

We had been using Perske VS60.11-2 (7hp) spindles for our routers, but the price keeps going up. they are now about $2700 http://cncpd.com/cnc-parts/perske-vs-series-spindle-motors/perske-vs-60-11-2-480v-7hp-mtc-spindle-motor We had a spindle go bad the other day, and I decided to look at

Re: [Emc-users] Cheap Chinese Spindles?

On 19 October 2015 at 16:15, Todd Zuercher wrote: > Anyone have any opinion on a spindle like this? > http://www.ebay.com/itm/7-5KW-18000rpm-380V-15-5A-Square-Spindle-Motor-ER32-Air-cooled-CNC-Woodworking-/201181719622?_trksid=p2141725.m3641.l6368 >

[Emc-users] Question about G2/G3 where Z and P are used

Greetings all; Can I assume that when a Z# and a P# are used in a G2 or G3 move, that the Z descent per full turn is: Z / P So that depth Z is accomplished in P full circles? The docs only sort of say that, as I read them.

Re: [Emc-users] Cheap Chinese Spindles?

Hi, I replaced Persce spindel by a cheaper alternative as well. We are using various spindles (2 kW to 8 kW water cooled with ATC) vom HSD for several years now and so fare the work very well. One of these might be a suitable replacement: http://www.hsdusa.com/viewdoc.asp?co_id=390 If noise

Re: [Emc-users] Cheap Chinese Spindles?

Well, the old Perske motors are 7hp and air cooled, and their fan is rather pathetic, I suspect they get more cooling from conducting heat through the machine mounts, than from the forced air from the fan, plus they are mounted in the dust collection airstream. We also have some much larger

Re: [Emc-users] Question about G2/G3 where Z and P are used

Hi Gene, That's correct. The P word controls how many turns, independent of the z height. Rob On Mon, Oct 19, 2015, 10:29 AM Gene Heskett wrote: Greetings all; Can I assume that when a Z# and a P# are used in a G2 or G3 move, that the Z descent per full turn is: Z / P

Re: [Emc-users] Path blending

On Monday 19 October 2015 19:48:31 Robert Ellenberg wrote: > Depending on your machine's acceleration, and the feed you requested, > that could be correct default behavior. The default blend tolerance is > unlimited. Given the speed limitations the TP used to have, it may not > have been able to

[Emc-users] Path blending

Greetings all; I was just forced to add a G64 P0.001 to my code for making the screw shank, a circular cut just deep enough to absorb the screw head, topped by a square cutout with 1/16" radius corners as left by a 1/8" mill run in a square pattern. Without it, that square pocket was turned

Re: [Emc-users] Cheap Chinese Spindles?

On Monday 19 October 2015 11:15:48 Todd Zuercher wrote: > We had been using Perske VS60.11-2 (7hp) spindles for our routers, but > the price keeps going up. they are now about $2700 > http://cncpd.com/cnc-parts/perske-vs-series-spindle-motors/perske-vs-6 >0-11-2-480v-7hp-mtc-spindle-motor > > We

Re: [Emc-users] Question about G2/G3 where Z and P are used

On Monday 19 October 2015 19:34:31 Robert Ellenberg wrote: > Hi Gene, > > That's correct. The P word controls how many turns, independent of the > z height. > > Rob Thanks Rob, for confirming what I experiments seemed to indicate. > > On Mon, Oct 19, 2015, 10:29 AM Gene Heskett

Re: [Emc-users] 2.7.0, new trajectory planner, lost it's perfect pitch

Tom, have you tried playing with the ARC_BLEND_RAMP_FREQ parameter in your ini file? Increasing it from the default value of 20Hz up to 100Hz or even 1000Hz will make the trajectory planner more aggressive on short segments, at the expense of more acceleration ripple for programs with lots of

Re: [Emc-users] Path blending

Depending on your machine's acceleration, and the feed you requested, that could be correct default behavior. The default blend tolerance is unlimited. Given the speed limitations the TP used to have, it may not have been able to go fast enough to need a big blend like that, so you might not have

Re: [Emc-users] 2.7.0, new trajectory planner, lost it's perfect pitch

I will give that a try Rob, I don’t think it is in my ini file at all IIRC. My acceleration on the Z axis was set quite low so I brought that up to something reasonable today and it helped. Though again, it is a direct comparison as those have been my settings under the previous (2.4-2.6)

Re: [Emc-users] Path blending

On Monday 19 October 2015 21:59:36 Robert Ellenberg wrote: > Hi Gene, > > I just set up a sim config with the same axis vel / accel limits, and > ran your code at 200% feed override in G64 P0: > > http://imagebin.ca/v/2JdzAY0jhjp4 > http://imagebin.ca/v/2JdylG3HDyLx > > It looks like the culprit

Re: [Emc-users] Path blending

Hi Gene, I just set up a sim config with the same axis vel / accel limits, and ran your code at 200% feed override in G64 P0: http://imagebin.ca/v/2JdzAY0jhjp4 http://imagebin.ca/v/2JdylG3HDyLx It looks like the culprit is a combination of the 200% maximum feed override and the comparatively

Re: [Emc-users] 2.7.0, new trajectory planner, lost it's perfect pitch

On Mon, Oct 19, 2015 at 11:30:14PM +, Robert Ellenberg wrote: > would you mind sharing the g-code so I can > take a look at the slow spots? A version of this program is in the sample nc_files as "daisy.ngc". It needs to be modified to run on a 3-axis machine, and only "sounds good" on a

Re: [Emc-users] Cheap Chinese Spindles?

On 19 October 2015 at 16:15, Todd Zuercher wrote: >> Anyone have any opinion on a spindle like this? >> http://www.ebay.com/itm/7-5KW-18000rpm-380V-15-5A-Square-Spindle-Motor-ER32-Air-cooled-CNC-Woodworking-/201181719622?_trksid=p2141725.m3641.l6368 >> for 1/3 the price