Harmonic drive 4th axis build

German/Dutch border region

Hello Hakan,

can you upload your ini and hal file?
I'm working on a 4 th axis with a FHA40B.
So the ini an hal can help me.
I am a beginner in linuxcnc.

Thanks

I've updated Hakan's code to be based on the latest EMC2 post processor from the Fusion360 library and added a couple of features for the post properties. Also removed the "linear5d" that was written before each line in Hakan's attached code.If you plan to use this post, please test extensively and use at your own risk. 


 

Hello I have test this post. works good, but the Inversetime feed mod doenst work... my axis moves slowly approx 200-300 mm/min. at the adaptiv on the post file.

nc file looks good. but in this lines..




it dont chance back to g94 and runs with G0. at this time he´s fu..... up.
but i see at this line
N81185 X25.975 F1000.
the machine works works G93 F1000 and the machine runs up to 6000mm/min., why the machine runs with G93 F1000 with the 4th axis so slow and with G93 F1000 only X Axis with 6000mm/min?

 
 

Is it possible that the 4th axis maximum speed is very low in the iNI?
Or that rotary feed override is set low?

Hello, here are my ini file...

Rotary feed override? where i can do this?
maximum rotary speed is 14400^/min. so thats 40rpm

 

Sorry, I think that I am misremembering the purpose of the angular velocity sliders, I think that they only affect jogging.

Presumably a G0 in MDI runs the A axis at full speed?

yes at MDI it works fine with g0 it runs 14400^/min.

jog is a problem too, i can jog the b axis only with 100°/min.
im missing a second slider for the b axis, standart slider dont work for b axis only for xyz.

using Probe_Basic

CNC_ANDI wrote:

jog is a problem too, i can jog the b axis only with 100°/min.
im missing a second slider for the b axis, standart slider dont work for b axis only for xyz.
using Probe_Basic

Axis has a slider for rotary too. 
Do you have DEFAULT_ANGULAR_VELOCITY in the INI file? 

If there are combined rotary and linear moves the TP drops back to the old one, which has only single-segment lookahead. If he G0code has lots of small moves then it will tend to be quite slow as the speed is limited to be able to stop at the end of the next segment. 

If you MDI a long angular and linear move you should see the full programmed speed. 

Higher acceleration values might help. 

 

Hi, i´ve posted my ini file.



i´ve tried du play with G64, G64 P, G64 P Q, G61, G61.1..... but always the same.

maybe you can check my acceleration and Angular speed  on my ini?
Nema23 CL 3,6nm 4A at 36V
1605 Ballscrew
2000 steps