Hi John,
The encoder is 4096 counts/rev. Using Mesa Ethernet hardware with servos
so no BASE_PERIOD. SERVO_PERIOD is the default 1ms.
I've never had a problem cutting threads in normal use. Even when taking
multiple tries to dial in a thread it always tracks perfectly.
Les
On 05/02/2021 17:18, John Dammeyer wrote:
Thanks Les. That's good to know. What's the resolution of your spindle
encoder? How are you detecting this with LinuxCNC? A MESA card or PP? What's
the BASE_PERIOD and the SERVO_PERIOD set in the INI file?
Thanks
John
-----Original Message-----
From: Les Newell [mailto:les.new...@fastmail.co.uk]
Sent: February-05-21 8:07 AM
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] Spindle speed changes with threading.
I just tried it on my lathe. I scratch cut a coarse pitch thread at low
spindle speed then repeated the cut at about twice the spindle speed. I
ended up with two distinct threads. The moral of the story is to make
sure your spindle speed is stable before starting threading.
Les
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