Whatever your Native Units are set to, provided your current mode is the same.
Gecko G203 are 2000 steps/ revolution.
Ok, we have the machine basically functioning...
But, the units of movement are not understood.
Ie, what does the DRO show? mm or inches in
the normal mode with the "Lock DRO" unchecked
in the Configure panel.
The system is set to "mm" in the "Select Native Units"
I have checked tried checking "Lock DRO" to force it
to show "mm" in the DRO, however when measuring
the movement it is not in mm but closer to inches.
The machine is a Omiocnc 60/40 with 5mm ball screws.
We are using Gecko 203's, and those by them selves are
confussing. The title for them on Gecko's site say "native
resolution 10 uStep (2000 PPR), but a side note says
"Need to run your G203V in full step, half step, five microstep or ten microstep?
Click here to view the G901X, which will turn your G203V into a G213V!"
Thus, I am confussed as to will the plane Gecko 203 run at 2000PPR
or does it need the G901X to do this?
I have the steppers set to 10000 steps per millimeter currently.
Hope this is enough info to get something back in the way of an
answer.
Best Regards,
Preston
Similar Threads:
Whatever your Native Units are set to, provided your current mode is the same.
Gecko G203 are 2000 steps/ revolution.
Gerry
UCCNC 2017 Screenset
[URL]http://www.thecncwoodworker.com/2017.html[/URL]
Mach3 2010 Screenset
[URL]http://www.thecncwoodworker.com/2010.html[/URL]
JointCAM - CNC Dovetails & Box Joints
[URL]http://www.g-forcecnc.com/jointcam.html[/URL]
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
Ok Guys,
A bit more confused as when measuring the actual travel of the x,y & z axises
I get a measurement of about 0.192-0.194 inches or about 0.75mm per
revolution of stepper motors.
This to me would equate to 0.00375 mm per step and thus I should set
the Steps per in the Motor config file to 2666 steps per mm.
This is again for setting up a Gecko 203 stepper at 2000 steps per revolution.
Im I on track?
Best Regards,
Preston
Is there a belt drive on the screw?
Gerry
UCCNC 2017 Screenset
[URL]http://www.thecncwoodworker.com/2017.html[/URL]
Mach3 2010 Screenset
[URL]http://www.thecncwoodworker.com/2010.html[/URL]
JointCAM - CNC Dovetails & Box Joints
[URL]http://www.g-forcecnc.com/jointcam.html[/URL]
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
No belt, they are all direct drive.
This is what is throughing me, as the web site
for the Omio 60/40 says that these are 5mm ball screws.
Best Regards,
Preston
Can you post a picture of your machine and/or a link to web page for your machine.
Something is not right.
5mm dia X.8 pitch is threaded rod not ball screws/
.8 step per revolution would be a very slow machine?
Driving 5mm rods with gecko 203's would be serious overkill?
5mm pitch ballscrews would be 400 steps/mm
Gerry
UCCNC 2017 Screenset
[URL]http://www.thecncwoodworker.com/2017.html[/URL]
Mach3 2010 Screenset
[URL]http://www.thecncwoodworker.com/2010.html[/URL]
JointCAM - CNC Dovetails & Box Joints
[URL]http://www.g-forcecnc.com/jointcam.html[/URL]
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
Make sure you set the right units in in Mach configuration page. Then do a calculation on steps/unit, keep in mind you need to keep all the units in the same standard. If you have a motor that is 200 PPR, and a 5MM ballscrew you need to calculate the movement in INCHES. If you have your exact configuration it is pretty easy to calculate. There are even calculators on the web that will do it for you if you put in the motor info, ballscrew info and any gearing if used.
Russ
Ok, my error in converting the measured 0.194 inches to mm.
It should be very close to 5mm, so as stated in the Omiocnc.com specs.
Units in the Mach config page set to "mm"
However, when I set it to 400 steps per mm, the stepper barely moves.
Is the Gecko 203 set to 2000 PPR from the factorywhich would be 10x micro steps or do I need to set some
jumpers.
Best Regards,
Preston
Have not seen the latest Gecko but they used to have some dip switches on the board that set the microstepping. Just go to their site with your model and you will find it pretty quick.
Russ
PrestonSMA,
Here is an example of how the step per unit calculation are done in a mixed environment.
Servo Motor 2500 Pulses/Rev
Ballscrew 5mm so 5mm = .196845 inches 1 / .196845 = 5.08 Turns/Inch
2500 PPR * 5.08 Turns/Inch = 12,700 pulses per inch Note: everything has been converted to be in the same units you plan to use in your configuration.
If you want to be in Metric
Stepper Motor 200 PPR
Microstepping 10x
Ballscrew 5mm line movement of ballscrew in one revolution
1mm = .0393" which is very small
Russ
No, the G203 is 10 ustep only.
If it's not moving much at 400steps/mm, try lowering the acceleration and velocity to make sure that it's not stalling.
Also, be sure to close and restart mach3 every time you make changes.
You may not know this, but you can jog the motor from the motor tuning screen with the up and down arrow keys I think.
Gerry
UCCNC 2017 Screenset
[URL]http://www.thecncwoodworker.com/2017.html[/URL]
Mach3 2010 Screenset
[URL]http://www.thecncwoodworker.com/2010.html[/URL]
JointCAM - CNC Dovetails & Box Joints
[URL]http://www.g-forcecnc.com/jointcam.html[/URL]
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
Ok Gerry, I did not know that one needs to restart Mach after each change in the config.
Yes, I can move the x and y with the arrow keys. Up and down, left and right.
Will try restarting after making any changes in Config from now one.
Best Regards,
Preston
I always just measured my movement and then calculated from that. For example, if I set 2000 steps/mm and I programmed in 100 mm movement, and I only measure 92.03 mm movement, then I need to adjust steps/mm thusly 100/92.03 * 2000 = 2173.2 steps/mm. Repeat and fine tune. I might try different areas of the screw and different lengths travel to find the best fit, unless I am going to map the screw and apply a correction.
Rebuilding my Bridgeport Boss3...