Using a Novamill with ATC that is using VR Milling 5.13. On start up with a tool in the spindle head on the first tool change, the Z-Axis travels too far down and crashes the tool holder into the tool carousel. If there is no tool in the head, it works just fine. All tool changes after that works just fine. The problem is only at the first tool change.
Any ideas? Please help - thanks.
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We'll have to have a look into it here -
is this an upgraded Novamill, or a new one supplied with VR 5 at the time ?
It could be that older machines have different tool changing heights, if its been an upgrade, and you will need to change some settings.
Are you on the latest control card (with USB interface ?)
Has the control got a green seven segment display, or a red one ?
Which machine type have you selected ?
is this an upgraded Novamill, or a new one supplied with VR 5 at the time ?
It could be that older machines have different tool changing heights, if its been an upgrade, and you will need to change some settings.
Are you on the latest control card (with USB interface ?)
Has the control got a green seven segment display, or a red one ?
Which machine type have you selected ?
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Denford Admin
- Site Admin
- Posts: 3635
- Joined: Fri 10 Feb , 2006 12:40 pm
- Hardware/Software: Go to User Control Panel > Profile
Enter as much information about your CNC hardware and software as you can - it makes it easier for everyone to know what you're talking about then. - Location: Sunny Brighouse
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Ok, we're not sure why the first tool change should be any different to subsequent ones - it uses the same sequence code in the Mint file (the logic that runs on the control card)
The sequence is (for all toolchanges):
This sequence has been the same for years, so can only guess that your machine is homing in a different Z position (Z0).
Can you check manually whether the Z-71.5 head down position is too far into the carousel with a tool fitted.
The sequence is (for all toolchanges):
- Check and exit if tool called for is the one already in the spindle (This number is stored in none-volatile RAM on the control card)
Bring Arm In
Head Down (to Z-71.5mm from home position)
Unclamp drawbar
Wait 0.3 secs
Head Up (to Z0 - or Z home position)
Spin carousel to new tool position
Head Down (to Z-71.5mm from home position)
Clamp Drawbar
Wait 0.3 secs
Head Up (to Z0 home)
Arm out (safe position)
This sequence has been the same for years, so can only guess that your machine is homing in a different Z position (Z0).
Can you check manually whether the Z-71.5 head down position is too far into the carousel with a tool fitted.
When making the first tool change is the tool fitted in the spindle and an empty slot in the carocell?
When the tool comes down to be dropped into the carocell and it crashes is it just touching the carocell or trying to drive a long way past the position?
If you do the tool change without a tool you say its OK so this would indicate the crash is by a small amount?
If so is the tool holder in tool 1 the same size as the others?
Have you tried a different tool holder in tool 1?
If the collision is only small it may be possible to adjust the toolchange distance by parameter or mechanically.
When the tool comes down to be dropped into the carocell and it crashes is it just touching the carocell or trying to drive a long way past the position?
If you do the tool change without a tool you say its OK so this would indicate the crash is by a small amount?
If so is the tool holder in tool 1 the same size as the others?
Have you tried a different tool holder in tool 1?
If the collision is only small it may be possible to adjust the toolchange distance by parameter or mechanically.