bt35 collet chucks for denford triac

**battwell** · 23-07-2018

i just went through the stuff supplied with the mill- i have 9 assorted tool holders. ( 2 with er collets)
5 were brand new in wax :-)
strange as the pull studs on them were too long- and wasnt claming up tight!
luckily i had correct length pull studs in stock. and now it works well on atc.
still could do with more tooling- i hate having to re set tools!
here is a quick video i took testing the atc code. couldnt work out whether it should retract before rotating or stay in by spindle (never run it on fanuc before converting)
https://youtu.be/C_4gqGdgKas

**m_c** · 23-07-2018

I think I've now got about 15 assorted holders, as my machine came with a good few.

I would prefer a good batch of ER collet holders though, which is something I may try and get quotes on again.

**battwell** · 23-07-2018

your using kmotion on yours arent you?
how did you do spindle alignment for atc? in kmotion or in the servo?
that was one thing that drove me nuts trying to work it all out.

**m_c** · 23-07-2018

Yes, I'm using KMotion.

I never bothered with alignment, as my machine is a later one without the locating dogs.
I do have the spindle servo index pulse connected to the KFlop, so if I did want to implement alignment, it would only involve a couple extra lines of code to rotate the spindle to the required position.

**andy_con** · 24-07-2018

i went to southern engineering 2017 and spoke to some of the stalls selling tool holders, two did say they still had the moulds for bt35, but the demand just wasnt there

**battwell** · 17-08-2018

was just wondering - anyone think it would be possible to machine a conversion sleeve to go in the spindle- bt35 to iso30?
iso 30 collet chucks are rediculously cheap now . i have around 150 for my routers!
if i can find the exact dimensions i might get one of the chinese engineering companies that keep saying how good they are to knock up 10. thoughts?

**m_c** · 17-08-2018

It would probably be easier, and far more reliable, to just buy a new spindle from Denford.

IIRC they're still using the same spindle in their new machines, so it would just be a case of swapping the main spindle, along with any other bits that differ. Then of course you have the problem of converting the ATC.
I'm sure a post on the denford forum would give a definitive answer.