Re: [Emc-users] Lost fractions of a step

Microstepping increases resolution but not accuracy, you can easily lose torque in intermediate positions, any stiffness in the rotary will just add error. Perhaps the worst thing I have seen though is rotary error itself, the lower the reduction ratio usually means a greater error from the worm/wh

Re: [Emc-users] Lost fractions of a step

Good year to all, I have a board that can do microstepping but I would not use microstepping because the manual says that while it rises the precision it also reduces the torque. On Sun, 2016-01-03 at 01:02 -0500, Cecil Thomas wrote: > My question is about what happens to the "leftovers" when the

[Emc-users] Lost fractions of a step

My question is about what happens to the "leftovers" when the precision of the g code commanded position cannot be met by the hardware executing it. Several years ago I wrote a program to "generate" involute gear teeth by making multiple cuts of the same tooth from differing angles with a rack

Re: [Emc-users] Rewiring the BP

Before it. Literally run a green wire from the X2 terminal to the single point ground or to the steel backplane assuming you have one. The protective fuse on X1 should be prior to the filter also. Dave On 1/2/2016 7:26 AM, John Thornton wrote: > I do have a "control transformer" which can

Re: [Emc-users] Rewiring the BP

>>None of those seem to have an earthing spike _and_ a neutral to GND link. The top of page 20 shows something very similar to how houses are wired in the US (except that we have two hot wires running into the houses, whereas the diagram shows one) However it appears that the utility supplies th

Re: [Emc-users] Rewiring the BP

Hi John, To me it still looks like you have the 120VAC side of the transformer totally isolated from frame ground. As John Kasunich has also stated it's incredibly dangerous to have that 120VAC voltage floating. One side of the transformer should be immediately connected to Earth (Frame) right

Re: [Emc-users] Waterjet at TX/RX Labs

I had waterjet for 6 years (yes, also retrofitted to LinuxCNC) and I _always_ had the water tank as full as possible - much less splashes around. Nothing like you had in the video. If possible, you might want to try to submerge the workpiece under surface of water - the cutting process is much more

Re: [Emc-users] Rewiring the BP

On Saturday 02 January 2016 07:26:08 John Thornton wrote: > I do have a "control transformer" which can be identified by the three > fuses on top. One for X1 (secondary) and one each for L1 and L2. I > went back and found out which was X1 and X2 and will correct my wiring > today. My question is I

Re: [Emc-users] Rewiring the BP

I do have a "control transformer" which can be identified by the three fuses on top. One for X1 (secondary) and one each for L1 and L2. I went back and found out which was X1 and X2 and will correct my wiring today. My question is I have a filter on X1 and X2 should I ground before or after the

Re: [Emc-users] Rewiring the BP

It is a common practice to send out two hots and one neutral provided the two hots are not on the same phase. This is a copper saving thing On 1/1/2016 7:34 PM, John Dammeyer wrote: > Isn't it commonly called Split Phase in North America? > > Draw 15A on each side of the 120-0-120 VAC circuit

Re: [Emc-users] Measuring Noise - Oscilloscope

I was just curious not needing to compare. On 1/1/2016 5:26 PM, Ben Potter wrote: >> From: John Thornton [mailto:j...@gnipsel.com] >> If you have limit switches set them up to home also, saves time when > firing up as last offsets are still good. Also the soft limits work when you > home. Got a ph

Re: [Emc-users] Rewiring the BP - where to connect ground

On Saturday 02 January 2016 05:52:55 Ben Potter wrote: > > From: Gene Heskett [mailto:ghesk...@wdtv.com] > > > >> Going really OT here (and I should probably start a new thread for > >> this) - what beyond a 1:1 ratio makes a transformer an 'isolation' > >> transformer. > > > >No ohmic connection

Re: [Emc-users] Rewiring the BP - where to connect ground

> From: Gene Heskett [mailto:ghesk...@wdtv.com] >> >> Going really OT here (and I should probably start a new thread for >> this) - what beyond a 1:1 ratio makes a transformer an 'isolation' >> transformer. >> >No ohmic connection between primary and secondary. If there is, and its not just a car

[Emc-users] sourceforge robot upchuck, 8 old list messages, all sent at 1:07 this morning

Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page -- ___