Harmonic drive 4th axis build

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02 Sep 2019 21:08 #143952 by opw
Replied by opw on topic Harmonic drive 4th axis build
German/Dutch border region

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02 Apr 2020 09:50 - 02 Apr 2020 10:33 #162438 by Sviper
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
Last edit: 02 Apr 2020 10:33 by Sviper.

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17 Jan 2022 19:06 #232163 by Eyecon
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. 


 

File Attachment:

File Name: linuxcnc_4..._new.zip
File Size:13 KB
Attachments:

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12 Jan 2023 19:18 - 12 Jan 2023 19:54 #261728 by CNC_ANDI
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..


N81110 G94 Y-3.029 F1000.
N81115 G93 B-982.046 F269.4382
N81120 G0 Z31.
N81125 G49
N81130 M9
N81135 M500
N81140 G53 G0 Z0.
(2D-KONTUR2 2)
N81145 M600 T11
(10MM 2-SCHNEIDER)
N81150 M300 S16000
N81155 G0 B0.
N81160 M8
N81165 G0 X-25.974 Y-36.485
N81170 G43 Z31. H11
N81175 G0 Z21.
N81180 G1 Z15. F1100.
N81185 X25.975 F1000.
N81190 Z14. F1100.


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?

 

File Attachment:

File Name: 1001_2023-01-12.ngc
File Size:1,192 KB

 

File Attachment:

File Name: linuxcnc_4..._new.rar
File Size:14 KB
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Last edit: 12 Jan 2023 19:54 by CNC_ANDI.

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14 Jan 2023 11:00 #261918 by andypugh
Is it possible that the 4th axis maximum speed is very low in the iNI?
Or that rotary feed override is set low?
The following user(s) said Thank You: CNC_ANDI

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14 Jan 2023 12:49 #261937 by CNC_ANDI
Hello, here are my ini file...

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

 

File Attachment:

File Name: CNC-ANDI_2...1-14.ini
File Size:8 KB
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14 Jan 2023 18:24 - 14 Jan 2023 18:25 #261968 by andypugh
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?
Last edit: 14 Jan 2023 18:25 by andypugh.

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15 Jan 2023 11:03 #262030 by CNC_ANDI
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

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15 Jan 2023 20:16 #262058 by andypugh

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. 

 

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15 Jan 2023 20:39 - 15 Jan 2023 20:54 #262059 by CNC_ANDI
Hi, i´ve posted my ini file.

File Attachment:

File Name: CNC-ANDI_2...1-15.ini
File Size:8 KB


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
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Last edit: 15 Jan 2023 20:54 by CNC_ANDI.

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