Can't get lathe to Feed

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5 years 1 month ago #221087 by rider-83
Replied by rider-83 on topic Can't get lathe to Feed
Andy,
I don't know if you have seen my other thread, but since my latest update in order to obtain 'missing-teeth' I've run into allsorts of frustrating issues with Gmoccapy.
However, that said, I've managed to work out a way to get the system up and test the 'missing-teeth' with a G71 call.
We no longer have the errors reporting missing pins etc, and I can run the CNC program.
The spindle starts but the tool sits there presumably waiting for its strobe signal to start screw cutting. Any ideas?

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4 years 5 months ago - 4 years 5 months ago #242022 by virencq
Replied by virencq on topic Can't get lathe to Feed
I have weared situation. mine G95 working. But at 1200 spindle speed .3 mm/rev, 20 mm dia at 80 SMM. taking 3 minutes to complete 100 mm.
Theoritacly it should complete in 16.67 sec.
Please correct me if I am wrong
Last edit: 4 years 5 months ago by virencq.

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4 years 5 months ago - 4 years 5 months ago #242029 by virencq
Replied by virencq on topic Can't get lathe to Feed
Mission accomplished in 3 hrs.
Last edit: 4 years 5 months ago by virencq.

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4 years 5 months ago #242080 by andypugh
Replied by andypugh on topic Can't get lathe to Feed

I have weared situation. mine G95 working. But at 1200 spindle speed .3 mm/rev, 20 mm dia at 80 SMM. taking 3 minutes to complete 100 mm.
Theoritacly it should complete in 16.67 sec.
Please correct me if I am wrong
You are not wrong. 

So, perhaps your spindle encoder scale is wrong?

Of you open a halmeter and look at spindle.0.revs, then manually turn the spindle by 1 turn, does it increase by exactly 1.0? 

 
The following user(s) said Thank You: virencq

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4 years 5 months ago #242227 by virencq
Replied by virencq on topic Can't get lathe to Feed
G95 working, feed and finish ok.
Threading not working as it should be. 

File Attachment:

File Name: spindle.hal
File Size:1.74 KB

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4 years 5 months ago - 4 years 5 months ago #242229 by virencq
Replied by virencq on topic Can't get lathe to Feed
Andy Sir, as per your suggestions Hal-meter shows 1.05 for 1 complete revolution.
After changing encoder scale 100.000 to 100 now it shows 1 for 1 spindle turn manualy.
From my spindle.hal 

encoder.0.velocity throws fluctuated numbers in halshow. so I used spindle.0.speed-out-rps with spindle.0.speed-in.


that makes my feed mm/rev usable.
But when I run threading macro G76 with 2 mm pitch. threads are very fine.

 
Last edit: 4 years 5 months ago by virencq.

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