Brother TC-225 / TC-229 adventure!

timfaber wrote: I recently also bought a Brother TC-225, and have been reading this post with great joy. The question that comes to mind is: how bad is this tuning imperfection really in practice? Reason I want to know is that I do not really have the budget right now to invest in new servo motors and drives, so i would like to use the stock ones as well.

its bad enough that you wont be able to use it in my experience.

timfaber wrote: I also saw there is are lots of tuning options on the stock drives, loads of potentiometers. Anyone that has been playing around with those? btw my xyz driver is a Sanyo Denki model: BA020FFWB-301

the drives are perfectly tuned, i would not tamper with their settings. its only linuxcnc that needs tuning (which doesnt work well)

timfaber wrote: Another option would be to sell the stock driver and motors, and buy new servos and drives from China. Don't know if i will get decent money for the stock ones, i do see them over on ebay for about $500

the motors will sell for $200-$500 each.
the drive will sell for $500-$1000.

might take some time is all.

delta B3 400w / 750w kits with drive/motor/cables are $400-$500us a set plus shipping. youll also need adapter plates and new couplings.

so, youd have to spend a little more probably, BUT, youd then have the cutting edge drive performance of a brand new machine.

Thanks for your reply! Hope i can bother you with some more questions

1. I don't know the model numbers of the motors, they're never printed on them since their Brother specific motors. So maybe a bit harder to sell without model numbers? If i would get near the prices you've mentioned I've covered most of the expenses of new servo's indeed.

2. Any recommendations where to buy the Delta servo's?

3. Did you use the original drive for the spindle? if so do you have the pinout for these?

the axis motors definitely have model numbers. they are not brother specific. sanyo 25bm... the drive also has a number. that one IS brother specific. but, remember, the people buying these will likely be repairing a brother, sooo, just list them as tc225 parts with whatever numbers you find on them.

fasttobuy2012 is a good source for delta. they i think are on holidays (all china is) right now though.

the spindle drive and motor work perfectly with linuxcnc as is. dont need to change them. dont think i posted a vid for it here, but i had a "simulated" tapping cycle going and it was happy right up to 6000rpm.

ihavenofish wrote: the drives are perfectly tuned, i would not tamper with their settings. its only linuxcnc that needs tuning (which doesnt work well)

Did the drives/motors work well with the original control ?
If they did, they should work much better with LinuxCNC when properly tuned.
I did several retrofits of 15 to 25 year old machines, mostly using existing motors/drives, and always the end result was better tolerances.
Mind you, some drives are tough to tune, some are very easy, but with a bit of effort they always ended much better.