Messages

211

Mach4 General Discussion / Re: Huge feedrate error

« on: June 12, 2016, 08:26:18 PM »

there is a post on the affect of each Gcode run type I will find it and post it. it's from one of the mach guys

212

Mach4 General Discussion / Re: script and mach 4

« on: June 09, 2016, 09:28:04 PM »

mdi you need cycle start enter does not work that was Mach3

213

Mach4 General Discussion / Re: Egg shaped holes

« on: June 05, 2016, 08:17:36 PM »

yer but something is a problem in M4 you need to test everything other wise you may never find the problem, what ever is wrong may only show up in M4, sort of testing everything how are you going to find it.

mach 4 is faster than Mach3 i had to up the look ahead and the acc for it to work as good as Mach3 did I tested everything to find these two things, it did not take long to find as I went through everything

214

Mach4 General Discussion / Re: Egg shaped holes

« on: June 05, 2016, 07:20:53 PM »

nosie can do it it as well, it took me 4 years to track down every problem with my big machine, nosie was the worst problem, and it was the dust extractor pipe being to close to the power plug. and the power wires to close to the signal wires. it would make the machine do all sorts of strange things.

so just run a test on each axis say a lot of moves on one axis at a time if they are on point move on to the next axis that will take the motors and motor wires out of the posabile problem list, doing one thing at a time makes it faster

215

Mach4 General Discussion / Re: Egg shaped holes

« on: June 05, 2016, 06:37:09 PM »

start and stop speed if that is bang on you don't lose steps if it out on one axis you can lose steps on a axis.

say x and y get to a spot in space and Z has not got there yet (potion 1) x and y can go to the next spot in time and Z catches up (potion 2) Z should not have it would of mist steps in potion 1 to get to potion 2, if all axis's get to a spot at the same time there will not be lost steps.

by have the acc at a rate that it get's a axis to stop and start in a smooth fast way. if you move Z to 100 and it is at 100 fine then go back to 0 then it's at 0 it looks all good, if you do the same move 1000 times it may not be back at zero because it may have been out by 0.0001 and what you measure with only shows 0.000, after 1000 moves it may sow 0.01 + or - then 10000 moves it will be at 1.
what you wont is at 1000 moves to be looking the same as 1 move. it's how I do it and it works on one machine.
if it is + or - 0.001 at one move you wont + or - 0.001 at 1000 moves

216

Mach4 General Discussion / Re: Egg shaped holes

« on: June 05, 2016, 01:26:30 AM »

mines open loop to accl what works well, how I do it is I turn all but one axis off run the code to it's good then do the other axis just one at a time for me X and Y are quite quick to do Z can take hours but Z has a problem that is going to cost some money to fix. this works for me on one off the machines I have, on the other one It does not need done one is chines crap the good one is German   

217

Mach4 General Discussion / Re: Egg shaped holes

« on: June 04, 2016, 07:00:10 PM »

because the program is faster but use the same trajectory planner as M3, I had the acc a lot higher in M4 than M3, tuning the acc was the only way I could get it to cut well in 3D cuts 0.001 mm over a 1000 moves. if I did not tune it it was all over the show with 3D cuts, 2D where fine but are even better, it's doing the 2.5D, 3D where you can have problems.

218

Mach4 General Discussion / Re: Egg shaped holes

« on: June 04, 2016, 01:59:31 AM »

Backlash is a ********* to use try doing some test holes and each one up the acc, I found if you tune your acc thing work better

219

General Mach Discussion / Re: Bridgeport Knee Mill Conversion?

« on: June 02, 2016, 03:33:25 AM »

add the tool height to your pendent as well, it makes life very easy being able to be right there. ones you use pendents you love them

220

Mach4 General Discussion / Re: Using Modules

« on: May 29, 2016, 08:17:41 PM »

have a look at what popperbear did in his modules they work