Messages

701

General Mach Discussion / Re: machine is out by .5mm in x and y axis even after setup

« on: March 02, 2017, 09:39:04 AM »

I would not connect two motors to one drive - just sounds like a bad idea *unless* the drive is specified as being capable - i do not know any that are.

What control board do you use - to slave properly you generally need a 4axis board *but* some boards can take two drives on one axis ok.

You would normally have a motor connected to each drive and each drive connected to the break-out board which is then connected to Mach3 and Mach3 is set as slave X&A or Y&A etc

702

General Mach Discussion / Re: machine is out by .5mm in x and y axis even after setup

« on: March 02, 2017, 08:13:18 AM »

Its always best to calibrate over the longest distance possible.

Does the axis just "thump" or does it keep moving??

If it thumps and stops thats pretty normal for stepper motors, if it keeps ,moving thats not right.

703

General Mach Discussion / Re: machine is out by .5mm in x and y axis even after setup

« on: March 02, 2017, 05:14:21 AM »

Did you only set the the steps per over a 10mm distance ??

I would try again using a good steel rule or measure over a long distance say 900mm or more.

Unless it is losing steps but too early to show that i think, it must be calibrated 100% first.

Is this wood router?

Maybe also the tool is 0.25mm off-size, depends how good the tool is but is possible

704

General Mach Discussion / Re: pecking to machine plastic and rubber

« on: February 28, 2017, 08:08:57 AM »

That would snap the drill ??

Theres no secret, the code is basic in-out, in-out in whatever axis you like, it just goes a little further each time- pecking away at the material.

For deep holes you might want the full retract, especially in sticky muck like aluminium so the drill flutes have time to clear, then you dive back in and drill some more and then retract again to clear.

I think for your plastics, a simple short retract might work so...

G1 Z-1.5 - in to 1.5mm
G0 Z-1.0 - back 0.5mm
G1 Z-3.0 - in to 3mm
G0 Z-2.5 - back 0.5mm
G1 Z-4.5 - in to 4.5mm
G0 Z-4.0 - back 0.5mm

Clearly as the hole gets deeper it gets slower if using a full retract but the short version only goes back a little way so is faster.

705

General Mach Discussion / Re: pecking to machine plastic and rubber

« on: February 28, 2017, 06:24:22 AM »

Ok, pecking is simple - here is a chunk of my code from Vectric, it drills a hole at X0 Y0 to 4.5mm deep with a rapid retract to +0.5mm each peck.

Code: [Select]

N100 G00 G21 G17 G90 G40 G49 G80
N110 G71 G91.1
N120 T2 M06
N130 (T2 - 5mm Carbide YG)
N140 G00 G43 Z20.000 H2
N150 G00 Z20.000
N160 S12500 M03
N170 M07
N180 (Toolpath:- Drill 1)
N190 ()
N200 G94
N210 F550.0
N220 G00 X0 Y0 Z20.000
N230 G00 X0 Y0 Z2.000
N240 G01 X0 Y0 Z-1.500 F300.0
N250 G00 X0 Y0 Z0.500
N260 G01 X0 Y0 Z-3.000 F300.0
N270 G00 X0 Y0 Z0.500
N280 G01 X0 Y0 Z-4.500 F300.0
N290 G00 X0 Y0 Z20.000
N300 G53 G0 Z0.000
N310 M05
N320 M09
N330 G54
N340 M30
Obviously you need to feed in your speeds and feeds.

This code is more of a deep-hole full-retract type drilling, for a simple chip-breaker, modify the retract lines to just pull the Z back up maybe 0.5mm from the last cut depth, this maybe enough to break the stringers, may need a little more retract.

706

General Mach Discussion / Re: pecking to machine plastic and rubber

« on: February 28, 2017, 05:40:59 AM »

But where does your G-code come from - could be an application like SheetCam, Aspire, Fusion360 or are you manually writing your code?

707

General Mach Discussion / Re: simple VSD

« on: February 28, 2017, 03:10:00 AM »

Omron is a good make, I would persevere and discover the way to get it going, what specific function or feature are you struggling with?

708

General Mach Discussion / Re: pecking to machine plastic and rubber

« on: February 28, 2017, 03:08:19 AM »

I just choose chip-break drill cycle in my CAM application, what software do you use?

709

General Mach Discussion / Re: Mach 3 slows down at each point

« on: February 28, 2017, 02:25:59 AM »

The fact it got better when speed was lowered makes me wonder what setting you have for acceleration in X & Y ??

Good thats its better though.

710

General Mach Discussion / Re: pecking to machine plastic and rubber

« on: February 27, 2017, 02:11:59 PM »

A "chip-breaking" peck cycle should help break the stringers up, may be called chip-break, partial-retract pecking etc.