Modified Drive (old method,) move to positive on failure

Have an idea how to make KryoFlux even better? Let us know...
ZrX
Posts: 241
Joined: Tue Dec 06, 2011 9:09 pm

Re: Modified Drive (old method,) move to positive on failure

Post by ZrX » Mon Mar 13, 2017 7:34 am

It should do a single seek in and out and report 0 or so, but not move below track 0 again.

It's the only drive on the cable?

And everything still works normally if the head doesn't stop below 0?

Pheonix
Posts: 27
Joined: Sat Nov 13, 2010 8:16 pm

Re: Modified Drive (old method,) move to positive on failure

Post by Pheonix » Mon Mar 13, 2017 8:54 am

Yes, it works normally as long as it doesn't stop below 0. What it seems to be doing is a seek 0, which automatically moves the head out until the track 0 sensor trips. Only, since the head is already past 0, it will never hit the sensor, so it just bounces on the physical block, I would assume 79 times (or less, if it had room to move in the first place.) What I have to do, is reach in and shove the head towards the front of the drive during this. Then I have it do another seek to 0 (which then resets it correctly.) I can only do this when the head is trying to move, though. The entire process makes me a bit nervous, really. I don't know how easy it is to mess up a drives alignment. Though, I imagine that seeking to the track 0 sensor would set the alignment each time, and aligning the drive would involve adjusting the location of the sensor. I don't "know" this, though. So, it makes me nervous.

rcade
Posts: 65
Joined: Mon Nov 21, 2011 5:21 pm

Re: Modified Drive (old method,) move to positive on failure

Post by rcade » Sat Mar 18, 2017 8:57 pm

I thought part of the mod was to extend the "arm" that trips the track 0 sensor so that when below 0, it always is still reporting track 0 via the sensor. At least mine is that way...
-
Pete Rittwage
C64 Preservation Project
http://c64preservation.com

ZrX
Posts: 241
Joined: Tue Dec 06, 2011 9:09 pm

Re: Modified Drive (old method,) move to positive on failure

Post by ZrX » Sat Mar 18, 2017 10:12 pm

Ah indeed. Is there anything glued to the black plastic part that slides between the sensor?

Pheonix
Posts: 27
Joined: Sat Nov 13, 2010 8:16 pm

Re: Modified Drive (old method,) move to positive on failure

Post by Pheonix » Sun Mar 19, 2017 12:05 am

Mine was modified with the original method. If I remember, and understand, it correctly.. It would actually disable the sensor briefly after seeking to 0 allow the stepper motor to step past track 0 however many tracks below zero (usually -8,) you set it to. Then it would read, step, read, step, etc.. until it had reached zero again. At which point, it would turn the sensor back on and start reading normally from 0 and above.

ZrX
Posts: 241
Joined: Tue Dec 06, 2011 9:09 pm

Re: Modified Drive (old method,) move to positive on failure

Post by ZrX » Sun Mar 19, 2017 11:33 am

If the bit extending the sensor blocking part is missing you'll have problems.

Post Reply

Who is online

Users browsing this forum: Hok of Remember and 1 guest