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Messages - Davek0974

681
General Mach Discussion / Re: Mach 3 motor tuning
« on: March 17, 2017, 03:14:48 AM »
Sounds like a good starting point, enter that then run the auto set feature in Mach3 to get the setting perfect.

682
General Mach Discussion / Re: Mach 3 motor tuning
« on: March 16, 2017, 11:39:15 AM »
Yes you have 600 steps to turn big pulley 1 revolution if the ratio is 3:1

Now we need to know the pitch diameter of the small pinion - how far does it move for 1 revolution????

And also your micro-stepping settings on the drives.

683
General Mach Discussion / Re: Mach 3 motor tuning
« on: March 15, 2017, 09:23:33 AM »
Set the distance or steps per first - do this approximately by calculating the ratio between motor and axis, enter this in tuning, set speed to say 1000mm/min and accel to 100mm/s/s

Next get the distance accurate by using auto calibrate on Mach diagnostic screen (i think) - enter a distance, mach will move, then measure the actual distance it moved and accept the result - use a big distance if you can accurately measure this - a good steel rule or accurate measure is needed, the bigger the distance the better.

Then tune your motor speed, do this by increasing the speed in tuning in steps of say 500mm/min until the motors start skipping when doing a rapid jog - be careful if you have slaved motors or you can rack(twist) your gantry.

each time you increase speed, increase acceleration by 1/10 so if speed is 5000 then acc is 500.

Once it skips, reduce the number by say 20% and try it - if it works well and keeps position then all is well.

Next you try upping the acceleration until it screams at you or loses steps - then back off again.

The two are sort of inter-related but not directly :)

Eventually you will find a sweet-spot for your machine but once set you should never need to change steps-per unless you alter the drive system.

684
General Mach Discussion / Re: Mach3 on a laser cutter...
« on: March 14, 2017, 05:50:42 AM »
Yeah, musty admit that a laser cutter is probably every adult kid's dream toy :)

Prices are silly now and i'm sure my business needs one, just have to figure out why later.

Speeds seem to be pretty fast, 1000mm/s not unheard of.

Hopefully be here next week.

685
General Mach Discussion / Mach3 on a laser cutter...
« on: March 13, 2017, 02:10:38 PM »
I have got a laser cutter on the way ;)

No intention of a refit (yet) but just wondering how Mach plays with a laser cutter -

Is it fast enough?
Does it do PWM power control?
Is it better than the built-in controllers found on eBay laser cutters?
Anyone running a 50-60W laser on Mach3?

Just thinking ;)

686
General Mach Discussion / Re: RPM / Feed Rates Again?
« on: March 13, 2017, 03:29:35 AM »
I would go get a demo copy of HSMAdvisor - it takes into account tool flex, torque and much more, i use it all time and its been good so far:)

No connection, just a happy user.

687
General Mach Discussion / Re: Auto Tool Length
« on: March 12, 2017, 02:50:05 PM »
Pictures ;)

688
General Mach Discussion / Re: Mac3 software
« on: March 09, 2017, 06:08:24 AM »
Did you remember to press "Save Axis Settings" before changing the tab/screen??

690
General Mach Discussion / Re: Somethings wrong here
« on: March 07, 2017, 12:39:54 PM »
Sounds like your work reference point is wrong.

i.e. When the part was drawn, x0,y0 was bottom right corner, on the machine x0, y0 is bottom left corner

or the work zero ref was not set at the same point as the part was drawn for :)

Its a work origin thing i think